http://git-wip-us.apache.org/repos/asf/hbase-site/blob/071f974b/devapidocs/src-html/org/apache/hadoop/hbase/favored/FavoredNodeAssignmentHelper.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/favored/FavoredNodeAssignmentHelper.html b/devapidocs/src-html/org/apache/hadoop/hbase/favored/FavoredNodeAssignmentHelper.html index 0477364..2dd11c9 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/favored/FavoredNodeAssignmentHelper.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/favored/FavoredNodeAssignmentHelper.html @@ -43,817 +43,826 @@ <span class="sourceLineNo">035</span>import org.apache.commons.logging.Log;<a name="line.35"></a> <span class="sourceLineNo">036</span>import org.apache.commons.logging.LogFactory;<a name="line.36"></a> <span class="sourceLineNo">037</span>import org.apache.hadoop.conf.Configuration;<a name="line.37"></a> -<span class="sourceLineNo">038</span>import org.apache.hadoop.hbase.HBaseIOException;<a name="line.38"></a> -<span class="sourceLineNo">039</span>import org.apache.hadoop.hbase.HConstants;<a name="line.39"></a> -<span class="sourceLineNo">040</span>import org.apache.hadoop.hbase.MetaTableAccessor;<a name="line.40"></a> -<span class="sourceLineNo">041</span>import org.apache.hadoop.hbase.ServerName;<a name="line.41"></a> -<span class="sourceLineNo">042</span>import org.apache.hadoop.hbase.TableName;<a name="line.42"></a> -<span class="sourceLineNo">043</span>import org.apache.hadoop.hbase.client.Connection;<a name="line.43"></a> -<span class="sourceLineNo">044</span>import org.apache.hadoop.hbase.client.ConnectionFactory;<a name="line.44"></a> -<span class="sourceLineNo">045</span>import org.apache.hadoop.hbase.client.Put;<a name="line.45"></a> -<span class="sourceLineNo">046</span>import org.apache.hadoop.hbase.client.RegionInfo;<a name="line.46"></a> -<span class="sourceLineNo">047</span>import org.apache.hadoop.hbase.client.Table;<a name="line.47"></a> -<span class="sourceLineNo">048</span>import org.apache.hadoop.hbase.master.RackManager;<a name="line.48"></a> -<span class="sourceLineNo">049</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.49"></a> -<span class="sourceLineNo">050</span>import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;<a name="line.50"></a> -<span class="sourceLineNo">051</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.51"></a> -<span class="sourceLineNo">052</span><a name="line.52"></a> -<span class="sourceLineNo">053</span>import org.apache.hadoop.hbase.shaded.com.google.common.collect.Lists;<a name="line.53"></a> -<span class="sourceLineNo">054</span>import org.apache.hadoop.hbase.shaded.com.google.common.collect.Sets;<a name="line.54"></a> -<span class="sourceLineNo">055</span>import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;<a name="line.55"></a> -<span class="sourceLineNo">056</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.HBaseProtos;<a name="line.56"></a> -<span class="sourceLineNo">057</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.HBaseProtos.FavoredNodes;<a name="line.57"></a> -<span class="sourceLineNo">058</span><a name="line.58"></a> -<span class="sourceLineNo">059</span>/**<a name="line.59"></a> -<span class="sourceLineNo">060</span> * Helper class for {@link FavoredNodeLoadBalancer} that has all the intelligence for racks,<a name="line.60"></a> -<span class="sourceLineNo">061</span> * meta scans, etc. Instantiated by the {@link FavoredNodeLoadBalancer} when needed (from<a name="line.61"></a> -<span class="sourceLineNo">062</span> * within calls like {@link FavoredNodeLoadBalancer#randomAssignment(RegionInfo, List)}).<a name="line.62"></a> -<span class="sourceLineNo">063</span> * All updates to favored nodes should only be done from {@link FavoredNodesManager} and not<a name="line.63"></a> -<span class="sourceLineNo">064</span> * through this helper class (except for tests).<a name="line.64"></a> -<span class="sourceLineNo">065</span> */<a name="line.65"></a> -<span class="sourceLineNo">066</span>@InterfaceAudience.Private<a name="line.66"></a> -<span class="sourceLineNo">067</span>public class FavoredNodeAssignmentHelper {<a name="line.67"></a> -<span class="sourceLineNo">068</span> private static final Log LOG = LogFactory.getLog(FavoredNodeAssignmentHelper.class);<a name="line.68"></a> -<span class="sourceLineNo">069</span> private RackManager rackManager;<a name="line.69"></a> -<span class="sourceLineNo">070</span> private Map<String, List<ServerName>> rackToRegionServerMap;<a name="line.70"></a> -<span class="sourceLineNo">071</span> private List<String> uniqueRackList;<a name="line.71"></a> -<span class="sourceLineNo">072</span> // This map serves as a cache for rack to sn lookups. The num of<a name="line.72"></a> -<span class="sourceLineNo">073</span> // region server entries might not match with that is in servers.<a name="line.73"></a> -<span class="sourceLineNo">074</span> private Map<String, String> regionServerToRackMap;<a name="line.74"></a> -<span class="sourceLineNo">075</span> private Random random;<a name="line.75"></a> -<span class="sourceLineNo">076</span> private List<ServerName> servers;<a name="line.76"></a> -<span class="sourceLineNo">077</span> public static final byte [] FAVOREDNODES_QUALIFIER = Bytes.toBytes("fn");<a name="line.77"></a> -<span class="sourceLineNo">078</span> public final static short FAVORED_NODES_NUM = 3;<a name="line.78"></a> -<span class="sourceLineNo">079</span> public final static short MAX_ATTEMPTS_FN_GENERATION = 10;<a name="line.79"></a> -<span class="sourceLineNo">080</span><a name="line.80"></a> -<span class="sourceLineNo">081</span> public FavoredNodeAssignmentHelper(final List<ServerName> servers, Configuration conf) {<a name="line.81"></a> -<span class="sourceLineNo">082</span> this(servers, new RackManager(conf));<a name="line.82"></a> -<span class="sourceLineNo">083</span> }<a name="line.83"></a> -<span class="sourceLineNo">084</span><a name="line.84"></a> -<span class="sourceLineNo">085</span> public FavoredNodeAssignmentHelper(final List<ServerName> servers,<a name="line.85"></a> -<span class="sourceLineNo">086</span> final RackManager rackManager) {<a name="line.86"></a> -<span class="sourceLineNo">087</span> this.servers = servers;<a name="line.87"></a> -<span class="sourceLineNo">088</span> this.rackManager = rackManager;<a name="line.88"></a> -<span class="sourceLineNo">089</span> this.rackToRegionServerMap = new HashMap<>();<a name="line.89"></a> -<span class="sourceLineNo">090</span> this.regionServerToRackMap = new HashMap<>();<a name="line.90"></a> -<span class="sourceLineNo">091</span> this.uniqueRackList = new ArrayList<>();<a name="line.91"></a> -<span class="sourceLineNo">092</span> this.random = new Random();<a name="line.92"></a> -<span class="sourceLineNo">093</span> }<a name="line.93"></a> -<span class="sourceLineNo">094</span><a name="line.94"></a> -<span class="sourceLineNo">095</span> // Always initialize() when FavoredNodeAssignmentHelper is constructed.<a name="line.95"></a> -<span class="sourceLineNo">096</span> public void initialize() {<a name="line.96"></a> -<span class="sourceLineNo">097</span> for (ServerName sn : this.servers) {<a name="line.97"></a> -<span class="sourceLineNo">098</span> String rackName = getRackOfServer(sn);<a name="line.98"></a> -<span class="sourceLineNo">099</span> List<ServerName> serverList = this.rackToRegionServerMap.get(rackName);<a name="line.99"></a> -<span class="sourceLineNo">100</span> if (serverList == null) {<a name="line.100"></a> -<span class="sourceLineNo">101</span> serverList = Lists.newArrayList();<a name="line.101"></a> -<span class="sourceLineNo">102</span> // Add the current rack to the unique rack list<a name="line.102"></a> -<span class="sourceLineNo">103</span> this.uniqueRackList.add(rackName);<a name="line.103"></a> -<span class="sourceLineNo">104</span> this.rackToRegionServerMap.put(rackName, serverList);<a name="line.104"></a> -<span class="sourceLineNo">105</span> }<a name="line.105"></a> -<span class="sourceLineNo">106</span> for (ServerName serverName : serverList) {<a name="line.106"></a> -<span class="sourceLineNo">107</span> if (ServerName.isSameAddress(sn, serverName)) {<a name="line.107"></a> -<span class="sourceLineNo">108</span> // The server is already present, ignore.<a name="line.108"></a> -<span class="sourceLineNo">109</span> break;<a name="line.109"></a> -<span class="sourceLineNo">110</span> }<a name="line.110"></a> -<span class="sourceLineNo">111</span> }<a name="line.111"></a> -<span class="sourceLineNo">112</span> serverList.add((sn));<a name="line.112"></a> -<span class="sourceLineNo">113</span> this.regionServerToRackMap.put(sn.getHostname(), rackName);<a name="line.113"></a> -<span class="sourceLineNo">114</span> }<a name="line.114"></a> -<span class="sourceLineNo">115</span> }<a name="line.115"></a> -<span class="sourceLineNo">116</span><a name="line.116"></a> -<span class="sourceLineNo">117</span> /**<a name="line.117"></a> -<span class="sourceLineNo">118</span> * Update meta table with favored nodes info<a name="line.118"></a> -<span class="sourceLineNo">119</span> * @param regionToFavoredNodes map of RegionInfo's to their favored nodes<a name="line.119"></a> -<span class="sourceLineNo">120</span> * @param connection connection to be used<a name="line.120"></a> -<span class="sourceLineNo">121</span> * @throws IOException<a name="line.121"></a> -<span class="sourceLineNo">122</span> */<a name="line.122"></a> -<span class="sourceLineNo">123</span> public static void updateMetaWithFavoredNodesInfo(<a name="line.123"></a> -<span class="sourceLineNo">124</span> Map<RegionInfo, List<ServerName>> regionToFavoredNodes,<a name="line.124"></a> -<span class="sourceLineNo">125</span> Connection connection) throws IOException {<a name="line.125"></a> -<span class="sourceLineNo">126</span> List<Put> puts = new ArrayList<>();<a name="line.126"></a> -<span class="sourceLineNo">127</span> for (Map.Entry<RegionInfo, List<ServerName>> entry : regionToFavoredNodes.entrySet()) {<a name="line.127"></a> -<span class="sourceLineNo">128</span> Put put = makePutFromRegionInfo(entry.getKey(), entry.getValue());<a name="line.128"></a> -<span class="sourceLineNo">129</span> if (put != null) {<a name="line.129"></a> -<span class="sourceLineNo">130</span> puts.add(put);<a name="line.130"></a> -<span class="sourceLineNo">131</span> }<a name="line.131"></a> -<span class="sourceLineNo">132</span> }<a name="line.132"></a> -<span class="sourceLineNo">133</span> MetaTableAccessor.putsToMetaTable(connection, puts);<a name="line.133"></a> -<span class="sourceLineNo">134</span> LOG.info("Added " + puts.size() + " regions in META");<a name="line.134"></a> -<span class="sourceLineNo">135</span> }<a name="line.135"></a> -<span class="sourceLineNo">136</span><a name="line.136"></a> -<span class="sourceLineNo">137</span> /**<a name="line.137"></a> -<span class="sourceLineNo">138</span> * Update meta table with favored nodes info<a name="line.138"></a> -<span class="sourceLineNo">139</span> * @param regionToFavoredNodes<a name="line.139"></a> -<span class="sourceLineNo">140</span> * @param conf<a name="line.140"></a> -<span class="sourceLineNo">141</span> * @throws IOException<a name="line.141"></a> -<span class="sourceLineNo">142</span> */<a name="line.142"></a> -<span class="sourceLineNo">143</span> public static void updateMetaWithFavoredNodesInfo(<a name="line.143"></a> -<span class="sourceLineNo">144</span> Map<RegionInfo, List<ServerName>> regionToFavoredNodes,<a name="line.144"></a> -<span class="sourceLineNo">145</span> Configuration conf) throws IOException {<a name="line.145"></a> -<span class="sourceLineNo">146</span> List<Put> puts = new ArrayList<>();<a name="line.146"></a> -<span class="sourceLineNo">147</span> for (Map.Entry<RegionInfo, List<ServerName>> entry : regionToFavoredNodes.entrySet()) {<a name="line.147"></a> -<span class="sourceLineNo">148</span> Put put = makePutFromRegionInfo(entry.getKey(), entry.getValue());<a name="line.148"></a> -<span class="sourceLineNo">149</span> if (put != null) {<a name="line.149"></a> -<span class="sourceLineNo">150</span> puts.add(put);<a name="line.150"></a> -<span class="sourceLineNo">151</span> }<a name="line.151"></a> -<span class="sourceLineNo">152</span> }<a name="line.152"></a> -<span class="sourceLineNo">153</span> // Write the region assignments to the meta table.<a name="line.153"></a> -<span class="sourceLineNo">154</span> // TODO: See above overrides take a Connection rather than a Configuration only the<a name="line.154"></a> -<span class="sourceLineNo">155</span> // Connection is a short circuit connection. That is not going to good in all cases, when<a name="line.155"></a> -<span class="sourceLineNo">156</span> // master and meta are not colocated. Fix when this favored nodes feature is actually used<a name="line.156"></a> -<span class="sourceLineNo">157</span> // someday.<a name="line.157"></a> -<span class="sourceLineNo">158</span> try (Connection connection = ConnectionFactory.createConnection(conf)) {<a name="line.158"></a> -<span class="sourceLineNo">159</span> try (Table metaTable = connection.getTable(TableName.META_TABLE_NAME)) {<a name="line.159"></a> -<span class="sourceLineNo">160</span> metaTable.put(puts);<a name="line.160"></a> -<span class="sourceLineNo">161</span> }<a name="line.161"></a> -<span class="sourceLineNo">162</span> }<a name="line.162"></a> -<span class="sourceLineNo">163</span> LOG.info("Added " + puts.size() + " regions in META");<a name="line.163"></a> -<span class="sourceLineNo">164</span> }<a name="line.164"></a> -<span class="sourceLineNo">165</span><a name="line.165"></a> -<span class="sourceLineNo">166</span> /**<a name="line.166"></a> -<span class="sourceLineNo">167</span> * Generates and returns a Put containing the region info for the catalog table<a name="line.167"></a> -<span class="sourceLineNo">168</span> * and the servers<a name="line.168"></a> -<span class="sourceLineNo">169</span> * @param regionInfo<a name="line.169"></a> -<span class="sourceLineNo">170</span> * @param favoredNodeList<a name="line.170"></a> -<span class="sourceLineNo">171</span> * @return Put object<a name="line.171"></a> -<span class="sourceLineNo">172</span> */<a name="line.172"></a> -<span class="sourceLineNo">173</span> static Put makePutFromRegionInfo(RegionInfo regionInfo, List<ServerName>favoredNodeList)<a name="line.173"></a> -<span class="sourceLineNo">174</span> throws IOException {<a name="line.174"></a> -<span class="sourceLineNo">175</span> Put put = null;<a name="line.175"></a> -<span class="sourceLineNo">176</span> if (favoredNodeList != null) {<a name="line.176"></a> -<span class="sourceLineNo">177</span> put = MetaTableAccessor.makePutFromRegionInfo(regionInfo);<a name="line.177"></a> -<span class="sourceLineNo">178</span> byte[] favoredNodes = getFavoredNodes(favoredNodeList);<a name="line.178"></a> -<span class="sourceLineNo">179</span> put.addImmutable(HConstants.CATALOG_FAMILY, FAVOREDNODES_QUALIFIER,<a name="line.179"></a> -<span class="sourceLineNo">180</span> EnvironmentEdgeManager.currentTime(), favoredNodes);<a name="line.180"></a> -<span class="sourceLineNo">181</span> LOG.debug("Create the region " + regionInfo.getRegionNameAsString() +<a name="line.181"></a> -<span class="sourceLineNo">182</span> " with favored nodes " + favoredNodeList);<a name="line.182"></a> -<span class="sourceLineNo">183</span> }<a name="line.183"></a> -<span class="sourceLineNo">184</span> return put;<a name="line.184"></a> -<span class="sourceLineNo">185</span> }<a name="line.185"></a> -<span class="sourceLineNo">186</span><a name="line.186"></a> -<span class="sourceLineNo">187</span> /**<a name="line.187"></a> -<span class="sourceLineNo">188</span> * @param favoredNodes The PB'ed bytes of favored nodes<a name="line.188"></a> -<span class="sourceLineNo">189</span> * @return the array of {@link ServerName} for the byte array of favored nodes.<a name="line.189"></a> -<span class="sourceLineNo">190</span> * @throws IOException<a name="line.190"></a> -<span class="sourceLineNo">191</span> */<a name="line.191"></a> -<span class="sourceLineNo">192</span> public static ServerName[] getFavoredNodesList(byte[] favoredNodes) throws IOException {<a name="line.192"></a> -<span class="sourceLineNo">193</span> FavoredNodes f = FavoredNodes.parseFrom(favoredNodes);<a name="line.193"></a> -<span class="sourceLineNo">194</span> List<HBaseProtos.ServerName> protoNodes = f.getFavoredNodeList();<a name="line.194"></a> -<span class="sourceLineNo">195</span> ServerName[] servers = new ServerName[protoNodes.size()];<a name="line.195"></a> -<span class="sourceLineNo">196</span> int i = 0;<a name="line.196"></a> -<span class="sourceLineNo">197</span> for (HBaseProtos.ServerName node : protoNodes) {<a name="line.197"></a> -<span class="sourceLineNo">198</span> servers[i++] = ProtobufUtil.toServerName(node);<a name="line.198"></a> -<span class="sourceLineNo">199</span> }<a name="line.199"></a> -<span class="sourceLineNo">200</span> return servers;<a name="line.200"></a> -<span class="sourceLineNo">201</span> }<a name="line.201"></a> -<span class="sourceLineNo">202</span><a name="line.202"></a> -<span class="sourceLineNo">203</span> /**<a name="line.203"></a> -<span class="sourceLineNo">204</span> * @param serverAddrList<a name="line.204"></a> -<span class="sourceLineNo">205</span> * @return PB'ed bytes of {@link FavoredNodes} generated by the server list.<a name="line.205"></a> -<span class="sourceLineNo">206</span> */<a name="line.206"></a> -<span class="sourceLineNo">207</span> public static byte[] getFavoredNodes(List<ServerName> serverAddrList) {<a name="line.207"></a> -<span class="sourceLineNo">208</span> FavoredNodes.Builder f = FavoredNodes.newBuilder();<a name="line.208"></a> -<span class="sourceLineNo">209</span> for (ServerName s : serverAddrList) {<a name="line.209"></a> -<span class="sourceLineNo">210</span> HBaseProtos.ServerName.Builder b = HBaseProtos.ServerName.newBuilder();<a name="line.210"></a> -<span class="sourceLineNo">211</span> b.setHostName(s.getHostname());<a name="line.211"></a> -<span class="sourceLineNo">212</span> b.setPort(s.getPort());<a name="line.212"></a> -<span class="sourceLineNo">213</span> b.setStartCode(ServerName.NON_STARTCODE);<a name="line.213"></a> -<span class="sourceLineNo">214</span> f.addFavoredNode(b.build());<a name="line.214"></a> -<span class="sourceLineNo">215</span> }<a name="line.215"></a> -<span class="sourceLineNo">216</span> return f.build().toByteArray();<a name="line.216"></a> -<span class="sourceLineNo">217</span> }<a name="line.217"></a> -<span class="sourceLineNo">218</span><a name="line.218"></a> -<span class="sourceLineNo">219</span> // Place the regions round-robin across the racks picking one server from each<a name="line.219"></a> -<span class="sourceLineNo">220</span> // rack at a time. Start with a random rack, and a random server from every rack.<a name="line.220"></a> -<span class="sourceLineNo">221</span> // If a rack doesn't have enough servers it will go to the next rack and so on.<a name="line.221"></a> -<span class="sourceLineNo">222</span> // for choosing a primary.<a name="line.222"></a> -<span class="sourceLineNo">223</span> // For example, if 4 racks (r1 .. r4) with 8 servers (s1..s8) each, one possible<a name="line.223"></a> -<span class="sourceLineNo">224</span> // placement could be r2:s5, r3:s5, r4:s5, r1:s5, r2:s6, r3:s6..<a name="line.224"></a> -<span class="sourceLineNo">225</span> // If there were fewer servers in one rack, say r3, which had 3 servers, one possible<a name="line.225"></a> -<span class="sourceLineNo">226</span> // placement could be r2:s5, <skip-r3>, r4:s5, r1:s5, r2:s6, <skip-r3> ...<a name="line.226"></a> -<span class="sourceLineNo">227</span> // The regions should be distributed proportionately to the racksizes<a name="line.227"></a> -<span class="sourceLineNo">228</span> public void placePrimaryRSAsRoundRobin(Map<ServerName, List<RegionInfo>> assignmentMap,<a name="line.228"></a> -<span class="sourceLineNo">229</span> Map<RegionInfo, ServerName> primaryRSMap, List<RegionInfo> regions) {<a name="line.229"></a> -<span class="sourceLineNo">230</span> List<String> rackList = new ArrayList<>(rackToRegionServerMap.size());<a name="line.230"></a> -<span class="sourceLineNo">231</span> rackList.addAll(rackToRegionServerMap.keySet());<a name="line.231"></a> -<span class="sourceLineNo">232</span> int rackIndex = random.nextInt(rackList.size());<a name="line.232"></a> -<span class="sourceLineNo">233</span> int maxRackSize = 0;<a name="line.233"></a> -<span class="sourceLineNo">234</span> for (Map.Entry<String,List<ServerName>> r : rackToRegionServerMap.entrySet()) {<a name="line.234"></a> -<span class="sourceLineNo">235</span> if (r.getValue().size() > maxRackSize) {<a name="line.235"></a> -<span class="sourceLineNo">236</span> maxRackSize = r.getValue().size();<a name="line.236"></a> -<span class="sourceLineNo">237</span> }<a name="line.237"></a> -<span class="sourceLineNo">238</span> }<a name="line.238"></a> -<span class="sourceLineNo">239</span> int numIterations = 0;<a name="line.239"></a> -<span class="sourceLineNo">240</span> // Initialize the current processing host index.<a name="line.240"></a> -<span class="sourceLineNo">241</span> int serverIndex = random.nextInt(maxRackSize);<a name="line.241"></a> -<span class="sourceLineNo">242</span> for (RegionInfo regionInfo : regions) {<a name="line.242"></a> -<span class="sourceLineNo">243</span> List<ServerName> currentServerList;<a name="line.243"></a> -<span class="sourceLineNo">244</span> String rackName;<a name="line.244"></a> -<span class="sourceLineNo">245</span> while (true) {<a name="line.245"></a> -<span class="sourceLineNo">246</span> rackName = rackList.get(rackIndex);<a name="line.246"></a> -<span class="sourceLineNo">247</span> numIterations++;<a name="line.247"></a> -<span class="sourceLineNo">248</span> // Get the server list for the current rack<a name="line.248"></a> -<span class="sourceLineNo">249</span> currentServerList = rackToRegionServerMap.get(rackName);<a name="line.249"></a> -<span class="sourceLineNo">250</span><a name="line.250"></a> -<span class="sourceLineNo">251</span> if (serverIndex >= currentServerList.size()) { //not enough machines in this rack<a name="line.251"></a> -<span class="sourceLineNo">252</span> if (numIterations % rackList.size() == 0) {<a name="line.252"></a> -<span class="sourceLineNo">253</span> if (++serverIndex >= maxRackSize) serverIndex = 0;<a name="line.253"></a> -<span class="sourceLineNo">254</span> }<a name="line.254"></a> -<span class="sourceLineNo">255</span> if ((++rackIndex) >= rackList.size()) {<a name="line.255"></a> -<span class="sourceLineNo">256</span> rackIndex = 0; // reset the rack index to 0<a name="line.256"></a> -<span class="sourceLineNo">257</span> }<a name="line.257"></a> -<span class="sourceLineNo">258</span> } else break;<a name="line.258"></a> -<span class="sourceLineNo">259</span> }<a name="line.259"></a> -<span class="sourceLineNo">260</span><a name="line.260"></a> -<span class="sourceLineNo">261</span> // Get the current process region server<a name="line.261"></a> -<span class="sourceLineNo">262</span> ServerName currentServer = currentServerList.get(serverIndex);<a name="line.262"></a> -<span class="sourceLineNo">263</span><a name="line.263"></a> -<span class="sourceLineNo">264</span> // Place the current region with the current primary region server<a name="line.264"></a> -<span class="sourceLineNo">265</span> primaryRSMap.put(regionInfo, currentServer);<a name="line.265"></a> -<span class="sourceLineNo">266</span> if (assignmentMap != null) {<a name="line.266"></a> -<span class="sourceLineNo">267</span> List<RegionInfo> regionsForServer = assignmentMap.get(currentServer);<a name="line.267"></a> -<span class="sourceLineNo">268</span> if (regionsForServer == null) {<a name="line.268"></a> -<span class="sourceLineNo">269</span> regionsForServer = new ArrayList<>();<a name="line.269"></a> -<span class="sourceLineNo">270</span> assignmentMap.put(currentServer, regionsForServer);<a name="line.270"></a> -<span class="sourceLineNo">271</span> }<a name="line.271"></a> -<span class="sourceLineNo">272</span> regionsForServer.add(regionInfo);<a name="line.272"></a> -<span class="sourceLineNo">273</span> }<a name="line.273"></a> -<span class="sourceLineNo">274</span><a name="line.274"></a> -<span class="sourceLineNo">275</span> // Set the next processing index<a name="line.275"></a> -<span class="sourceLineNo">276</span> if (numIterations % rackList.size() == 0) {<a name="line.276"></a> -<span class="sourceLineNo">277</span> ++serverIndex;<a name="line.277"></a> -<span class="sourceLineNo">278</span> }<a name="line.278"></a> -<span class="sourceLineNo">279</span> if ((++rackIndex) >= rackList.size()) {<a name="line.279"></a> -<span class="sourceLineNo">280</span> rackIndex = 0; // reset the rack index to 0<a name="line.280"></a> -<span class="sourceLineNo">281</span> }<a name="line.281"></a> -<span class="sourceLineNo">282</span> }<a name="line.282"></a> -<span class="sourceLineNo">283</span> }<a name="line.283"></a> -<span class="sourceLineNo">284</span><a name="line.284"></a> -<span class="sourceLineNo">285</span> public Map<RegionInfo, ServerName[]> placeSecondaryAndTertiaryRS(<a name="line.285"></a> -<span class="sourceLineNo">286</span> Map<RegionInfo, ServerName> primaryRSMap) {<a name="line.286"></a> -<span class="sourceLineNo">287</span> Map<RegionInfo, ServerName[]> secondaryAndTertiaryMap = new HashMap<>();<a name="line.287"></a> -<span class="sourceLineNo">288</span> for (Map.Entry<RegionInfo, ServerName> entry : primaryRSMap.entrySet()) {<a name="line.288"></a> -<span class="sourceLineNo">289</span> // Get the target region and its primary region server rack<a name="line.289"></a> -<span class="sourceLineNo">290</span> RegionInfo regionInfo = entry.getKey();<a name="line.290"></a> -<span class="sourceLineNo">291</span> ServerName primaryRS = entry.getValue();<a name="line.291"></a> -<span class="sourceLineNo">292</span> try {<a name="line.292"></a> -<span class="sourceLineNo">293</span> // Create the secondary and tertiary region server pair object.<a name="line.293"></a> -<span class="sourceLineNo">294</span> ServerName[] favoredNodes = getSecondaryAndTertiary(regionInfo, primaryRS);<a name="line.294"></a> -<span class="sourceLineNo">295</span> if (favoredNodes != null) {<a name="line.295"></a> -<span class="sourceLineNo">296</span> secondaryAndTertiaryMap.put(regionInfo, favoredNodes);<a name="line.296"></a> -<span class="sourceLineNo">297</span> LOG.debug("Place the secondary and tertiary region server for region "<a name="line.297"></a> -<span class="sourceLineNo">298</span> + regionInfo.getRegionNameAsString());<a name="line.298"></a> -<span class="sourceLineNo">299</span> }<a name="line.299"></a> -<span class="sourceLineNo">300</span> } catch (Exception e) {<a name="line.300"></a> -<span class="sourceLineNo">301</span> LOG.warn("Cannot place the favored nodes for region " +<a name="line.301"></a> -<span class="sourceLineNo">302</span> regionInfo.getRegionNameAsString() + " because " + e, e);<a name="line.302"></a> -<span class="sourceLineNo">303</span> continue;<a name="line.303"></a> -<span class="sourceLineNo">304</span> }<a name="line.304"></a> -<span class="sourceLineNo">305</span> }<a name="line.305"></a> -<span class="sourceLineNo">306</span> return secondaryAndTertiaryMap;<a name="line.306"></a> -<span class="sourceLineNo">307</span> }<a name="line.307"></a> -<span class="sourceLineNo">308</span><a name="line.308"></a> -<span class="sourceLineNo">309</span> public ServerName[] getSecondaryAndTertiary(RegionInfo regionInfo, ServerName primaryRS)<a name="line.309"></a> -<span class="sourceLineNo">310</span> throws IOException {<a name="line.310"></a> -<span class="sourceLineNo">311</span><a name="line.311"></a> -<span class="sourceLineNo">312</span> ServerName[] favoredNodes;// Get the rack for the primary region server<a name="line.312"></a> -<span class="sourceLineNo">313</span> String primaryRack = getRackOfServer(primaryRS);<a name="line.313"></a> -<span class="sourceLineNo">314</span><a name="line.314"></a> -<span class="sourceLineNo">315</span> if (getTotalNumberOfRacks() == 1) {<a name="line.315"></a> -<span class="sourceLineNo">316</span> favoredNodes = singleRackCase(regionInfo, primaryRS, primaryRack);<a name="line.316"></a> -<span class="sourceLineNo">317</span> } else {<a name="line.317"></a> -<span class="sourceLineNo">318</span> favoredNodes = multiRackCase(regionInfo, primaryRS, primaryRack);<a name="line.318"></a> -<span class="sourceLineNo">319</span> }<a name="line.319"></a> -<span class="sourceLineNo">320</span> return favoredNodes;<a name="line.320"></a> -<span class="sourceLineNo">321</span> }<a name="line.321"></a> -<span class="sourceLineNo">322</span><a name="line.322"></a> -<span class="sourceLineNo">323</span> private Map<ServerName, Set<RegionInfo>> mapRSToPrimaries(<a name="line.323"></a> -<span class="sourceLineNo">324</span> Map<RegionInfo, ServerName> primaryRSMap) {<a name="line.324"></a> -<span class="sourceLineNo">325</span> Map<ServerName, Set<RegionInfo>> primaryServerMap = new HashMap<>();<a name="line.325"></a> -<span class="sourceLineNo">326</span> for (Entry<RegionInfo, ServerName> e : primaryRSMap.entrySet()) {<a name="line.326"></a> -<span class="sourceLineNo">327</span> Set<RegionInfo> currentSet = primaryServerMap.get(e.getValue());<a name="line.327"></a> -<span class="sourceLineNo">328</span> if (currentSet == null) {<a name="line.328"></a> -<span class="sourceLineNo">329</span> currentSet = new HashSet<>();<a name="line.329"></a> -<span class="sourceLineNo">330</span> }<a name="line.330"></a> -<span class="sourceLineNo">331</span> currentSet.add(e.getKey());<a name="line.331"></a> -<span class="sourceLineNo">332</span> primaryServerMap.put(e.getValue(), currentSet);<a name="line.332"></a> -<span class="sourceLineNo">333</span> }<a name="line.333"></a> -<span class="sourceLineNo">334</span> return primaryServerMap;<a name="line.334"></a> -<span class="sourceLineNo">335</span> }<a name="line.335"></a> -<span class="sourceLineNo">336</span><a name="line.336"></a> -<span class="sourceLineNo">337</span> /**<a name="line.337"></a> -<span class="sourceLineNo">338</span> * For regions that share the primary, avoid placing the secondary and tertiary<a name="line.338"></a> -<span class="sourceLineNo">339</span> * on a same RS. Used for generating new assignments for the<a name="line.339"></a> -<span class="sourceLineNo">340</span> * primary/secondary/tertiary RegionServers<a name="line.340"></a> -<span class="sourceLineNo">341</span> * @param primaryRSMap<a name="line.341"></a> -<span class="sourceLineNo">342</span> * @return the map of regions to the servers the region-files should be hosted on<a name="line.342"></a> -<span class="sourceLineNo">343</span> */<a name="line.343"></a> -<span class="sourceLineNo">344</span> public Map<RegionInfo, ServerName[]> placeSecondaryAndTertiaryWithRestrictions(<a name="line.344"></a> -<span class="sourceLineNo">345</span> Map<RegionInfo, ServerName> primaryRSMap) {<a name="line.345"></a> -<span class="sourceLineNo">346</span> Map<ServerName, Set<RegionInfo>> serverToPrimaries =<a name="line.346"></a> -<span class="sourceLineNo">347</span> mapRSToPrimaries(primaryRSMap);<a name="line.347"></a> -<span class="sourceLineNo">348</span> Map<RegionInfo, ServerName[]> secondaryAndTertiaryMap = new HashMap<>();<a name="line.348"></a> -<span class="sourceLineNo">349</span><a name="line.349"></a> -<span class="sourceLineNo">350</span> for (Entry<RegionInfo, ServerName> entry : primaryRSMap.entrySet()) {<a name="line.350"></a> -<span class="sourceLineNo">351</span> // Get the target region and its primary region server rack<a name="line.351"></a> -<span class="sourceLineNo">352</span> RegionInfo regionInfo = entry.getKey();<a name="line.352"></a> -<span class="sourceLineNo">353</span> ServerName primaryRS = entry.getValue();<a name="line.353"></a> -<span class="sourceLineNo">354</span> try {<a name="line.354"></a> -<span class="sourceLineNo">355</span> // Get the rack for the primary region server<a name="line.355"></a> -<span class="sourceLineNo">356</span> String primaryRack = getRackOfServer(primaryRS);<a name="line.356"></a> -<span class="sourceLineNo">357</span> ServerName[] favoredNodes = null;<a name="line.357"></a> -<span class="sourceLineNo">358</span> if (getTotalNumberOfRacks() == 1) {<a name="line.358"></a> -<span class="sourceLineNo">359</span> // Single rack case: have to pick the secondary and tertiary<a name="line.359"></a> -<span class="sourceLineNo">360</span> // from the same rack<a name="line.360"></a> -<span class="sourceLineNo">361</span> favoredNodes = singleRackCase(regionInfo, primaryRS, primaryRack);<a name="line.361"></a> -<span class="sourceLineNo">362</span> } else {<a name="line.362"></a> -<span class="sourceLineNo">363</span> favoredNodes = multiRackCaseWithRestrictions(serverToPrimaries,<a name="line.363"></a> -<span class="sourceLineNo">364</span> secondaryAndTertiaryMap, primaryRack, primaryRS, regionInfo);<a name="line.364"></a> -<span class="sourceLineNo">365</span> }<a name="line.365"></a> -<span class="sourceLineNo">366</span> if (favoredNodes != null) {<a name="line.366"></a> -<span class="sourceLineNo">367</span> secondaryAndTertiaryMap.put(regionInfo, favoredNodes);<a name="line.367"></a> -<span class="sourceLineNo">368</span> LOG.debug("Place the secondary and tertiary region server for region "<a name="line.368"></a> -<span class="sourceLineNo">369</span> + regionInfo.getRegionNameAsString());<a name="line.369"></a> -<span class="sourceLineNo">370</span> }<a name="line.370"></a> -<span class="sourceLineNo">371</span> } catch (Exception e) {<a name="line.371"></a> -<span class="sourceLineNo">372</span> LOG.warn("Cannot place the favored nodes for region "<a name="line.372"></a> -<span class="sourceLineNo">373</span> + regionInfo.getRegionNameAsString() + " because " + e, e);<a name="line.373"></a> -<span class="sourceLineNo">374</span> continue;<a name="line.374"></a> -<span class="sourceLineNo">375</span> }<a name="line.375"></a> -<span class="sourceLineNo">376</span> }<a name="line.376"></a> -<span class="sourceLineNo">377</span> return secondaryAndTertiaryMap;<a name="line.377"></a> -<span class="sourceLineNo">378</span> }<a name="line.378"></a> -<span class="sourceLineNo">379</span><a name="line.379"></a> -<span class="sourceLineNo">380</span> private ServerName[] multiRackCaseWithRestrictions(<a name="line.380"></a> -<span class="sourceLineNo">381</span> Map<ServerName, Set<RegionInfo>> serverToPrimaries,<a name="line.381"></a> -<span class="sourceLineNo">382</span> Map<RegionInfo, ServerName[]> secondaryAndTertiaryMap,<a name="line.382"></a> -<span class="sourceLineNo">383</span> String primaryRack, ServerName primaryRS, RegionInfo regionInfo) throws IOException {<a name="line.383"></a> -<span class="sourceLineNo">384</span> // Random to choose the secondary and tertiary region server<a name="line.384"></a> -<span class="sourceLineNo">385</span> // from another rack to place the secondary and tertiary<a name="line.385"></a> -<span class="sourceLineNo">386</span> // Random to choose one rack except for the current rack<a name="line.386"></a> -<span class="sourceLineNo">387</span> Set<String> rackSkipSet = new HashSet<>();<a name="line.387"></a> -<span class="sourceLineNo">388</span> rackSkipSet.add(primaryRack);<a name="line.388"></a> -<span class="sourceLineNo">389</span> String secondaryRack = getOneRandomRack(rackSkipSet);<a name="line.389"></a> -<span class="sourceLineNo">390</span> List<ServerName> serverList = getServersFromRack(secondaryRack);<a name="line.390"></a> -<span class="sourceLineNo">391</span> Set<ServerName> serverSet = new HashSet<>();<a name="line.391"></a> -<span class="sourceLineNo">392</span> serverSet.addAll(serverList);<a name="line.392"></a> -<span class="sourceLineNo">393</span> ServerName[] favoredNodes;<a name="line.393"></a> -<span class="sourceLineNo">394</span> if (serverList.size() >= 2) {<a name="line.394"></a> -<span class="sourceLineNo">395</span> // Randomly pick up two servers from this secondary rack<a name="line.395"></a> -<span class="sourceLineNo">396</span> // Skip the secondary for the tertiary placement<a name="line.396"></a> -<span class="sourceLineNo">397</span> // skip the servers which share the primary already<a name="line.397"></a> -<span class="sourceLineNo">398</span> Set<RegionInfo> primaries = serverToPrimaries.get(primaryRS);<a name="line.398"></a> -<span class="sourceLineNo">399</span> Set<ServerName> skipServerSet = new HashSet<>();<a name="line.399"></a> -<span class="sourceLineNo">400</span> while (true) {<a name="line.400"></a> -<span class="sourceLineNo">401</span> ServerName[] secondaryAndTertiary = null;<a name="line.401"></a> -<span class="sourceLineNo">402</span> if (primaries.size() > 1) {<a name="line.402"></a> -<span class="sourceLineNo">403</span> // check where his tertiary and secondary are<a name="line.403"></a> -<span class="sourceLineNo">404</span> for (RegionInfo primary : primaries) {<a name="line.404"></a> -<span class="sourceLineNo">405</span> secondaryAndTertiary = secondaryAndTertiaryMap.get(primary);<a name="line.405"></a> -<span class="sourceLineNo">406</span> if (secondaryAndTertiary != null) {<a name="line.406"></a> -<span class="sourceLineNo">407</span> if (getRackOfServer(secondaryAndTertiary[0]).equals(secondaryRack)) {<a name="line.407"></a> -<span class="sourceLineNo">408</span> skipServerSet.add(secondaryAndTertiary[0]);<a name="line.408"></a> -<span class="sourceLineNo">409</span> }<a name="line.409"></a> -<span class="sourceLineNo">410</span> if (getRackOfServer(secondaryAndTertiary[1]).equals(secondaryRack)) {<a name="line.410"></a> -<span class="sourceLineNo">411</span> skipServerSet.add(secondaryAndTertiary[1]);<a name="line.411"></a> -<span class="sourceLineNo">412</span> }<a name="line.412"></a> -<span class="sourceLineNo">413</span> }<a name="line.413"></a> -<span class="sourceLineNo">414</span> }<a name="line.414"></a> -<span class="sourceLineNo">415</span> }<a name="line.415"></a> -<span class="sourceLineNo">416</span> if (skipServerSet.size() + 2 <= serverSet.size())<a name="line.416"></a> -<span class="sourceLineNo">417</span> break;<a name="line.417"></a> -<span class="sourceLineNo">418</span> skipServerSet.clear();<a name="line.418"></a> -<span class="sourceLineNo">419</span> rackSkipSet.add(secondaryRack);<a name="line.419"></a> -<span class="sourceLineNo">420</span> // we used all racks<a name="line.420"></a> -<span class="sourceLineNo">421</span> if (rackSkipSet.size() == getTotalNumberOfRacks()) {<a name="line.421"></a> -<span class="sourceLineNo">422</span> // remove the last two added and break<a name="line.422"></a> -<span class="sourceLineNo">423</span> skipServerSet.remove(secondaryAndTertiary[0]);<a name="line.423"></a> -<span class="sourceLineNo">424</span> skipServerSet.remove(secondaryAndTertiary[1]);<a name="line.424"></a> -<span class="sourceLineNo">425</span> break;<a name="line.425"></a> -<span class="sourceLineNo">426</span> }<a name="line.426"></a> -<span class="sourceLineNo">427</span> secondaryRack = getOneRandomRack(rackSkipSet);<a name="line.427"></a> -<span class="sourceLineNo">428</span> serverList = getServersFromRack(secondaryRack);<a name="line.428"></a> -<span class="sourceLineNo">429</span> serverSet = new HashSet<>();<a name="line.429"></a> -<span class="sourceLineNo">430</span> serverSet.addAll(serverList);<a name="line.430"></a> -<span class="sourceLineNo">431</span> }<a name="line.431"></a> -<span class="sourceLineNo">432</span><a name="line.432"></a> -<span class="sourceLineNo">433</span> // Place the secondary RS<a name="line.433"></a> -<span class="sourceLineNo">434</span> ServerName secondaryRS = getOneRandomServer(secondaryRack, skipServerSet);<a name="line.434"></a> -<span class="sourceLineNo">435</span> skipServerSet.add(secondaryRS);<a name="line.435"></a> -<span class="sourceLineNo">436</span> // Place the tertiary RS<a name="line.436"></a> -<span class="sourceLineNo">437</span> ServerName tertiaryRS = getOneRandomServer(secondaryRack, skipServerSet);<a name="line.437"></a> -<span class="sourceLineNo">438</span><a name="line.438"></a> -<span class="sourceLineNo">439</span> if (secondaryRS == null || tertiaryRS == null) {<a name="line.439"></a> -<span class="sourceLineNo">440</span> LOG.error("Cannot place the secondary and tertiary"<a name="line.440"></a> -<span class="sourceLineNo">441</span> + " region server for region "<a name="line.441"></a> -<span class="sourceLineNo">442</span> + regionInfo.getRegionNameAsString());<a name="line.442"></a> -<span class="sourceLineNo">443</span> }<a name="line.443"></a> -<span class="sourceLineNo">444</span> // Create the secondary and tertiary pair<a name="line.444"></a> -<span class="sourceLineNo">445</span> favoredNodes = new ServerName[2];<a name="line.445"></a> -<span class="sourceLineNo">446</span> favoredNodes[0] = secondaryRS;<a name="line.446"></a> -<span class="sourceLineNo">447</span> favoredNodes[1] = tertiaryRS;<a name="line.447"></a> -<span class="sourceLineNo">448</span> } else {<a name="line.448"></a> -<span class="sourceLineNo">449</span> // Pick the secondary rs from this secondary rack<a name="line.449"></a> -<span class="sourceLineNo">450</span> // and pick the tertiary from another random rack<a name="line.450"></a> -<span class="sourceLineNo">451</span> favoredNodes = new ServerName[2];<a name="line.451"></a> -<span class="sourceLineNo">452</span> ServerName secondary = getOneRandomServer(secondaryRack);<a name="line.452"></a> -<span class="sourceLineNo">453</span> favoredNodes[0] = secondary;<a name="line.453"></a> -<span class="sourceLineNo">454</span><a name="line.454"></a> -<span class="sourceLineNo">455</span> // Pick the tertiary<a name="line.455"></a> -<span class="sourceLineNo">456</span> if (getTotalNumberOfRacks() == 2) {<a name="line.456"></a> -<span class="sourceLineNo">457</span> // Pick the tertiary from the same rack of the primary RS<a name="line.457"></a> -<span class="sourceLineNo">458</span> Set<ServerName> serverSkipSet = new HashSet<>();<a name="line.458"></a> -<span class="sourceLineNo">459</span> serverSkipSet.add(primaryRS);<a name="line.459"></a> -<span class="sourceLineNo">460</span> favoredNodes[1] = getOneRandomServer(primaryRack, serverSkipSet);<a name="line.460"></a> -<span class="sourceLineNo">461</span> } else {<a name="line.461"></a> -<span class="sourceLineNo">462</span> // Pick the tertiary from another rack<a name="line.462"></a> -<span class="sourceLineNo">463</span> rackSkipSet.add(secondaryRack);<a name="line.463"></a> -<span class="sourceLineNo">464</span> String tertiaryRandomRack = getOneRandomRack(rackSkipSet);<a name="line.464"></a> -<span class="sourceLineNo">465</span> favoredNodes[1] = getOneRandomServer(tertiaryRandomRack);<a name="line.465"></a> -<span class="sourceLineNo">466</span> }<a name="line.466"></a> -<span class="sourceLineNo">467</span> }<a name="line.467"></a> -<span class="sourceLineNo">468</span> return favoredNodes;<a name="line.468"></a> -<span class="sourceLineNo">469</span> }<a name="line.469"></a> -<span class="sourceLineNo">470</span><a name="line.470"></a> -<span class="sourceLineNo">471</span> private ServerName[] singleRackCase(RegionInfo regionInfo,<a name="line.471"></a> -<span class="sourceLineNo">472</span> ServerName primaryRS,<a name="line.472"></a> -<span class="sourceLineNo">473</span> String primaryRack) throws IOException {<a name="line.473"></a> -<span class="sourceLineNo">474</span> // Single rack case: have to pick the secondary and tertiary<a name="line.474"></a> -<span class="sourceLineNo">475</span> // from the same rack<a name="line.475"></a> -<span class="sourceLineNo">476</span> List<ServerName> serverList = getServersFromRack(primaryRack);<a name="line.476"></a> -<span class="sourceLineNo">477</span> if ((serverList == null) || (serverList.size() <= 2)) {<a name="line.477"></a> -<span class="sourceLineNo">478</span> // Single region server case: cannot not place the favored nodes<a name="line.478"></a> -<span class="sourceLineNo">479</span> // on any server;<a name="line.479"></a> -<span class="sourceLineNo">480</span> return null;<a name="line.480"></a> -<span class="sourceLineNo">481</span> } else {<a name="line.481"></a> -<span class="sourceLineNo">482</span> // Randomly select two region servers from the server list and make sure<a name="line.482"></a> -<span class="sourceLineNo">483</span> // they are not overlap with the primary region server;<a name="line.483"></a> -<span class="sourceLineNo">484</span> Set<ServerName> serverSkipSet = new HashSet<>();<a name="line.484"></a> -<span class="sourceLineNo">485</span> serverSkipSet.add(primaryRS);<a name="line.485"></a> -<span class="sourceLineNo">486</span><a name="line.486"></a> -<span class="sourceLineNo">487</span> // Place the secondary RS<a name="line.487"></a> -<span class="sourceLineNo">488</span> ServerName secondaryRS = getOneRandomServer(primaryRack, serverSkipSet);<a name="line.488"></a> -<span class="sourceLineNo">489</span> // Skip the secondary for the tertiary placement<a name="line.489"></a> -<span class="sourceLineNo">490</span> serverSkipSet.add(secondaryRS);<a name="line.490"></a> -<span class="sourceLineNo">491</span> ServerName tertiaryRS = getOneRandomServer(primaryRack, serverSkipSet);<a name="line.491"></a> -<span class="sourceLineNo">492</span><a name="line.492"></a> -<span class="sourceLineNo">493</span> if (secondaryRS == null || tertiaryRS == null) {<a name="line.493"></a> -<span class="sourceLineNo">494</span> LOG.error("Cannot place the secondary, tertiary favored node for region " +<a name="line.494"></a> -<span class="sourceLineNo">495</span> regionInfo.getRegionNameAsString());<a name="line.495"></a> -<span class="sourceLineNo">496</span> }<a name="line.496"></a> -<span class="sourceLineNo">497</span> // Create the secondary and tertiary pair<a name="line.497"></a> -<span class="sourceLineNo">498</span> ServerName[] favoredNodes = new ServerName[2];<a name="line.498"></a> -<span class="sourceLineNo">499</span> favoredNodes[0] = secondaryRS;<a name="line.499"></a> -<span class="sourceLineNo">500</span> favoredNodes[1] = tertiaryRS;<a name="line.500"></a> -<span class="sourceLineNo">501</span> return favoredNodes;<a name="line.501"></a> -<span class="sourceLineNo">502</span> }<a name="line.502"></a> -<span class="sourceLineNo">503</span> }<a name="line.503"></a> -<span class="sourceLineNo">504</span><a name="line.504"></a> -<span class="sourceLineNo">505</span> /**<a name="line.505"></a> -<span class="sourceLineNo">506</span> * Place secondary and tertiary nodes in a multi rack case.<a name="line.506"></a> -<span class="sourceLineNo">507</span> * If there are only two racks, then we try the place the secondary<a name="line.507"></a> -<span class="sourceLineNo">508</span> * and tertiary on different rack than primary. But if the other rack has<a name="line.508"></a> -<span class="sourceLineNo">509</span> * only one region server, then we place primary and tertiary on one rack<a name="line.509"></a> -<span class="sourceLineNo">510</span> * and secondary on another. The aim is two distribute the three favored nodes<a name="line.510"></a> -<span class="sourceLineNo">511</span> * on >= 2 racks.<a name="line.511"></a> -<span class="sourceLineNo">512</span> * TODO: see how we can use generateMissingFavoredNodeMultiRack API here<a name="line.512"></a> -<span class="sourceLineNo">513</span> * @param regionInfo Region for which we are trying to generate FN<a name="line.513"></a> -<span class="sourceLineNo">514</span> * @param primaryRS The primary favored node.<a name="line.514"></a> -<span class="sourceLineNo">515</span> * @param primaryRack The rack of the primary favored node.<a name="line.515"></a> -<span class="sourceLineNo">516</span> * @return Array containing secondary and tertiary favored nodes.<a name="line.516"></a> -<span class="sourceLineNo">517</span> * @throws IOException Signals that an I/O exception has occurred.<a name="line.517"></a> -<span class="sourceLineNo">518</span> */<a name="line.518"></a> -<span class="sourceLineNo">519</span> private ServerName[] multiRackCase(RegionInfo regionInfo, ServerName primaryRS,<a name="line.519"></a> -<span class="sourceLineNo">520</span> String primaryRack) throws IOException {<a name="line.520"></a> -<span class="sourceLineNo">521</span><a name="line.521"></a> -<span class="sourceLineNo">522</span> List<ServerName>favoredNodes = Lists.newArrayList(primaryRS);<a name="line.522"></a> -<span class="sourceLineNo">523</span> // Create the secondary and tertiary pair<a name="line.523"></a> -<span class="sourceLineNo">524</span> ServerName secondaryRS = generateMissingFavoredNodeMultiRack(favoredNodes);<a name="line.524"></a> -<span class="sourceLineNo">525</span> favoredNodes.add(secondaryRS);<a name="line.525"></a> -<span class="sourceLineNo">526</span> String secondaryRack = getRackOfServer(secondaryRS);<a name="line.526"></a> -<span class="sourceLineNo">527</span><a name="line.527"></a> -<span class="sourceLineNo">528</span> ServerName tertiaryRS;<a name="line.528"></a> -<span class="sourceLineNo">529</span> if (primaryRack.equals(secondaryRack)) {<a name="line.529"></a> -<span class="sourceLineNo">530</span> tertiaryRS = generateMissingFavoredNode(favoredNodes);<a name="line.530"></a> -<span class="sourceLineNo">531</span> } else {<a name="line.531"></a> -<span class="sourceLineNo">532</span> // Try to place tertiary in secondary RS rack else place on primary rack.<a name="line.532"></a> -<span class="sourceLineNo">533</span> tertiaryRS = getOneRandomServer(secondaryRack, Sets.newHashSet(secondaryRS));<a name="line.533"></a> -<span class="sourceLineNo">534</span> if (tertiaryRS == null) {<a name="line.534"></a> -<span class="sourceLineNo">535</span> tertiaryRS = getOneRandomServer(primaryRack, Sets.newHashSet(primaryRS));<a name="line.535"></a> -<span class="sourceLineNo">536</span> }<a name="line.536"></a> -<span class="sourceLineNo">537</span> // We couldn't find anything in secondary rack, get any FN<a name="line.537"></a> -<span class="sourceLineNo">538</span> if (tertiaryRS == null) {<a name="line.538"></a> -<span class="sourceLineNo">539</span> tertiaryRS = generateMissingFavoredNode(Lists.newArrayList(primaryRS, secondaryRS));<a name="line.539"></a> -<span class="sourceLineNo">540</span> }<a name="line.540"></a> -<span class="sourceLineNo">541</span> }<a name="line.541"></a> -<span class="sourceLineNo">542</span> return new ServerName[]{ secondaryRS, tertiaryRS };<a name="line.542"></a> -<span class="sourceLineNo">543</span> }<a name="line.543"></a> -<span class="sourceLineNo">544</span><a name="line.544"></a> -<span class="sourceLineNo">545</span> public boolean canPlaceFavoredNodes() {<a name="line.545"></a> -<span class="sourceLineNo">546</span> return (this.servers.size() >= FAVORED_NODES_NUM);<a name="line.546"></a> -<span class="sourceLineNo">547</span> }<a name="line.547"></a> -<span class="sourceLineNo">548</span><a name="line.548"></a> -<span class="sourceLineNo">549</span> private int getTotalNumberOfRacks() {<a name="line.549"></a> -<span class="sourceLineNo">550</span> return this.uniqueRackList.size();<a name="line.550"></a> -<span class="sourceLineNo">551</span> }<a name="line.551"></a> -<span class="sourceLineNo">552</span><a name="line.552"></a> -<span class="sourceLineNo">553</span> private List<ServerName> getServersFromRack(String rack) {<a name="line.553"></a> -<span class="sourceLineNo">554</span> return this.rackToRegionServerMap.get(rack);<a name="line.554"></a> -<span class="sourceLineNo">555</span> }<a name="line.555"></a> -<span class="sourceLineNo">556</span><a name="line.556"></a> -<span class="sourceLineNo">557</span> /**<a name="line.557"></a> -<span class="sourceLineNo">558</span> * Gets a random server from the specified rack and skips anything specified.<a name="line.558"></a> -<span class="sourceLineNo">559</span><a name="line.559"></a> -<span class="sourceLineNo">560</span> * @param rack rack from a server is needed<a name="line.560"></a> -<span class="sourceLineNo">561</span> * @param skipServerSet the server shouldn't belong to this set<a name="line.561"></a> -<span class="sourceLineNo">562</span> */<a name="line.562"></a> -<span class="sourceLineNo">563</span> protected ServerName getOneRandomServer(String rack, Set<ServerName> skipServerSet) {<a name="line.563"></a> -<span class="sourceLineNo">564</span><a name="line.564"></a> -<span class="sourceLineNo">565</span> // Is the rack valid? Do we recognize it?<a name="line.565"></a> -<span class="sourceLineNo">566</span> if (rack == null || getServersFromRack(rack) == null ||<a name="line.566"></a> -<span class="sourceLineNo">567</span> getServersFromRack(rack).isEmpty()) {<a name="line.567"></a> -<span class="sourceLineNo">568</span> return null;<a name="line.568"></a> -<span class="sourceLineNo">569</span> }<a name="line.569"></a> -<span class="sourceLineNo">570</span><a name="line.570"></a> -<span class="sourceLineNo">571</span> // Lets use a set so we can eliminate duplicates<a name="line.571"></a> -<span class="sourceLineNo">572</span> Set<StartcodeAgnosticServerName> serversToChooseFrom = Sets.newHashSet();<a name="line.572"></a> -<span class="sourceLineNo">573</span> for (ServerName sn : getServersFromRack(rack)) {<a name="line.573"></a> -<span class="sourceLineNo">574</span> serversToChooseFrom.add(StartcodeAgnosticServerName.valueOf(sn));<a name="line.574"></a> -<span class="sourceLineNo">575</span> }<a name="line.575"></a> -<span class="sourceLineNo">576</span><a name="line.576"></a> -<span class="sourceLineNo">577</span> if (skipServerSet != null && skipServerSet.size() > 0) {<a name="line.577"></a> -<span class="sourceLineNo">578</span> for (ServerName sn : skipServerSet) {<a name="line.578"></a> -<span class="sourceLineNo">579</span> serversToChooseFrom.remove(StartcodeAgnosticServerName.valueOf(sn));<a name="line.579"></a> -<span class="sourceLineNo">580</span> }<a name="line.580"></a> -<span class="sourceLineNo">581</span> // Do we have any servers left to choose from?<a name="line.581"></a> -<span class="sourceLineNo">582</span> if (serversToChooseFrom.isEmpty()) {<a name="line.582"></a> -<span class="sourceLineNo">583</span> return null;<a name="line.583"></a> -<span class="sourceLineNo">584</span> }<a name="line.584"></a> -<span class="sourceLineNo">585</span> }<a name="line.585"></a> -<span class="sourceLineNo">586</span><a name="line.586"></a> -<span class="sourceLineNo">587</span> ServerName randomServer = null;<a name="line.587"></a> -<span class="sourceLineNo">588</span> int randomIndex = random.nextInt(serversToChooseFrom.size());<a name="line.588"></a> -<span class="sourceLineNo">589</span> int j = 0;<a name="line.589"></a> -<span class="sourceLineNo">590</span> for (StartcodeAgnosticServerName sn : serversToChooseFrom) {<a name="line.590"></a> -<span class="sourceLineNo">591</span> if (j == randomIndex) {<a name="line.591"></a> -<span class="sourceLineNo">592</span> randomServer = sn;<a name="line.592"></a> -<span class="sourceLineNo">593</span> break;<a name="line.593"></a> -<span class="sourceLineNo">594</span> }<a name="line.594"></a> -<span class="sourceLineNo">595</span> j++;<a name="line.595"></a> -<span class="sourceLineNo">596</span> }<a name="line.596"></a> -<span class="sourceLineNo">597</span><a name="line.597"></a> -<span class="sourceLineNo">598</span> if (randomServer != null) {<a name="line.598"></a> -<span class="sourceLineNo">599</span> return ServerName.valueOf(randomServer.getHostAndPort(), randomServer.getStartcode());<a name="line.599"></a> -<span class="sourceLineNo">600</span> } else {<a name="line.600"></a> -<span class="sourceLineNo">601</span> return null;<a name="line.601"></a> -<span class="sourceLineNo">602</span> }<a name="line.602"></a> -<span class="sourceLineNo">603</span> }<a name="line.603"></a> -<span class="sourceLineNo">604</span><a name="line.604"></a> -<span class="sourceLineNo">605</span> private ServerName getOneRandomServer(String rack) throws IOException {<a name="line.605"></a> -<span class="sourceLineNo">606</span> return this.getOneRandomServer(rack, null);<a name="line.606"></a> -<span class="sourceLineNo">607</span> }<a name="line.607"></a> -<span class="sourceLineNo">608</span><a name="line.608"></a> -<span class="sourceLineNo">609</span> protected String getOneRandomRack(Set<String> skipRackSet) throws IOException {<a name="line.609"></a> -<span class="sourceLineNo">610</span> if (skipRackSet == null || uniqueRackList.size() <= skipRackSet.size()) {<a name="line.610"></a> -<span class="sourceLineNo">611</span> throw new IOException("Cannot randomly pick another random server");<a name="line.611"></a> -<span class="sourceLineNo">612</span> }<a name="line.612"></a> +<span class="sourceLineNo">038</span>import org.apache.hadoop.hbase.CellBuilder;<a name="line.38"></a> +<span class="sourceLineNo">039</span>import org.apache.hadoop.hbase.CellBuilderFactory;<a name="line.39"></a> +<span class="sourceLineNo">040</span>import org.apache.hadoop.hbase.CellBuilderType;<a name="line.40"></a> +<span class="sourceLineNo">041</span>import org.apache.hadoop.hbase.HBaseIOException;<a name="line.41"></a> +<span class="sourceLineNo">042</span>import org.apache.hadoop.hbase.HConstants;<a name="line.42"></a> +<span class="sourceLineNo">043</span>import org.apache.hadoop.hbase.MetaTableAccessor;<a name="line.43"></a> +<span class="sourceLineNo">044</span>import org.apache.hadoop.hbase.ServerName;<a name="line.44"></a> +<span class="sourceLineNo">045</span>import org.apache.hadoop.hbase.TableName;<a name="line.45"></a> +<span class="sourceLineNo">046</span>import org.apache.hadoop.hbase.client.Connection;<a name="line.46"></a> +<span class="sourceLineNo">047</span>import org.apache.hadoop.hbase.client.ConnectionFactory;<a name="line.47"></a> +<span class="sourceLineNo">048</span>import org.apache.hadoop.hbase.client.Put;<a name="line.48"></a> +<span class="sourceLineNo">049</span>import org.apache.hadoop.hbase.client.RegionInfo;<a name="line.49"></a> +<span class="sourceLineNo">050</span>import org.apache.hadoop.hbase.client.Table;<a name="line.50"></a> +<span class="sourceLineNo">051</span>import org.apache.hadoop.hbase.master.RackManager;<a name="line.51"></a> +<span class="sourceLineNo">052</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.52"></a> +<span class="sourceLineNo">053</span>import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;<a name="line.53"></a> +<span class="sourceLineNo">054</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.54"></a> +<span class="sourceLineNo">055</span><a name="line.55"></a> +<span class="sourceLineNo">056</span>import org.apache.hadoop.hbase.shaded.com.google.common.collect.Lists;<a name="line.56"></a> +<span class="sourceLineNo">057</span>import org.apache.hadoop.hbase.shaded.com.google.common.collect.Sets;<a name="line.57"></a> +<span class="sourceLineNo">058</span>import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;<a name="line.58"></a> +<span class="sourceLineNo">059</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.HBaseProtos;<a name="line.59"></a> +<span class="sourceLineNo">060</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.HBaseProtos.FavoredNodes;<a name="line.60"></a> +<span class="sourceLineNo">061</span><a name="line.61"></a> +<span class="sourceLineNo">062</span>/**<a name="line.62"></a> +<span class="sourceLineNo">063</span> * Helper class for {@link FavoredNodeLoadBalancer} that has all the intelligence for racks,<a name="line.63"></a> +<span class="sourceLineNo">064</span> * meta scans, etc. Instantiated by the {@link FavoredNodeLoadBalancer} when needed (from<a name="line.64"></a> +<span class="sourceLineNo">065</span> * within calls like {@link FavoredNodeLoadBalancer#randomAssignment(RegionInfo, List)}).<a name="line.65"></a> +<span class="sourceLineNo">066</span> * All updates to favored nodes should only be done from {@link FavoredNodesManager} and not<a name="line.66"></a> +<span class="sourceLineNo">067</span> * through this helper class (except for tests).<a name="line.67"></a> +<span class="sourceLineNo">068</span> */<a name="line.68"></a> +<span class="sourceLineNo">069</span>@InterfaceAudience.Private<a name="line.69"></a> +<span class="sourceLineNo">070</span>public class FavoredNodeAssignmentHelper {<a name="line.70"></a> +<span class="sourceLineNo">071</span> private static final Log LOG = LogFactory.getLog(FavoredNodeAssignmentHelper.class);<a name="line.71"></a> +<span class="sourceLineNo">072</span> private RackManager rackManager;<a name="line.72"></a> +<span class="sourceLineNo">073</span> private Map<String, List<ServerName>> rackToRegionServerMap;<a name="line.73"></a> +<span class="sourceLineNo">074</span> private List<String> uniqueRackList;<a name="line.74"></a> +<span class="sourceLineNo">075</span> // This map serves as a cache for rack to sn lookups. The num of<a name="line.75"></a> +<span class="sourceLineNo">076</span> // region server entries might not match with that is in servers.<a name="line.76"></a> +<span class="sourceLineNo">077</span> private Map<String, String> regionServerToRackMap;<a name="line.77"></a> +<span class="sourceLineNo">078</span> private Random random;<a name="line.78"></a> +<span class="sourceLineNo">079</span> private List<ServerName> servers;<a name="line.79"></a> +<span class="sourceLineNo">080</span> public static final byte [] FAVOREDNODES_QUALIFIER = Bytes.toBytes("fn");<a name="line.80"></a> +<span class="sourceLineNo">081</span> public final static short FAVORED_NODES_NUM = 3;<a name="line.81"></a> +<span class="sourceLineNo">082</span> public final static short MAX_ATTEMPTS_FN_GENERATION = 10;<a name="line.82"></a> +<span class="sourceLineNo">083</span><a name="line.83"></a> +<span class="sourceLineNo">084</span> public FavoredNodeAssignmentHelper(final List<ServerName> servers, Configuration conf) {<a name="line.84"></a> +<span class="sourceLineNo">085</span> this(servers, new RackManager(conf));<a name="line.85"></a> +<span class="sourceLineNo">086</span> }<a name="line.86"></a> +<span class="sourceLineNo">087</span><a name="line.87"></a> +<span class="sourceLineNo">088</span> public FavoredNodeAssignmentHelper(final List<ServerName> servers,<a name="line.88"></a> +<span class="sourceLineNo">089</span> final RackManager rackManager) {<a name="line.89"></a> +<span class="sourceLineNo">090</span> this.servers = servers;<a name="line.90"></a> +<span class="sourceLineNo">091</span> this.rackManager = rackManager;<a name="line.91"></a> +<span class="sourceLineNo">092</span> this.rackToRegionServerMap = new HashMap<>();<a name="line.92"></a> +<span class="sourceLineNo">093</span> this.regionServerToRackMap = new HashMap<>();<a name="line.93"></a> +<span class="sourceLineNo">094</span> this.uniqueRackList = new ArrayList<>();<a name="line.94"></a> +<span class="sourceLineNo">095</span> this.random = new Random();<a name="line.95"></a> +<span class="sourceLineNo">096</span> }<a name="line.96"></a> +<span class="sourceLineNo">097</span><a name="line.97"></a> +<span class="sourceLineNo">098</span> // Always initialize() when FavoredNodeAssignmentHelper is constructed.<a name="line.98"></a> +<span class="sourceLineNo">099</span> public void initialize() {<a name="line.99"></a> +<span class="sourceLineNo">100</span> for (ServerName sn : this.servers) {<a name="line.100"></a> +<span class="sourceLineNo">101</span> String rackName = getRackOfServer(sn);<a name="line.101"></a> +<span class="sourceLineNo">102</span> List<ServerName> serverList = this.rackToRegionServerMap.get(rackName);<a name="line.102"></a> +<span class="sourceLineNo">103</span> if (serverList == null) {<a name="line.103"></a> +<span class="sourceLineNo">104</span> serverList = Lists.newArrayList();<a name="line.104"></a> +<span class="sourceLineNo">105</span> // Add the current rack to the unique rack list<a name="line.105"></a> +<span class="sourceLineNo">106</span> this.uniqueRackList.add(rackName);<a name="line.106"></a> +<span class="sourceLineNo">107</span> this.rackToRegionServerMap.put(rackName, serverList);<a name="line.107"></a> +<span class="sourceLineNo">108</span> }<a name="line.108"></a> +<span class="sourceLineNo">109</span> for (ServerName serverName : serverList) {<a name="line.109"></a> +<span class="sourceLineNo">110</span> if (ServerName.isSameAddress(sn, serverName)) {<a name="line.110"></a> +<span class="sourceLineNo">111</span> // The server is already present, ignore.<a name="line.111"></a> +<span class="sourceLineNo">112</span> break;<a name="line.112"></a> +<span class="sourceLineNo">113</span> }<a name="line.113"></a> +<span class="sourceLineNo">114</span> }<a name="line.114"></a> +<span class="sourceLineNo">115</span> serverList.add((sn));<a name="line.115"></a> +<span class="sourceLineNo">116</span> this.regionServerToRackMap.put(sn.getHostname(), rackName);<a name="line.116"></a> +<span class="sourceLineNo">117</span> }<a name="line.117"></a> +<span class="sourceLineNo">118</span> }<a name="line.118"></a> +<span class="sourceLineNo">119</span><a name="line.119"></a> +<span class="sourceLineNo">120</span> /**<a name="line.120"></a> +<span class="sourceLineNo">121</span> * Update meta table with favored nodes info<a name="line.121"></a> +<span class="sourceLineNo">122</span> * @param regionToFavoredNodes map of RegionInfo's to their favored nodes<a name="line.122"></a> +<span class="sourceLineNo">123</span> * @param connection connection to be used<a name="line.123"></a> +<span class="sourceLineNo">124</span> * @throws IOException<a name="line.124"></a> +<span class="sourceLineNo">125</span> */<a name="line.125"></a> +<span class="sourceLineNo">126</span> public static void updateMetaWithFavoredNodesInfo(<a name="line.126"></a> +<span class="sourceLineNo">127</span> Map<RegionInfo, List<ServerName>> regionToFavoredNodes,<a name="line.127"></a> +<span class="sourceLineNo">128</span> Connection connection) throws IOException {<a name="line.128"></a> +<span class="sourceLineNo">129</span> List<Put> puts = new ArrayList<>();<a name="line.129"></a> +<span class="sourceLineNo">130</span> for (Map.Entry<RegionInfo, List<ServerName>> entry : regionToFavoredNodes.entrySet()) {<a name="line.130"></a> +<span class="sourceLineNo">131</span> Put put = makePutFromRegionInfo(entry.getKey(), entry.getValue());<a name="line.131"></a> +<span class="sourceLineNo">132</span> if (put != null) {<a name="line.132"></a> +<span class="sourceLineNo">133</span> puts.add(put);<a name="line.133"></a> +<span class="sourceLineNo">134</span> }<a name="line.134"></a> +<span class="sourceLineNo">135</span> }<a name="line.135"></a> +<span class="sourceLineNo">136</span> MetaTableAccessor.putsToMetaTable(connection, puts);<a name="line.136"></a> +<span class="sourceLineNo">137</span> LOG.info("Added " + puts.size() + " regions in META");<a name="line.137"></a> +<span class="sourceLineNo">138</span> }<a name="line.138"></a> +<span class="sourceLineNo">139</span><a name="line.139"></a> +<span class="sourceLineNo">140</span> /**<a name="line.140"></a> +<span class="sourceLineNo">141</span> * Update meta table with favored nodes info<a name="line.141"></a> +<span class="sourceLineNo">142</span> * @param regionToFavoredNodes<a name="line.142"></a> +<span class="sourceLineNo">143</span> * @param conf<a name="line.143"></a> +<span class="sourceLineNo">144</span> * @throws IOException<a name="line.144"></a> +<span class="sourceLineNo">145</span> */<a name="line.145"></a> +<span class="sourceLineNo">146</span> public static void updateMetaWithFavoredNodesInfo(<a name="line.146"></a> +<span class="sourceLineNo">147</span> Map<RegionInfo, List<ServerName>> regionToFavoredNodes,<a name="line.147"></a> +<span class="sourceLineNo">148</span> Configuration conf) throws IOException {<a name="line.148"></a> +<span class="sourceLineNo">149</span> List<Put> puts = new ArrayList<>();<a name="line.149"></a> +<span class="sourceLineNo">150</span> for (Map.Entry<RegionInfo, List<ServerName>> entry : regionToFavoredNodes.entrySet()) {<a name="line.150"></a> +<span class="sourceLineNo">151</span> Put put = makePutFromRegionInfo(entry.getKey(), entry.getValue());<a name="line.151"></a> +<span class="sourceLineNo">152</span> if (put != null) {<a name="line.152"></a> +<span class="sourceLineNo">153</span> puts.add(put);<a name="line.153"></a> +<span class="sourceLineNo">154</span> }<a name="line.154"></a> +<span class="sourceLineNo">155</span> }<a name="line.155"></a> +<span class="sourceLineNo">156</span> // Write the region assignments to the meta table.<a name="line.156"></a> +<span class="sourceLineNo">157</span> // TODO: See above overrides take a Connection rather than a Configuration only the<a name="line.157"></a> +<span class="sourceLineNo">158</span> // Connection is a short circuit connection. That is not going to good in all cases, when<a name="line.158"></a> +<span class="sourceLineNo">159</span> // master and meta are not colocated. Fix when this favored nodes feature is actually used<a name="line.159"></a> +<span class="sourceLineNo">160</span> // someday.<a name="line.160"></a> +<span class="sourceLineNo">161</span> try (Connection connection = ConnectionFactory.createConnection(conf)) {<a name="line.161"></a> +<span class="sourceLineNo">162</span> try (Table metaTable = connection.getTable(TableName.META_TABLE_NAME)) {<a name="line.162"></a> +<span class="sourceLineNo">163</span> metaTable.put(puts);<a name="line.163"></a> +<span class="sourceLineNo">164</span> }<a name="line.164"></a> +<span class="sourceLineNo">165</span> }<a name="line.165"></a> +<span class="sourceLineNo">166</span> LOG.info("Added " + puts.size() + " regions in META");<a name="line.166"></a> +<span class="sourceLineNo">167</span> }<a name="line.167"></a> +<span class="sourceLineNo">168</span><a name="line.168"></a> +<span class="sourceLineNo">169</span> /**<a name="line.169"></a> +<span class="sourceLineNo">170</span> * Generates and returns a Put containing the region info for the catalog table<a name="line.170"></a> +<span class="sourceLineNo">171</span> * and the servers<a name="line.171"></a> +<span class="sourceLineNo">172</span> * @param regionInfo<a name="line.172"></a> +<span class="sourceLineNo">173</span> * @param favoredNodeList<a name="line.173"></a> +<span class="sourceLineNo">174</span> * @return Put object<a name="line.174"></a> +<span class="sourceLineNo">175</span> */<a name="line.175"></a> +<span class="sourceLineNo">176</span> static Put makePutFromRegionInfo(RegionInfo regionInfo, List<ServerName>favoredNodeList)<a name="line.176"></a> +<span class="sourceLineNo">177</span> throws IOException {<a name="line.177"></a> +<span class="sourceLineNo">178</span> Put put = null;<a name="line.178"></a> +<span class="sourceLineNo">179</span> if (favoredNodeList != null) {<a name="line.179"></a> +<span class="sourceLineNo">180</span> put = MetaTableAccessor.makePutFromRegionInfo(regionInfo);<a name="line.180"></a> +<span class="sourceLineNo">181</span> byte[] favoredNodes = getFavoredNodes(favoredNodeList);<a name="line.181"></a> +<span class="sourceLineNo">182</span> put.add(CellBuilderFactory.create(CellBuilderType.SHALLOW_COPY)<a name="line.182"></a> +<span class="sourceLineNo">183</span> .setRow(put.getRow())<a name="line.183"></a> +<span class="sourceLineNo">184</span> .setFamily(HConstants.CATALOG_FAMILY)<a name="line.184"></a> +<span class="sourceLineNo">185</span> .setQualifier(FAVOREDNODES_QUALIFIER)<a name="line.185"></a> +<span class="sourceLineNo">186</span> .setTimestamp(EnvironmentEdgeManager.currentTime())<a name="line.186"></a> +<span class="sourceLineNo">187</span> .setType(CellBuilder.DataType.Put)<a name="line.187"></a> +<span class="sourceLineNo">188</span> .setValue(favoredNodes)<a name="line.188"></a> +<span class="sourceLineNo">189</span> .build());<a name="line.189"></a> +<span class="sourceLineNo">190</span> LOG.debug("Create the region " + regionInfo.getRegionNameAsString() +<a name="line.190"></a> +<span class="sourceLineNo">191</span> " with favored nodes " + favoredNodeList);<a name="line.191"></a> +<span class="sourceLineNo">192</span> }<a name="line.192"></a> +<span class="sourceLineNo">193</span> return put;<a name="line.193"></a> +<span class="sourceLineNo">194</span> }<a name="line.194"></a> +<span class="sourceLineNo">195</span><a name="line.195"></a> +<span class="sourceLineNo">196</span> /**<a name="line.196"></a> +<span class="sourceLineNo">197</span> * @param favoredNodes The PB'ed bytes of favored nodes<a name="line.197"></a> +<span class="sourceLineNo">198</span> * @return the array of {@link ServerName} for the byte array of favored nodes.<a name="line.198"></a> +<span class="sourceLineNo">199</span> * @throws IOException<a name="line.199"></a> +<span class="sourceLineNo">200</span> */<a name="line.200"></a> +<span class="sourceLineNo">201</span> public static ServerName[] getFavoredNodesList(byte[] favoredNodes) throws IOException {<a name="line.201"></a> +<span class="sourceLineNo">202</span> FavoredNodes f = FavoredNodes.parseFrom(favoredNodes);<a name="line.202"></a> +<span class="sourceLineNo">203</span> List<HBaseProtos.ServerName> protoNodes = f.getFavoredNodeList();<a name="line.203"></a> +<span class="sourceLineNo">204</span> ServerName[] servers = new ServerName[protoNodes.size()];<a name="line.204"></a> +<span class="sourceLineNo">205</span> int i = 0;<a name="line.205"></a> +<span class="sourceLineNo">206</span> for (HBaseProtos.ServerName node : protoNodes) {<a name="line.206"></a> +<span class="sourceLineNo">207</span> servers[i++] = ProtobufUtil.toServerName(node);<a name="line.207"></a> +<span class="sourceLineNo">208</span> }<a name="line.208"></a> +<span class="sourceLineNo">209</span> return servers;<a name="line.209"></a> +<span class="sourceLineNo">210</span> }<a name="line.210"></a> +<span class="sourceLineNo">211</span><a name="line.211"></a> +<span class="sourceLineNo">212</span> /**<a name="line.212"></a> +<span class="sourceLineNo">213</span> * @param serverAddrList<a name="line.213"></a> +<span class="sourceLineNo">214</span> * @return PB'ed bytes of {@link FavoredNodes} generated by the server list.<a name="line.214"></a> +<span class="sourceLineNo">215</span> */<a name="line.215"></a> +<span class="sourceLineNo">216</span> public static byte[] getFavoredNodes(List<ServerName> serverAddrList) {<a name="line.216"></a> +<span class="sourceLineNo">217</span> FavoredNodes.Builder f = FavoredNodes.newBuilder();<a name="line.217"></a> +<span class="sourceLineNo">218</span> for (ServerName s : serverAddrList) {<a name="line.218"></a> +<span class="sourceLineNo">219</span> HBaseProtos.ServerName.Builder b = HBaseProtos.ServerName.newBuilder();<a name="line.219"></a> +<span class="sourceLineNo">220</span> b.setHostName(s.getHostname());<a name="line.220"></a> +<span class="sourceLineNo">221</span> b.setPort(s.getPort());<a name="line.221"></a> +<span class="sourceLineNo">222</span> b.setStartCode(ServerName.NON_STARTCODE);<a name="line.222"></a> +<span class="sourceLineNo">223</span> f.addFavoredNode(b.build());<a name="line.223"></a> +<span class="sourceLineNo">224</span> }<a name="line.224"></a> +<span class="sourceLineNo">225</span> return f.build().toByteArray();<a name="line.225"></a> +<span class="sourceLineNo">226</span> }<a name="line.226"></a> +<span class="sourceLineNo">227</span><a name="line.227"></a> +<span class="sourceLineNo">228</span> // Place the regions round-robin across the racks picking one server from each<a name="line.228"></a> +<span class="sourceLineNo">229</span> // rack at a time. Start with a random rack, and a random server from every rack.<a name="line.229"></a> +<span class="sourceLineNo">230</span> // If a rack doesn't have enough servers it will go to the next rack and so on.<a name="line.230"></a> +<span class="sourceLineNo">231</span> // for choosing a primary.<a name="line.231"></a> +<span class="sourceLineNo">232</span> // For example, if 4 racks (r1 .. r4) with 8 servers (s1..s8) each, one possible<a name="line.232"></a> +<span class="sourceLineNo">233</span> // placement could be r2:s5, r3:s5, r4:s5, r1:s5, r2:s6, r3:s6..<a name="line.233"></a> +<span class="sourceLineNo">234</span> // If there were fewer servers in one rack, say r3, which had 3 servers, one possible<a name="line.234"></a> +<span class="sourceLineNo">235</span> // placement could be r2:s5, <skip-r3>, r4:s5, r1:s5, r2:s6, <skip-r3> ...<a name="line.235"></a> +<span class="sourceLineNo">236</span> // The regions should be distributed proportionately to the racksizes<a name="line.236"></a> +<span class="sourceLineNo">237</span> public void placePrimaryRSAsRoundRobin(Map<ServerName, List<RegionInfo>> assignmentMap,<a name="line.237"></a> +<span class="sourceLineNo">238</span> Map<RegionInfo, ServerName> primaryRSMap, List<RegionInfo> regions) {<a name="line.238"></a> +<span class="sourceLineNo">239</span> List<String> rackList = new ArrayList<>(rackToRegionServerMap.size());<a name="line.239"></a> +<span class="sourceLineNo">240</span> rackList.addAll(rackToRegionServerMap.keySet());<a name="line.240"></a> +<span class="sourceLineNo">241</span> int rackIndex = random.nextInt(rackList.size());<a name="line.241"></a> +<span class="sourceLineNo">242</span> int maxRackSize = 0;<a name="line.242"></a> +<span class="sourceLineNo">243</span> for (Map.Entry<String,List<ServerName>> r : rackToRegionServerMap.entrySet()) {<a name="line.243"></a> +<span class="sourceLineNo">244</span> if (r.getValue().size() > maxRackSize) {<a name="line.244"></a> +<span class="sourceLineNo">245</span> maxRackSize = r.getValue().size();<a name="line.245"></a> +<span class="sourceLineNo">246</span> }<a name="line.246"></a> +<span class="sourceLineNo">247</span> }<a name="line.247"></a> +<span class="sourceLineNo">248</span> int numIterations = 0;<a name="line.248"></a> +<span class="sourceLineNo">249</span> // Initialize the current processing host index.<a name="line.249"></a> +<span class="sourceLineNo">250</span> int serverIndex = random.nextInt(maxRackSize);<a name="line.250"></a> +<span class="sourceLineNo">251</span> for (RegionInfo regionInfo : regions) {<a name="line.251"></a> +<span class="sourceLineNo">252</span> List<ServerName> currentServerList;<a name="line.252"></a> +<span class="sourceLineNo">253</span> String rackName;<a name="line.253"></a> +<span class="sourceLineNo">254</span> while (true) {<a name="line.254"></a> +<span class="sourceLineNo">255</span> rackName = rackList.get(rackIndex);<a name="line.255"></a> +<span class="sourceLineNo">256</span> numIterations++;<a name="line.256"></a> +<span class="sourceLineNo">257</span> // Get the server list for the current rack<a name="line.257"></a> +<span class="sourceLineNo">258</span> currentServerList = rackToRegionServerMap.get(rackName);<a name="line.258"></a> +<span class="sourceLineNo">259</span><a name="line.259"></a> +<span class="sourceLineNo">260</span> if (serverIndex >= currentServerList.size()) { //not enough machines in this rack<a name="line.260"></a> +<span class="sourceLineNo">261</span> if (numIterations % rackList.size() == 0) {<a name="line.261"></a> +<span class="sourceLineNo">262</span> if (++serverIndex >= maxRackSize) serverIndex = 0;<a name="line.262"></a> +<span class="sourceLineNo">263</span> }<a name="line.263"></a> +<span class="sourceLineNo">264</span> if ((++rackIndex) >= rackList.size()) {<a name="line.264"></a> +<span class="sourceLineNo">265</span> rackIndex = 0; // reset the rack index to 0<a name="line.265"></a> +<span class="sourceLineNo">266</span> }<a name="line.266"></a> +<span class="sourceLineNo">267</span> } else break;<a name="line.267"></a> +<span class="sourceLineNo">268</span> }<a name="line.268"></a> +<span class="sourceLineNo">269</span><a name="line.269"></a> +<span class="sourceLineNo">270</span> // Get the current process region server<a name="line.270"></a> +<span class="sourceLineNo">271</span> ServerName currentServer = currentServerList.get(serverIndex);<a name="line.271"></a> +<span class="sourceLineNo">272</span><a name="line.272"></a> +<span class="sourceLineNo">273</span> // Place the current region with the current primary region server<a name="line.273"></a> +<span class="sourceLineNo">274</span> primaryRSMap.put(regionInfo, currentServer);<a name="line.274"></a> +<span class="sourceLineNo">275</span> if (assignmentMap != null) {<a name="line.275"></a> +<span class="sourceLineNo">276</span> List<RegionInfo> regionsForServer = assignmentMap.get(currentServer);<a name="line.276"></a> +<span class="sourceLineNo">277</span> if (regionsForServer == null) {<a name="line.277"></a> +<span class="sourceLineNo">278</span> regionsForServer = new ArrayList<>();<a name="line.278"></a> +<span class="sourceLineNo">279</span> assignmentMap.put(currentServer, regionsForServer);<a name="line.279"></a> +<span class="sourceLineNo">280</span> }<a name="line.280"></a> +<span class="sourceLineNo">281</span> regionsForServer.add(regionInfo);<a name="line.281"></a> +<span class="sourceLineNo">282</span> }<a name="line.282"></a> +<span class="sourceLineNo">283</span><a name="line.283"></a> +<span class="sourceLineNo">284</span> // Set the next processing index<a name="line.284"></a> +<span class="sourceLineNo">285</span> if (numIterations % rackList.size() == 0) {<a name="line.285"></a> +<span class="sourceLineNo">286</span> ++serverIndex;<a name="line.286"></a> +<span class="sourceLineNo">287</span> }<a name="line.287"></a> +<span class="sourceLineNo">288</span> if ((++rackIndex) >= rackList.size()) {<a name="line.288"></a> +<span class="sourceLineNo">289</span> rackIndex = 0; // reset the rack index to 0<a name="line.289"></a> +<span class="sourceLineNo">290</span> }<a name="line.290"></a> +<span class="sourceLineNo">291</span> }<a name="line.291"></a> +<span class="sourceLineNo">292</span> }<a name="line.292"></a> +<span class="sourceLineNo">293</span><a name="line.293"></a> +<span class="sourceLineNo">294</span> public Map<RegionInfo, ServerName[]> placeSecondaryAndTertiaryRS(<a name="line.294"></a> +<span class="sourceLineNo">295</span> Map<RegionInfo, ServerName> primaryRSMap) {<a name="line.295"></a> +<span class="sourceLineNo">296</span> Map<RegionInfo, ServerName[]> secondaryAndTertiaryMap = new HashMap<>();<a name="line.296"></a> +<span class="sourceLineNo">297</span> for (Map.Entry<RegionInfo, ServerName> entry : primaryRSMap.entrySet()) {<a name="line.297"></a> +<span class="sourceLineNo">298</span> // Get the target region and its primary region server rack<a name="line.298"></a> +<span class="sourceLineNo">299</span> RegionInfo regionInfo = entry.getKey();<a name="line.299"></a> +<span class="sourceLineNo">300</span> ServerName primaryRS = entry.getValue();<a name="line.300"></a> +<span class="sourceLineNo">301</span> try {<a name="line.301"></a> +<span class="sourceLineNo">302</span> // Create the secondary and tertiary region server pair object.<a name="line.302"></a> +<span class="sourceLineNo">303</span> ServerName[] favoredNodes = getSecondaryAndTertiary(regionInfo, primaryRS);<a name="line.303"></a> +<span class="sourceLineNo">304</span> if (favoredNodes != null) {<a name="line.304"></a> +<span class="sourceLineNo">305</span> secondaryAndTertiaryMap.put(regionInfo, favoredNodes);<a name="line.305"></a> +<span class="sourceLineNo">306</span> LOG.debug("Place the secondary and tertiary region server for region "<a name="line.306"></a> +<span class="sourceLineNo">307</span> + regionInfo.getRegionNameAsString());<a name="line.307"></a> +<span class="sourceLineNo">308</span> }<a name="line.308"></a> +<span class="sourceLineNo">309</span> } catch (Exception e) {<a name="line.309"></a> +<span class="sourceLineNo">310</span> LOG.warn("Cannot place the favored nodes for region " +<a name="line.310"></a> +<span class="sourceLineNo">311</span> regionInfo.getRegionNameAsString() + " because " + e, e);<a name="line.311"></a> +<span class="sourceLineNo">312</span> continue;<a name="line.312"></a> +<span class="sourceLineNo">313</span> }<a name="line.313"></a> +<span class="sourceLineNo">314</span> }<a name="line.314"></a> +<span class="sourceLineNo">315</span> return secondaryAndTertiaryMap;<a name="line.315"></a> +<span class="sourceLineNo">316</span> }<a name="line.316"></a> +<span class="sourceLineNo">317</span><a name="line.317"></a> +<span class="sourceLineNo">318</span> public ServerName[] getSecondaryAndTertiary(RegionInfo regionInfo, ServerName primaryRS)<a name="line.318"></a> +<span class="sourceLineNo">319</span> throws IOException {<a name="line.319"></a> +<span class="sourceLineNo">320</span><a name="line.320"></a> +<span class="sourceLineNo">321</span> ServerName[] favoredNodes;// Get the rack for the primary region server<a name=
<TRUNCATED>
