http://git-wip-us.apache.org/repos/asf/hbase-site/blob/33bc9e06/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.Cluster.Action.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.Cluster.Action.html b/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.Cluster.Action.html index d9c59a0..13f64df 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.Cluster.Action.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.Cluster.Action.html @@ -69,1532 +69,1492 @@ <span class="sourceLineNo">061</span>import org.apache.hadoop.hbase.shaded.com.google.common.collect.ArrayListMultimap;<a name="line.61"></a> <span class="sourceLineNo">062</span>import org.apache.hadoop.hbase.shaded.com.google.common.collect.Lists;<a name="line.62"></a> <span class="sourceLineNo">063</span>import org.apache.hadoop.hbase.shaded.com.google.common.collect.Sets;<a name="line.63"></a> -<span class="sourceLineNo">064</span><a name="line.64"></a> -<span class="sourceLineNo">065</span>/**<a name="line.65"></a> -<span class="sourceLineNo">066</span> * The base class for load balancers. It provides the the functions used to by<a name="line.66"></a> -<span class="sourceLineNo">067</span> * {@link org.apache.hadoop.hbase.master.assignment.AssignmentManager} to assign regions<a name="line.67"></a> -<span class="sourceLineNo">068</span> * in the edge cases. It doesn't provide an implementation of the<a name="line.68"></a> -<span class="sourceLineNo">069</span> * actual balancing algorithm.<a name="line.69"></a> -<span class="sourceLineNo">070</span> *<a name="line.70"></a> -<span class="sourceLineNo">071</span> */<a name="line.71"></a> -<span class="sourceLineNo">072</span>public abstract class BaseLoadBalancer implements LoadBalancer {<a name="line.72"></a> -<span class="sourceLineNo">073</span> protected static final int MIN_SERVER_BALANCE = 2;<a name="line.73"></a> -<span class="sourceLineNo">074</span> private volatile boolean stopped = false;<a name="line.74"></a> -<span class="sourceLineNo">075</span><a name="line.75"></a> -<span class="sourceLineNo">076</span> private static final List<HRegionInfo> EMPTY_REGION_LIST = new ArrayList<>(0);<a name="line.76"></a> -<span class="sourceLineNo">077</span><a name="line.77"></a> -<span class="sourceLineNo">078</span> static final Predicate<ServerLoad> IDLE_SERVER_PREDICATOR<a name="line.78"></a> -<span class="sourceLineNo">079</span> = load -> load.getNumberOfRegions() == 0;<a name="line.79"></a> -<span class="sourceLineNo">080</span><a name="line.80"></a> -<span class="sourceLineNo">081</span> protected final RegionLocationFinder regionFinder = new RegionLocationFinder();<a name="line.81"></a> -<span class="sourceLineNo">082</span><a name="line.82"></a> -<span class="sourceLineNo">083</span> private static class DefaultRackManager extends RackManager {<a name="line.83"></a> -<span class="sourceLineNo">084</span> @Override<a name="line.84"></a> -<span class="sourceLineNo">085</span> public String getRack(ServerName server) {<a name="line.85"></a> -<span class="sourceLineNo">086</span> return UNKNOWN_RACK;<a name="line.86"></a> -<span class="sourceLineNo">087</span> }<a name="line.87"></a> -<span class="sourceLineNo">088</span> }<a name="line.88"></a> -<span class="sourceLineNo">089</span><a name="line.89"></a> -<span class="sourceLineNo">090</span> /**<a name="line.90"></a> -<span class="sourceLineNo">091</span> * The constructor that uses the basic MetricsBalancer<a name="line.91"></a> -<span class="sourceLineNo">092</span> */<a name="line.92"></a> -<span class="sourceLineNo">093</span> protected BaseLoadBalancer() {<a name="line.93"></a> -<span class="sourceLineNo">094</span> metricsBalancer = new MetricsBalancer();<a name="line.94"></a> -<span class="sourceLineNo">095</span> }<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> * This Constructor accepts an instance of MetricsBalancer,<a name="line.98"></a> -<span class="sourceLineNo">099</span> * which will be used instead of creating a new one<a name="line.99"></a> -<span class="sourceLineNo">100</span> */<a name="line.100"></a> -<span class="sourceLineNo">101</span> protected BaseLoadBalancer(MetricsBalancer metricsBalancer) {<a name="line.101"></a> -<span class="sourceLineNo">102</span> this.metricsBalancer = (metricsBalancer != null) ? metricsBalancer : new MetricsBalancer();<a name="line.102"></a> -<span class="sourceLineNo">103</span> }<a name="line.103"></a> -<span class="sourceLineNo">104</span><a name="line.104"></a> -<span class="sourceLineNo">105</span> /**<a name="line.105"></a> -<span class="sourceLineNo">106</span> * An efficient array based implementation similar to ClusterState for keeping<a name="line.106"></a> -<span class="sourceLineNo">107</span> * the status of the cluster in terms of region assignment and distribution.<a name="line.107"></a> -<span class="sourceLineNo">108</span> * LoadBalancers, such as StochasticLoadBalancer uses this Cluster object because of<a name="line.108"></a> -<span class="sourceLineNo">109</span> * hundreds of thousands of hashmap manipulations are very costly, which is why this<a name="line.109"></a> -<span class="sourceLineNo">110</span> * class uses mostly indexes and arrays.<a name="line.110"></a> -<span class="sourceLineNo">111</span> *<a name="line.111"></a> -<span class="sourceLineNo">112</span> * Cluster tracks a list of unassigned regions, region assignments, and the server<a name="line.112"></a> -<span class="sourceLineNo">113</span> * topology in terms of server names, hostnames and racks.<a name="line.113"></a> -<span class="sourceLineNo">114</span> */<a name="line.114"></a> -<span class="sourceLineNo">115</span> protected static class Cluster {<a name="line.115"></a> -<span class="sourceLineNo">116</span> ServerName[] servers;<a name="line.116"></a> -<span class="sourceLineNo">117</span> String[] hosts; // ServerName uniquely identifies a region server. multiple RS can run on the same host<a name="line.117"></a> -<span class="sourceLineNo">118</span> String[] racks;<a name="line.118"></a> -<span class="sourceLineNo">119</span> boolean multiServersPerHost = false; // whether or not any host has more than one server<a name="line.119"></a> -<span class="sourceLineNo">120</span><a name="line.120"></a> -<span class="sourceLineNo">121</span> ArrayList<String> tables;<a name="line.121"></a> -<span class="sourceLineNo">122</span> HRegionInfo[] regions;<a name="line.122"></a> -<span class="sourceLineNo">123</span> Deque<BalancerRegionLoad>[] regionLoads;<a name="line.123"></a> -<span class="sourceLineNo">124</span> private RegionLocationFinder regionFinder;<a name="line.124"></a> -<span class="sourceLineNo">125</span><a name="line.125"></a> -<span class="sourceLineNo">126</span> int[][] regionLocations; //regionIndex -> list of serverIndex sorted by locality<a name="line.126"></a> -<span class="sourceLineNo">127</span><a name="line.127"></a> -<span class="sourceLineNo">128</span> int[] serverIndexToHostIndex; //serverIndex -> host index<a name="line.128"></a> -<span class="sourceLineNo">129</span> int[] serverIndexToRackIndex; //serverIndex -> rack index<a name="line.129"></a> -<span class="sourceLineNo">130</span><a name="line.130"></a> -<span class="sourceLineNo">131</span> int[][] regionsPerServer; //serverIndex -> region list<a name="line.131"></a> -<span class="sourceLineNo">132</span> int[][] regionsPerHost; //hostIndex -> list of regions<a name="line.132"></a> -<span class="sourceLineNo">133</span> int[][] regionsPerRack; //rackIndex -> region list<a name="line.133"></a> -<span class="sourceLineNo">134</span> int[][] primariesOfRegionsPerServer; //serverIndex -> sorted list of regions by primary region index<a name="line.134"></a> -<span class="sourceLineNo">135</span> int[][] primariesOfRegionsPerHost; //hostIndex -> sorted list of regions by primary region index<a name="line.135"></a> -<span class="sourceLineNo">136</span> int[][] primariesOfRegionsPerRack; //rackIndex -> sorted list of regions by primary region index<a name="line.136"></a> -<span class="sourceLineNo">137</span><a name="line.137"></a> -<span class="sourceLineNo">138</span> int[][] serversPerHost; //hostIndex -> list of server indexes<a name="line.138"></a> -<span class="sourceLineNo">139</span> int[][] serversPerRack; //rackIndex -> list of server indexes<a name="line.139"></a> -<span class="sourceLineNo">140</span> int[] regionIndexToServerIndex; //regionIndex -> serverIndex<a name="line.140"></a> -<span class="sourceLineNo">141</span> int[] initialRegionIndexToServerIndex; //regionIndex -> serverIndex (initial cluster state)<a name="line.141"></a> -<span class="sourceLineNo">142</span> int[] regionIndexToTableIndex; //regionIndex -> tableIndex<a name="line.142"></a> -<span class="sourceLineNo">143</span> int[][] numRegionsPerServerPerTable; //serverIndex -> tableIndex -> # regions<a name="line.143"></a> -<span class="sourceLineNo">144</span> int[] numMaxRegionsPerTable; //tableIndex -> max number of regions in a single RS<a name="line.144"></a> -<span class="sourceLineNo">145</span> int[] regionIndexToPrimaryIndex; //regionIndex -> regionIndex of the primary<a name="line.145"></a> -<span class="sourceLineNo">146</span> boolean hasRegionReplicas = false; //whether there is regions with replicas<a name="line.146"></a> -<span class="sourceLineNo">147</span><a name="line.147"></a> -<span class="sourceLineNo">148</span> Integer[] serverIndicesSortedByRegionCount;<a name="line.148"></a> -<span class="sourceLineNo">149</span> Integer[] serverIndicesSortedByLocality;<a name="line.149"></a> -<span class="sourceLineNo">150</span><a name="line.150"></a> -<span class="sourceLineNo">151</span> Map<String, Integer> serversToIndex;<a name="line.151"></a> -<span class="sourceLineNo">152</span> Map<String, Integer> hostsToIndex;<a name="line.152"></a> -<span class="sourceLineNo">153</span> Map<String, Integer> racksToIndex;<a name="line.153"></a> -<span class="sourceLineNo">154</span> Map<String, Integer> tablesToIndex;<a name="line.154"></a> -<span class="sourceLineNo">155</span> Map<HRegionInfo, Integer> regionsToIndex;<a name="line.155"></a> -<span class="sourceLineNo">156</span> float[] localityPerServer;<a name="line.156"></a> -<span class="sourceLineNo">157</span><a name="line.157"></a> -<span class="sourceLineNo">158</span> int numServers;<a name="line.158"></a> -<span class="sourceLineNo">159</span> int numHosts;<a name="line.159"></a> -<span class="sourceLineNo">160</span> int numRacks;<a name="line.160"></a> -<span class="sourceLineNo">161</span> int numTables;<a name="line.161"></a> -<span class="sourceLineNo">162</span> int numRegions;<a name="line.162"></a> -<span class="sourceLineNo">163</span><a name="line.163"></a> -<span class="sourceLineNo">164</span> int numMovedRegions = 0; //num moved regions from the initial configuration<a name="line.164"></a> -<span class="sourceLineNo">165</span> Map<ServerName, List<HRegionInfo>> clusterState;<a name="line.165"></a> -<span class="sourceLineNo">166</span><a name="line.166"></a> -<span class="sourceLineNo">167</span> protected final RackManager rackManager;<a name="line.167"></a> -<span class="sourceLineNo">168</span> // Maps region -> rackIndex -> locality of region on rack<a name="line.168"></a> -<span class="sourceLineNo">169</span> private float[][] rackLocalities;<a name="line.169"></a> -<span class="sourceLineNo">170</span> // Maps localityType -> region -> [server|rack]Index with highest locality<a name="line.170"></a> -<span class="sourceLineNo">171</span> private int[][] regionsToMostLocalEntities;<a name="line.171"></a> -<span class="sourceLineNo">172</span><a name="line.172"></a> -<span class="sourceLineNo">173</span> protected Cluster(<a name="line.173"></a> -<span class="sourceLineNo">174</span> Map<ServerName, List<HRegionInfo>> clusterState,<a name="line.174"></a> -<span class="sourceLineNo">175</span> Map<String, Deque<BalancerRegionLoad>> loads,<a name="line.175"></a> -<span class="sourceLineNo">176</span> RegionLocationFinder regionFinder,<a name="line.176"></a> -<span class="sourceLineNo">177</span> RackManager rackManager) {<a name="line.177"></a> -<span class="sourceLineNo">178</span> this(null, clusterState, loads, regionFinder, rackManager);<a name="line.178"></a> -<span class="sourceLineNo">179</span> }<a name="line.179"></a> -<span class="sourceLineNo">180</span><a name="line.180"></a> -<span class="sourceLineNo">181</span> @SuppressWarnings("unchecked")<a name="line.181"></a> -<span class="sourceLineNo">182</span> protected Cluster(<a name="line.182"></a> -<span class="sourceLineNo">183</span> Collection<HRegionInfo> unassignedRegions,<a name="line.183"></a> -<span class="sourceLineNo">184</span> Map<ServerName, List<HRegionInfo>> clusterState,<a name="line.184"></a> -<span class="sourceLineNo">185</span> Map<String, Deque<BalancerRegionLoad>> loads,<a name="line.185"></a> -<span class="sourceLineNo">186</span> RegionLocationFinder regionFinder,<a name="line.186"></a> -<span class="sourceLineNo">187</span> RackManager rackManager) {<a name="line.187"></a> -<span class="sourceLineNo">188</span><a name="line.188"></a> -<span class="sourceLineNo">189</span> if (unassignedRegions == null) {<a name="line.189"></a> -<span class="sourceLineNo">190</span> unassignedRegions = EMPTY_REGION_LIST;<a name="line.190"></a> -<span class="sourceLineNo">191</span> }<a name="line.191"></a> -<span class="sourceLineNo">192</span><a name="line.192"></a> -<span class="sourceLineNo">193</span> serversToIndex = new HashMap<>();<a name="line.193"></a> -<span class="sourceLineNo">194</span> hostsToIndex = new HashMap<>();<a name="line.194"></a> -<span class="sourceLineNo">195</span> racksToIndex = new HashMap<>();<a name="line.195"></a> -<span class="sourceLineNo">196</span> tablesToIndex = new HashMap<>();<a name="line.196"></a> -<span class="sourceLineNo">197</span><a name="line.197"></a> -<span class="sourceLineNo">198</span> //TODO: We should get the list of tables from master<a name="line.198"></a> -<span class="sourceLineNo">199</span> tables = new ArrayList<>();<a name="line.199"></a> -<span class="sourceLineNo">200</span> this.rackManager = rackManager != null ? rackManager : new DefaultRackManager();<a name="line.200"></a> -<span class="sourceLineNo">201</span><a name="line.201"></a> -<span class="sourceLineNo">202</span> numRegions = 0;<a name="line.202"></a> -<span class="sourceLineNo">203</span><a name="line.203"></a> -<span class="sourceLineNo">204</span> List<List<Integer>> serversPerHostList = new ArrayList<>();<a name="line.204"></a> -<span class="sourceLineNo">205</span> List<List<Integer>> serversPerRackList = new ArrayList<>();<a name="line.205"></a> -<span class="sourceLineNo">206</span> this.clusterState = clusterState;<a name="line.206"></a> -<span class="sourceLineNo">207</span> this.regionFinder = regionFinder;<a name="line.207"></a> -<span class="sourceLineNo">208</span><a name="line.208"></a> -<span class="sourceLineNo">209</span> // Use servername and port as there can be dead servers in this list. We want everything with<a name="line.209"></a> -<span class="sourceLineNo">210</span> // a matching hostname and port to have the same index.<a name="line.210"></a> -<span class="sourceLineNo">211</span> for (ServerName sn : clusterState.keySet()) {<a name="line.211"></a> -<span class="sourceLineNo">212</span> if (sn == null) {<a name="line.212"></a> -<span class="sourceLineNo">213</span> LOG.warn("TODO: Enable TRACE on BaseLoadBalancer. Empty servername); " +<a name="line.213"></a> -<span class="sourceLineNo">214</span> "skipping; unassigned regions?");<a name="line.214"></a> -<span class="sourceLineNo">215</span> if (LOG.isTraceEnabled()) {<a name="line.215"></a> -<span class="sourceLineNo">216</span> LOG.trace("EMPTY SERVERNAME " + clusterState.toString());<a name="line.216"></a> -<span class="sourceLineNo">217</span> }<a name="line.217"></a> -<span class="sourceLineNo">218</span> continue;<a name="line.218"></a> -<span class="sourceLineNo">219</span> }<a name="line.219"></a> -<span class="sourceLineNo">220</span> if (serversToIndex.get(sn.getAddress().toString()) == null) {<a name="line.220"></a> -<span class="sourceLineNo">221</span> serversToIndex.put(sn.getHostAndPort(), numServers++);<a name="line.221"></a> -<span class="sourceLineNo">222</span> }<a name="line.222"></a> -<span class="sourceLineNo">223</span> if (!hostsToIndex.containsKey(sn.getHostname())) {<a name="line.223"></a> -<span class="sourceLineNo">224</span> hostsToIndex.put(sn.getHostname(), numHosts++);<a name="line.224"></a> -<span class="sourceLineNo">225</span> serversPerHostList.add(new ArrayList<>(1));<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> int serverIndex = serversToIndex.get(sn.getHostAndPort());<a name="line.228"></a> -<span class="sourceLineNo">229</span> int hostIndex = hostsToIndex.get(sn.getHostname());<a name="line.229"></a> -<span class="sourceLineNo">230</span> serversPerHostList.get(hostIndex).add(serverIndex);<a name="line.230"></a> -<span class="sourceLineNo">231</span><a name="line.231"></a> -<span class="sourceLineNo">232</span> String rack = this.rackManager.getRack(sn);<a name="line.232"></a> -<span class="sourceLineNo">233</span> if (!racksToIndex.containsKey(rack)) {<a name="line.233"></a> -<span class="sourceLineNo">234</span> racksToIndex.put(rack, numRacks++);<a name="line.234"></a> -<span class="sourceLineNo">235</span> serversPerRackList.add(new ArrayList<>());<a name="line.235"></a> -<span class="sourceLineNo">236</span> }<a name="line.236"></a> -<span class="sourceLineNo">237</span> int rackIndex = racksToIndex.get(rack);<a name="line.237"></a> -<span class="sourceLineNo">238</span> serversPerRackList.get(rackIndex).add(serverIndex);<a name="line.238"></a> -<span class="sourceLineNo">239</span> }<a name="line.239"></a> -<span class="sourceLineNo">240</span><a name="line.240"></a> -<span class="sourceLineNo">241</span> // Count how many regions there are.<a name="line.241"></a> -<span class="sourceLineNo">242</span> for (Entry<ServerName, List<HRegionInfo>> entry : clusterState.entrySet()) {<a name="line.242"></a> -<span class="sourceLineNo">243</span> numRegions += entry.getValue().size();<a name="line.243"></a> -<span class="sourceLineNo">244</span> }<a name="line.244"></a> -<span class="sourceLineNo">245</span> numRegions += unassignedRegions.size();<a name="line.245"></a> -<span class="sourceLineNo">246</span><a name="line.246"></a> -<span class="sourceLineNo">247</span> regionsToIndex = new HashMap<>(numRegions);<a name="line.247"></a> -<span class="sourceLineNo">248</span> servers = new ServerName[numServers];<a name="line.248"></a> -<span class="sourceLineNo">249</span> serversPerHost = new int[numHosts][];<a name="line.249"></a> -<span class="sourceLineNo">250</span> serversPerRack = new int[numRacks][];<a name="line.250"></a> -<span class="sourceLineNo">251</span> regions = new HRegionInfo[numRegions];<a name="line.251"></a> -<span class="sourceLineNo">252</span> regionIndexToServerIndex = new int[numRegions];<a name="line.252"></a> -<span class="sourceLineNo">253</span> initialRegionIndexToServerIndex = new int[numRegions];<a name="line.253"></a> -<span class="sourceLineNo">254</span> regionIndexToTableIndex = new int[numRegions];<a name="line.254"></a> -<span class="sourceLineNo">255</span> regionIndexToPrimaryIndex = new int[numRegions];<a name="line.255"></a> -<span class="sourceLineNo">256</span> regionLoads = new Deque[numRegions];<a name="line.256"></a> -<span class="sourceLineNo">257</span><a name="line.257"></a> -<span class="sourceLineNo">258</span> regionLocations = new int[numRegions][];<a name="line.258"></a> -<span class="sourceLineNo">259</span> serverIndicesSortedByRegionCount = new Integer[numServers];<a name="line.259"></a> -<span class="sourceLineNo">260</span> serverIndicesSortedByLocality = new Integer[numServers];<a name="line.260"></a> -<span class="sourceLineNo">261</span> localityPerServer = new float[numServers];<a name="line.261"></a> -<span class="sourceLineNo">262</span><a name="line.262"></a> -<span class="sourceLineNo">263</span> serverIndexToHostIndex = new int[numServers];<a name="line.263"></a> -<span class="sourceLineNo">264</span> serverIndexToRackIndex = new int[numServers];<a name="line.264"></a> -<span class="sourceLineNo">265</span> regionsPerServer = new int[numServers][];<a name="line.265"></a> -<span class="sourceLineNo">266</span> regionsPerHost = new int[numHosts][];<a name="line.266"></a> -<span class="sourceLineNo">267</span> regionsPerRack = new int[numRacks][];<a name="line.267"></a> -<span class="sourceLineNo">268</span> primariesOfRegionsPerServer = new int[numServers][];<a name="line.268"></a> -<span class="sourceLineNo">269</span> primariesOfRegionsPerHost = new int[numHosts][];<a name="line.269"></a> -<span class="sourceLineNo">270</span> primariesOfRegionsPerRack = new int[numRacks][];<a name="line.270"></a> -<span class="sourceLineNo">271</span><a name="line.271"></a> -<span class="sourceLineNo">272</span> int tableIndex = 0, regionIndex = 0, regionPerServerIndex = 0;<a name="line.272"></a> -<span class="sourceLineNo">273</span><a name="line.273"></a> -<span class="sourceLineNo">274</span> for (Entry<ServerName, List<HRegionInfo>> entry : clusterState.entrySet()) {<a name="line.274"></a> -<span class="sourceLineNo">275</span> if (entry.getKey() == null) {<a name="line.275"></a> -<span class="sourceLineNo">276</span> LOG.warn("SERVERNAME IS NULL, skipping " + entry.getValue());<a name="line.276"></a> -<span class="sourceLineNo">277</span> continue;<a name="line.277"></a> -<span class="sourceLineNo">278</span> }<a name="line.278"></a> -<span class="sourceLineNo">279</span> int serverIndex = serversToIndex.get(entry.getKey().getHostAndPort());<a name="line.279"></a> -<span class="sourceLineNo">280</span><a name="line.280"></a> -<span class="sourceLineNo">281</span> // keep the servername if this is the first server name for this hostname<a name="line.281"></a> -<span class="sourceLineNo">282</span> // or this servername has the newest startcode.<a name="line.282"></a> -<span class="sourceLineNo">283</span> if (servers[serverIndex] == null ||<a name="line.283"></a> -<span class="sourceLineNo">284</span> servers[serverIndex].getStartcode() < entry.getKey().getStartcode()) {<a name="line.284"></a> -<span class="sourceLineNo">285</span> servers[serverIndex] = entry.getKey();<a name="line.285"></a> -<span class="sourceLineNo">286</span> }<a name="line.286"></a> -<span class="sourceLineNo">287</span><a name="line.287"></a> -<span class="sourceLineNo">288</span> if (regionsPerServer[serverIndex] != null) {<a name="line.288"></a> -<span class="sourceLineNo">289</span> // there is another server with the same hostAndPort in ClusterState.<a name="line.289"></a> -<span class="sourceLineNo">290</span> // allocate the array for the total size<a name="line.290"></a> -<span class="sourceLineNo">291</span> regionsPerServer[serverIndex] = new int[entry.getValue().size() + regionsPerServer[serverIndex].length];<a name="line.291"></a> -<span class="sourceLineNo">292</span> } else {<a name="line.292"></a> -<span class="sourceLineNo">293</span> regionsPerServer[serverIndex] = new int[entry.getValue().size()];<a name="line.293"></a> -<span class="sourceLineNo">294</span> }<a name="line.294"></a> -<span class="sourceLineNo">295</span> primariesOfRegionsPerServer[serverIndex] = new int[regionsPerServer[serverIndex].length];<a name="line.295"></a> -<span class="sourceLineNo">296</span> serverIndicesSortedByRegionCount[serverIndex] = serverIndex;<a name="line.296"></a> -<span class="sourceLineNo">297</span> serverIndicesSortedByLocality[serverIndex] = serverIndex;<a name="line.297"></a> -<span class="sourceLineNo">298</span> }<a name="line.298"></a> -<span class="sourceLineNo">299</span><a name="line.299"></a> -<span class="sourceLineNo">300</span> hosts = new String[numHosts];<a name="line.300"></a> -<span class="sourceLineNo">301</span> for (Entry<String, Integer> entry : hostsToIndex.entrySet()) {<a name="line.301"></a> -<span class="sourceLineNo">302</span> hosts[entry.getValue()] = entry.getKey();<a name="line.302"></a> -<span class="sourceLineNo">303</span> 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Too disruptive to change now")<a name="line.688"></a> -<span class="sourceLineNo">689</span> public static final Action NullAction = new Action(Type.NULL);<a name="line.689"></a> -<span class="sourceLineNo">690</span><a name="line.690"></a> -<span class="sourceLineNo">691</span> public void doAction(Action action) {<a name="line.691"></a> -<span class="sourceLineNo">692</span> switch (action.type) {<a name="line.692"></a> -<span class="sourceLineNo">693</span> case NULL: break;<a name="line.693"></a> -<span class="sourceLineNo">694</span> case ASSIGN_REGION:<a name="line.694"></a> -<span class="sourceLineNo">695</span> // FindBugs: Having the assert quietens FB BC_UNCONFIRMED_CAST warnings<a name="line.695"></a> -<span class="sourceLineNo">696</span> assert action instanceof AssignRegionAction: action.getClass();<a name="line.696"></a> -<span class="sourceLineNo">697</span> AssignRegionAction ar = (AssignRegionAction) action;<a name="line.697"></a> -<span class="sourceLineNo">698</span> regionsPerServer[ar.server] = addRegion(regionsPerServer[ar.server], ar.region);<a name="line.698"></a> -<span class="sourceLineNo">699</span> regionMoved(ar.region, -1, ar.server);<a name="line.699"></a> -<span class="sourceLineNo">700</span> break;<a name="line.700"></a> -<span class="sourceLineNo">701</span> case MOVE_REGION:<a name="line.701"></a> -<span class="sourceLineNo">702</span> assert action instanceof MoveRegionAction: action.getClass();<a name="line.702"></a> -<span class="sourceLineNo">703</span> MoveRegionAction mra = (MoveRegionAction) action;<a name="line.703"></a> -<span class="sourceLineNo">704</span> regionsPerServer[mra.fromServer] = removeRegion(regionsPerServer[mra.fromServer], mra.region);<a name="line.704"></a> -<span class="sourceLineNo">705</span> regionsPerServer[mra.toServer] = addRegion(regionsPerServer[mra.toServer], mra.region);<a name="line.705"></a> -<span class="sourceLineNo">706</span> regionMoved(mra.region, mra.fromServer, mra.toServer);<a name="line.706"></a> -<span class="sourceLineNo">707</span> break;<a name="line.707"></a> -<span class="sourceLineNo">708</span> case SWAP_REGIONS:<a name="line.708"></a> -<span class="sourceLineNo">709</span> assert action instanceof SwapRegionsAction: action.getClass();<a name="line.709"></a> -<span class="sourceLineNo">710</span> SwapRegionsAction a = (SwapRegionsAction) action;<a name="line.710"></a> -<span class="sourceLineNo">711</span> regionsPerServer[a.fromServer] = replaceRegion(regionsPerServer[a.fromServer], a.fromRegion, a.toRegion);<a name="line.711"></a> -<span class="sourceLineNo">712</span> regionsPerServer[a.toServer] = replaceRegion(regionsPerServer[a.toServer], a.toRegion, a.fromRegion);<a name="line.712"></a> -<span class="sourceLineNo">713</span> regionMoved(a.fromRegion, a.fromServer, a.toServer);<a name="line.713"></a> -<span class="sourceLineNo">714</span> regionMoved(a.toRegion, a.toServer, a.fromServer);<a name="line.714"></a> -<span class="sourceLineNo">715</span> break;<a name="line.715"></a> -<span class="sourceLineNo">716</span> default:<a name="line.716"></a> -<span class="sourceLineNo">717</span> throw new RuntimeException("Uknown action:" + action.type);<a name="line.717"></a> -<span class="sourceLineNo">718</span> }<a name="line.718"></a> -<span class="sourceLineNo">719</span> }<a name="line.719"></a> -<span class="sourceLineNo">720</span><a name="line.720"></a> -<span class="sourceLineNo">721</span> /**<a name="line.721"></a> -<span class="sourceLineNo">722</span> * Return true if the placement of region on server would lower the availability<a name="line.722"></a> -<span class="sourceLineNo">723</span> * of the region in question<a name="line.723"></a> -<span class="sourceLineNo">724</span> * @return true or false<a name="line.724"></a> -<span class="sourceLineNo">725</span> */<a name="line.725"></a> -<span class="sourceLineNo">726</span> boolean wouldLowerAvailability(HRegionInfo regionInfo, ServerName serverName) {<a name="line.726"></a> -<span class="sourceLineNo">727</span> if (!serversToIndex.containsKey(serverName.getHostAndPort())) {<a name="line.727"></a> -<span class="sourceLineNo">728</span> return false; 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i < primariesOfRegionsPerServer.length; i++) {<a name="line.740"></a> -<span class="sourceLineNo">741</span> if (i != server && !contains(primariesOfRegionsPerServer[i], primary)) {<a name="line.741"></a> -<span class="sourceLineNo">742</span> return true; // meaning there is a better server<a name="line.742"></a> -<span class="sourceLineNo">743</span> }<a name="line.743"></a> -<span class="sourceLineNo">744</span> }<a name="line.744"></a> -<span class="sourceLineNo">745</span> return false; // there is not a better server to place this<a name="line.745"></a> -<span class="sourceLineNo">746</span> }<a name="line.746"></a> -<span class="sourceLineNo">747</span><a name="line.747"></a> -<span class="sourceLineNo">748</span> // check host<a name="line.748"></a> -<span class="sourceLineNo">749</span> if (multiServersPerHost) { // these arrays would only be allocated if we have more than one server per host<a name="line.749"></a> -<span class="sourceLineNo">750</span> int host = serverIndexToHostIndex[server];<a name="line.750"></a> -<span class="sourceLineNo">751</span> if (contains(primariesOfRegionsPerHost[host], primary)) {<a name="line.751"></a> -<span class="sourceLineNo">752</span> // check for whether there are other hosts that we can place this region<a name="line.752"></a> -<span class="sourceLineNo">753</span> for (int i = 0; i < primariesOfRegionsPerHost.length; i++) {<a name="line.753"></a> -<span class="sourceLineNo">754</span> if (i != host && !contains(primariesOfRegionsPerHost[i], primary)) {<a name="line.754"></a> -<span class="sourceLineNo">755</span> return true; // meaning there is a better host<a name="line.755"></a> -<span class="sourceLineNo">756</span> }<a name="line.756"></a> -<span class="sourceLineNo">757</span> }<a name="line.757"></a> -<span class="sourceLineNo">758</span> return false; // there is not a better host to place this<a name="line.758"></a> -<span class="sourceLineNo">759</span> }<a name="line.759"></a> -<span class="sourceLineNo">760</span> }<a name="line.760"></a> -<span class="sourceLineNo">761</span><a name="line.761"></a> -<span class="sourceLineNo">762</span> // check rack<a name="line.762"></a> -<span class="sourceLineNo">763</span> if (numRacks > 1) {<a name="line.763"></a> -<span class="sourceLineNo">764</span> int rack = serverIndexToRackIndex[server];<a name="line.764"></a> -<span class="sourceLineNo">765</span> if (contains(primariesOfRegionsPerRack[rack], primary)) {<a name="line.765"></a> -<span class="sourceLineNo">766</span> // check for whether there are other racks that we can place this region<a name="line.766"></a> -<span class="sourceLineNo">767</span> for (int i = 0; i < primariesOfRegionsPerRack.length; i++) {<a name="line.767"></a> -<span class="sourceLineNo">768</span> if (i != rack && !contains(primariesOfRegionsPerRack[i], primary)) {<a name="line.768"></a> -<span class="sourceLineNo">769</span> return true; // meaning there is a better rack<a name="line.769"></a> -<span class="sourceLineNo">770</span> }<a name="line.770"></a> -<span class="sourceLineNo">771</span> }<a name="line.771"></a> -<span class="sourceLineNo">772</span> return false; // there is not a better rack to place this<a name="line.772"></a> -<span class="sourceLineNo">773</span> }<a name="line.773"></a> -<span class="sourceLineNo">774</span> }<a name="line.774"></a> -<span class="sourceLineNo">775</span> return false;<a name="line.775"></a> -<span class="sourceLineNo">776</span> }<a name="line.776"></a> -<span class="sourceLineNo">777</span><a name="line.777"></a> -<span class="sourceLineNo">778</span> void doAssignRegion(HRegionInfo regionInfo, ServerName serverName) {<a name="line.778"></a> -<span class="sourceLineNo">779</span> if (!serversToIndex.containsKey(serverName.getHostAndPort())) {<a name="line.779"></a> -<span class="sourceLineNo">780</span> return;<a name="line.780"></a> -<span class="sourceLineNo">781</span> }<a name="line.781"></a> -<span class="sourceLineNo">782</span> int server = serversToIndex.get(serverName.getHostAndPort());<a name="line.782"></a> -<span class="sourceLineNo">783</span> int region = regionsToIndex.get(regionInfo);<a name="line.783"></a> -<span class="sourceLineNo">784</span> doAction(new AssignRegionAction(region, server));<a name="line.784"></a> -<span class="sourceLineNo">785</span> }<a name="line.785"></a> -<span class="sourceLineNo">786</span><a name="line.786"></a> -<span class="sourceLineNo">787</span> void regionMoved(int region, int oldServer, int newServer) {<a name="line.787"></a> -<span class="sourceLineNo">788</span> regionIndexToServerIndex[region] = newServer;<a name="line.788"></a> -<span class="sourceLineNo">789</span> if (initialRegionIndexToServerIndex[region] == newServer) {<a name="line.789"></a> -<span class="sourceLineNo">790</span> numMovedRegions--; 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// will still be sorted<a name="line.833"></a> -<span class="sourceLineNo">834</span> }<a name="line.834"></a> -<span class="sourceLineNo">835</span> }<a name="line.835"></a> -<span class="sourceLineNo">836</span> }<a name="line.836"></a> -<span class="sourceLineNo">837</span><a name="line.837"></a> -<span class="sourceLineNo">838</span> // update for racks<a name="line.838"></a> -<span class="sourceLineNo">839</span> if (numRacks > 1) {<a name="line.839"></a> -<span class="sourceLineNo">840</span> int oldRack = oldServer >= 0 ? serverIndexToRackIndex[oldServer] : -1;<a name="line.840"></a> -<span class="sourceLineNo">841</span> int newRack = serverIndexToRackIndex[newServer];<a name="line.841"></a> -<span class="sourceLineNo">842</span> if (newRack != oldRack) {<a name="line.842"></a> -<span class="sourceLineNo">843</span> regionsPerRack[newRack] = addRegion(regionsPerRack[newRack], region);<a name="line.843"></a> -<span class="sourceLineNo">844</span> primariesOfRegionsPerRack[newRack] = addRegionSorted(primariesOfRegionsPerRack[newRack], primary);<a name="line.844"></a> -<span class="sourceLineNo">845</span> if (oldRack >= 0) {<a name="line.845"></a> -<span class="sourceLineNo">846</span> regionsPerRack[oldRack] = removeRegion(regionsPerRack[oldRack], region);<a name="line.846"></a> -<span class="sourceLineNo">847</span> primariesOfRegionsPerRack[oldRack] = removeRegion(<a name="line.847"></a> -<span class="sourceLineNo">848</span> primariesOfRegionsPerRack[oldRack], primary); // will still be sorted<a name="line.848"></a> -<span class="sourceLineNo">849</span> }<a name="line.849"></a> -<span class="sourceLineNo">850</span> }<a name="line.850"></a> -<span class="sourceLineNo">851</span> }<a name="line.851"></a> -<span class="sourceLineNo">852</span> }<a name="line.852"></a> -<span class="sourceLineNo">853</span><a name="line.853"></a> -<span class="sourceLineNo">854</span> int[] removeRegion(int[] regions, int regionIndex) {<a name="line.854"></a> -<span class="sourceLineNo">855</span> //TODO: this maybe costly. Consider using linked lists<a name="line.855"></a> -<span class="sourceLineNo">856</span> int[] newRegions = new int[regions.length - 1];<a name="line.856"></a> -<span class="sourceLineNo">857</span> int i = 0;<a name="line.857"></a> -<span class="sourceLineNo">858</span> for (i = 0; i < regions.length; i++) {<a name="line.858"></a> -<span class="sourceLineNo">859</span> if (regions[i] == regionIndex) {<a name="line.859"></a> -<span class="sourceLineNo">860</span> break;<a name="line.860"></a> -<span class="sourceLineNo">861</span> }<a name="line.861"></a> -<span class="sourceLineNo">862</span> newRegions[i] = regions[i];<a name="line.862"></a> -<span class="sourceLineNo">863</span> }<a name="line.863"></a> -<span class="sourceLineNo">864</span> System.arraycopy(regions, i+1, newRegions, i, newRegions.length - i);<a name="line.864"></a> -<span class="sourceLineNo">865</span> return newRegions;<a name="line.865"></a> -<span class="sourceLineNo">866</span> }<a name="line.866"></a> -<span class="sourceLineNo">867</span><a name="line.867"></a> -<span class="sourceLineNo">868</span> int[] addRegion(int[] regions, int regionIndex) {<a name="line.868"></a> -<span class="sourceLineNo">869</span> int[] newRegions = new int[regions.length + 1];<a name="line.869"></a> -<span class="sourceLineNo">870</span> System.arraycopy(regions, 0, newRegions, 0, regions.length);<a name="line.870"></a> -<span class="sourceLineNo">871</span> newRegions[newRegions.length - 1] = regionIndex;<a name="line.871"></a> -<span class="sourceLineNo">872</span> return newRegions;<a name="line.872"></a> -<span class="sourceLineNo">873</span> }<a name="line.873"></a> -<span class="sourceLineNo">874</span><a name="line.874"></a> -<span class="sourceLineNo">875</span> int[] addRegionSorted(int[] regions, int regionIndex) {<a name="line.875"></a> -<span class="sourceLineNo">876</span> int[] newRegions = new int[regions.length + 1];<a name="line.876"></a> -<span class="sourceLineNo">877</span> int i = 0;<a name="line.877"></a> -<span class="sourceLineNo">878</span> for (i = 0; i < regions.length; i++) { // find the index to insert<a name="line.878"></a> -<span class="sourceLineNo">879</span> if (regions[i] > regionIndex) {<a name="line.879"></a> -<span class="sourceLineNo">880</span> break;<a name="line.880"></a> -<span class="sourceLineNo">881</span> }<a name="line.881"></a> -<span class="sourceLineNo">882</span> }<a name="line.882"></a> -<span class="sourceLineNo">883</span> System.arraycopy(regions, 0, newRegions, 0, i); // copy first half<a name="line.883"></a> -<span class="sourceLineNo">884</span> System.arraycopy(regions, i, newRegions, i+1, regions.length - i); // copy second half<a name="line.884"></a> -<span class="sourceLineNo">885</span> newRegions[i] = regionIndex;<a name="line.885"></a> -<span class="sourceLineNo">886</span><a name="line.886"></a> -<span class="sourceLineNo">887</span> return newRegions;<a name="line.887"></a> -<span class="sourceLineNo">888</span> }<a name="line.888"></a> -<span class="sourceLineNo">889</span><a name="line.889"></a> -<span class="sourceLineNo">890</span> int[] replaceRegion(int[] regions, int regionIndex, int newRegionIndex) {<a name="line.890"></a> -<span class="sourceLineNo">891</span> int i = 0;<a name="line.891"></a> -<span class="sourceLineNo">892</span> for (i = 0; i < regions.length; i++) {<a name="line.892"></a> -<span class="sourceLineNo">893</span> if (regions[i] == regionIndex) {<a name="line.893"></a> -<span class="sourceLineNo">894</span> regions[i] = newRegionIndex;<a name="line.894"></a> -<span class="sourceLineNo">895</span> break;<a name="line.895"></a> -<span class="sourceLineNo">896</span> }<a name="line.896"></a> -<span class="sourceLineNo">897</span> }<a name="line.897"></a> -<span class="sourceLineNo">898</span> return regions;<a name="line.898"></a> -<span class="sourceLineNo">899</span> }<a name="line.899"></a> -<span class="sourceLineNo">900</span><a name="line.900"></a> -<span class="sourceLineNo">901</span> void sortServersByRegionCount() {<a name="line.901"></a> -<span class="sourceLineNo">902</span> Arrays.sort(serverIndicesSortedByRegionCount, numRegionsComparator);<a name="line.902"></a> -<span class="sourceLineNo">903</span> }<a name="line.903"></a> -<span class="sourceLineNo">904</span><a name="line.904"></a> -<span class="sourceLineNo">905</span> int getNumRegions(int server) {<a name="line.905"></a> -<span class="sourceLineNo">906</span> return regionsPerServer[server].length;<a name="line.906"></a> -<span class="sourceLineNo">907</span> }<a name="line.907"></a> -<span class="sourceLineNo">908</span><a name="line.908"></a> -<span class="sourceLineNo">909</span> boolean contains(int[] arr, int val) {<a name="line.909"></a> -<span class="sourceLineNo">910</span> return Arrays.binarySearch(arr, val) >= 0;<a name="line.910"></a> -<span class="sourceLineNo">911</span> }<a name="line.911"></a> -<span class="sourceLineNo">912</span><a name="line.912"></a> -<span class="sourceLineNo">913</span> private Comparator<Integer> numRegionsComparator = Comparator.comparingInt(this::getNumRegions);<a name="line.913"></a> -<span class="sourceLineNo">914</span><a name="line.914"></a> -<span class="sourceLineNo">915</span> int getLowestLocalityRegionOnServer(int serverIndex) {<a name="line.915"></a> -<span class="sourceLineNo">916</span> if (regionFinder != null) {<a name="line.916"></a> -<span class="sourceLineNo">917</span> float lowestLocality = 1.0f;<a name="line.917"></a> -<span class="sourceLineNo">918</span> int lowestLocalityRegionIndex = -1;<a name="line.918"></a> -<span class="sourceLineNo">919</span> if (regionsPerServer[serverIndex].length == 0) {<a name="line.919"></a> -<span class="sourceLineNo">920</span> // No regions on that region server<a name="line.920"></a> -<span class="sourceLineNo">921</span> return -1;<a name="line.921"></a> -<span class="sourceLineNo">922</span> }<a name="line.922"></a> -<span class="sourceLineNo">923</span> for (int j = 0; j < regionsPerServer[serverIndex].length; j++) {<a name="line.923"></a> -<span class="sourceLineNo">924</span> int regionIndex = regionsPerServer[serverIndex][j];<a name="line.924"></a> -<span class="sourceLineNo">925</span> HDFSBlocksDistribution distribution = regionFinder<a name="line.925"></a> -<span class="sourceLineNo">926</span> .getBlockDistribution(regions[regionIndex]);<a name="line.926"></a> -<span class="sourceLineNo">927</span> float locality = distribution.getBlockLocalityIndex(servers[serverIndex].getHostname());<a name="line.927"></a> -<span class="sourceLineNo">928</span> // skip empty region<a name="line.928"></a> -<span class="sourceLineNo">929</span> if (distribution.getUniqueBlocksTotalWeight() == 0) {<a name="line.929"></a> -<span class="sourceLineNo">930</span> continue;<a name="line.930"></a> -<span class="sourceLineNo">931</span> }<a name="line.931"></a> -<span class="sourceLineNo">932</span> if (local
<TRUNCATED>
