http://git-wip-us.apache.org/repos/asf/hbase-site/blob/d41f56fe/devapidocs/src-html/org/apache/hadoop/hbase/mapreduce/TableSnapshotInputFormatImpl.html
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diff --git
a/devapidocs/src-html/org/apache/hadoop/hbase/mapreduce/TableSnapshotInputFormatImpl.html
b/devapidocs/src-html/org/apache/hadoop/hbase/mapreduce/TableSnapshotInputFormatImpl.html
index a0b0122..5473602 100644
---
a/devapidocs/src-html/org/apache/hadoop/hbase/mapreduce/TableSnapshotInputFormatImpl.html
+++
b/devapidocs/src-html/org/apache/hadoop/hbase/mapreduce/TableSnapshotInputFormatImpl.html
@@ -53,369 +53,458 @@
<span class="sourceLineNo">045</span>import
org.apache.hadoop.hbase.snapshot.SnapshotManifest;<a name="line.45"></a>
<span class="sourceLineNo">046</span>import
org.apache.hadoop.hbase.util.Bytes;<a name="line.46"></a>
<span class="sourceLineNo">047</span>import
org.apache.hadoop.hbase.util.FSUtils;<a name="line.47"></a>
-<span class="sourceLineNo">048</span>import org.apache.hadoop.io.Writable;<a
name="line.48"></a>
-<span class="sourceLineNo">049</span><a name="line.49"></a>
-<span class="sourceLineNo">050</span>import java.io.ByteArrayOutputStream;<a
name="line.50"></a>
-<span class="sourceLineNo">051</span>import java.io.DataInput;<a
name="line.51"></a>
-<span class="sourceLineNo">052</span>import java.io.DataOutput;<a
name="line.52"></a>
-<span class="sourceLineNo">053</span>import java.io.IOException;<a
name="line.53"></a>
-<span class="sourceLineNo">054</span>import java.util.ArrayList;<a
name="line.54"></a>
-<span class="sourceLineNo">055</span>import java.util.List;<a
name="line.55"></a>
-<span class="sourceLineNo">056</span>import java.util.UUID;<a
name="line.56"></a>
-<span class="sourceLineNo">057</span><a name="line.57"></a>
-<span class="sourceLineNo">058</span>/**<a name="line.58"></a>
-<span class="sourceLineNo">059</span> * Hadoop MR API-agnostic implementation
for mapreduce over table snapshots.<a name="line.59"></a>
-<span class="sourceLineNo">060</span> */<a name="line.60"></a>
-<span class="sourceLineNo">061</span>@InterfaceAudience.Private<a
name="line.61"></a>
-<span class="sourceLineNo">062</span>public class TableSnapshotInputFormatImpl
{<a name="line.62"></a>
-<span class="sourceLineNo">063</span> // TODO: Snapshots files are owned in
fs by the hbase user. There is no<a name="line.63"></a>
-<span class="sourceLineNo">064</span> // easy way to delegate access.<a
name="line.64"></a>
-<span class="sourceLineNo">065</span><a name="line.65"></a>
-<span class="sourceLineNo">066</span> public static final Log LOG =
LogFactory.getLog(TableSnapshotInputFormatImpl.class);<a name="line.66"></a>
-<span class="sourceLineNo">067</span><a name="line.67"></a>
-<span class="sourceLineNo">068</span> private static final String
SNAPSHOT_NAME_KEY = "hbase.TableSnapshotInputFormat.snapshot.name";<a
name="line.68"></a>
-<span class="sourceLineNo">069</span> // key for specifying the root dir of
the restored snapshot<a name="line.69"></a>
-<span class="sourceLineNo">070</span> protected static final String
RESTORE_DIR_KEY = "hbase.TableSnapshotInputFormat.restore.dir";<a
name="line.70"></a>
-<span class="sourceLineNo">071</span><a name="line.71"></a>
-<span class="sourceLineNo">072</span> /** See {@link
#getBestLocations(Configuration, HDFSBlocksDistribution)} */<a
name="line.72"></a>
-<span class="sourceLineNo">073</span> private static final String
LOCALITY_CUTOFF_MULTIPLIER =<a name="line.73"></a>
-<span class="sourceLineNo">074</span>
"hbase.tablesnapshotinputformat.locality.cutoff.multiplier";<a
name="line.74"></a>
-<span class="sourceLineNo">075</span> private static final float
DEFAULT_LOCALITY_CUTOFF_MULTIPLIER = 0.8f;<a name="line.75"></a>
-<span class="sourceLineNo">076</span><a name="line.76"></a>
-<span class="sourceLineNo">077</span> /**<a name="line.77"></a>
-<span class="sourceLineNo">078</span> * Implementation class for InputSplit
logic common between mapred and mapreduce.<a name="line.78"></a>
-<span class="sourceLineNo">079</span> */<a name="line.79"></a>
-<span class="sourceLineNo">080</span> public static class InputSplit
implements Writable {<a name="line.80"></a>
-<span class="sourceLineNo">081</span><a name="line.81"></a>
-<span class="sourceLineNo">082</span> private TableDescriptor htd;<a
name="line.82"></a>
-<span class="sourceLineNo">083</span> private HRegionInfo regionInfo;<a
name="line.83"></a>
-<span class="sourceLineNo">084</span> private String[] locations;<a
name="line.84"></a>
-<span class="sourceLineNo">085</span> private String scan;<a
name="line.85"></a>
-<span class="sourceLineNo">086</span> private String restoreDir;<a
name="line.86"></a>
-<span class="sourceLineNo">087</span><a name="line.87"></a>
-<span class="sourceLineNo">088</span> // constructor for mapreduce
framework / Writable<a name="line.88"></a>
-<span class="sourceLineNo">089</span> public InputSplit() {}<a
name="line.89"></a>
-<span class="sourceLineNo">090</span><a name="line.90"></a>
-<span class="sourceLineNo">091</span> public InputSplit(TableDescriptor
htd, HRegionInfo regionInfo, List<String> locations,<a name="line.91"></a>
-<span class="sourceLineNo">092</span> Scan scan, Path restoreDir) {<a
name="line.92"></a>
-<span class="sourceLineNo">093</span> this.htd = htd;<a
name="line.93"></a>
-<span class="sourceLineNo">094</span> this.regionInfo = regionInfo;<a
name="line.94"></a>
-<span class="sourceLineNo">095</span> if (locations == null ||
locations.isEmpty()) {<a name="line.95"></a>
-<span class="sourceLineNo">096</span> this.locations = new String[0];<a
name="line.96"></a>
-<span class="sourceLineNo">097</span> } else {<a name="line.97"></a>
-<span class="sourceLineNo">098</span> this.locations =
locations.toArray(new String[locations.size()]);<a name="line.98"></a>
-<span class="sourceLineNo">099</span> }<a name="line.99"></a>
-<span class="sourceLineNo">100</span> try {<a name="line.100"></a>
-<span class="sourceLineNo">101</span> this.scan = scan != null ?
TableMapReduceUtil.convertScanToString(scan) : "";<a name="line.101"></a>
-<span class="sourceLineNo">102</span> } catch (IOException e) {<a
name="line.102"></a>
-<span class="sourceLineNo">103</span> LOG.warn("Failed to convert Scan
to String", e);<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> this.restoreDir =
restoreDir.toString();<a name="line.106"></a>
-<span class="sourceLineNo">107</span> }<a name="line.107"></a>
-<span class="sourceLineNo">108</span><a name="line.108"></a>
-<span class="sourceLineNo">109</span> public TableDescriptor getHtd() {<a
name="line.109"></a>
-<span class="sourceLineNo">110</span> return htd;<a name="line.110"></a>
-<span class="sourceLineNo">111</span> }<a name="line.111"></a>
-<span class="sourceLineNo">112</span><a name="line.112"></a>
-<span class="sourceLineNo">113</span> public String getScan() {<a
name="line.113"></a>
-<span class="sourceLineNo">114</span> return scan;<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> public String getRestoreDir() {<a
name="line.117"></a>
-<span class="sourceLineNo">118</span> return restoreDir;<a
name="line.118"></a>
+<span class="sourceLineNo">048</span>import
org.apache.hadoop.hbase.util.RegionSplitter;<a name="line.48"></a>
+<span class="sourceLineNo">049</span>import org.apache.hadoop.io.Writable;<a
name="line.49"></a>
+<span class="sourceLineNo">050</span><a name="line.50"></a>
+<span class="sourceLineNo">051</span>import java.io.ByteArrayOutputStream;<a
name="line.51"></a>
+<span class="sourceLineNo">052</span>import java.io.DataInput;<a
name="line.52"></a>
+<span class="sourceLineNo">053</span>import java.io.DataOutput;<a
name="line.53"></a>
+<span class="sourceLineNo">054</span>import java.io.IOException;<a
name="line.54"></a>
+<span class="sourceLineNo">055</span>import java.util.ArrayList;<a
name="line.55"></a>
+<span class="sourceLineNo">056</span>import java.util.List;<a
name="line.56"></a>
+<span class="sourceLineNo">057</span>import java.util.UUID;<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> * Hadoop MR API-agnostic implementation
for mapreduce over table snapshots.<a name="line.60"></a>
+<span class="sourceLineNo">061</span> */<a name="line.61"></a>
+<span class="sourceLineNo">062</span>@InterfaceAudience.Private<a
name="line.62"></a>
+<span class="sourceLineNo">063</span>public class TableSnapshotInputFormatImpl
{<a name="line.63"></a>
+<span class="sourceLineNo">064</span> // TODO: Snapshots files are owned in
fs by the hbase user. There is no<a name="line.64"></a>
+<span class="sourceLineNo">065</span> // easy way to delegate access.<a
name="line.65"></a>
+<span class="sourceLineNo">066</span><a name="line.66"></a>
+<span class="sourceLineNo">067</span> public static final Log LOG =
LogFactory.getLog(TableSnapshotInputFormatImpl.class);<a name="line.67"></a>
+<span class="sourceLineNo">068</span><a name="line.68"></a>
+<span class="sourceLineNo">069</span> private static final String
SNAPSHOT_NAME_KEY = "hbase.TableSnapshotInputFormat.snapshot.name";<a
name="line.69"></a>
+<span class="sourceLineNo">070</span> // key for specifying the root dir of
the restored snapshot<a name="line.70"></a>
+<span class="sourceLineNo">071</span> protected static final String
RESTORE_DIR_KEY = "hbase.TableSnapshotInputFormat.restore.dir";<a
name="line.71"></a>
+<span class="sourceLineNo">072</span><a name="line.72"></a>
+<span class="sourceLineNo">073</span> /** See {@link
#getBestLocations(Configuration, HDFSBlocksDistribution)} */<a
name="line.73"></a>
+<span class="sourceLineNo">074</span> private static final String
LOCALITY_CUTOFF_MULTIPLIER =<a name="line.74"></a>
+<span class="sourceLineNo">075</span>
"hbase.tablesnapshotinputformat.locality.cutoff.multiplier";<a
name="line.75"></a>
+<span class="sourceLineNo">076</span> private static final float
DEFAULT_LOCALITY_CUTOFF_MULTIPLIER = 0.8f;<a name="line.76"></a>
+<span class="sourceLineNo">077</span><a name="line.77"></a>
+<span class="sourceLineNo">078</span> /**<a name="line.78"></a>
+<span class="sourceLineNo">079</span> * For MapReduce jobs running multiple
mappers per region, determines<a name="line.79"></a>
+<span class="sourceLineNo">080</span> * what split algorithm we should be
using to find split points for scanners.<a name="line.80"></a>
+<span class="sourceLineNo">081</span> */<a name="line.81"></a>
+<span class="sourceLineNo">082</span> public static final String SPLIT_ALGO =
"hbase.mapreduce.split.algorithm";<a name="line.82"></a>
+<span class="sourceLineNo">083</span> /**<a name="line.83"></a>
+<span class="sourceLineNo">084</span> * For MapReduce jobs running multiple
mappers per region, determines<a name="line.84"></a>
+<span class="sourceLineNo">085</span> * number of splits to generate per
region.<a name="line.85"></a>
+<span class="sourceLineNo">086</span> */<a name="line.86"></a>
+<span class="sourceLineNo">087</span> public static final String
NUM_SPLITS_PER_REGION = "hbase.mapreduce.splits.per.region";<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> * Implementation class for InputSplit
logic common between mapred and mapreduce.<a name="line.90"></a>
+<span class="sourceLineNo">091</span> */<a name="line.91"></a>
+<span class="sourceLineNo">092</span> public static class InputSplit
implements Writable {<a name="line.92"></a>
+<span class="sourceLineNo">093</span><a name="line.93"></a>
+<span class="sourceLineNo">094</span> private TableDescriptor htd;<a
name="line.94"></a>
+<span class="sourceLineNo">095</span> private HRegionInfo regionInfo;<a
name="line.95"></a>
+<span class="sourceLineNo">096</span> private String[] locations;<a
name="line.96"></a>
+<span class="sourceLineNo">097</span> private String scan;<a
name="line.97"></a>
+<span class="sourceLineNo">098</span> private String restoreDir;<a
name="line.98"></a>
+<span class="sourceLineNo">099</span><a name="line.99"></a>
+<span class="sourceLineNo">100</span> // constructor for mapreduce
framework / Writable<a name="line.100"></a>
+<span class="sourceLineNo">101</span> public InputSplit() {}<a
name="line.101"></a>
+<span class="sourceLineNo">102</span><a name="line.102"></a>
+<span class="sourceLineNo">103</span> public InputSplit(TableDescriptor
htd, HRegionInfo regionInfo, List<String> locations,<a
name="line.103"></a>
+<span class="sourceLineNo">104</span> Scan scan, Path restoreDir) {<a
name="line.104"></a>
+<span class="sourceLineNo">105</span> this.htd = htd;<a
name="line.105"></a>
+<span class="sourceLineNo">106</span> this.regionInfo = regionInfo;<a
name="line.106"></a>
+<span class="sourceLineNo">107</span> if (locations == null ||
locations.isEmpty()) {<a name="line.107"></a>
+<span class="sourceLineNo">108</span> this.locations = new String[0];<a
name="line.108"></a>
+<span class="sourceLineNo">109</span> } else {<a name="line.109"></a>
+<span class="sourceLineNo">110</span> this.locations =
locations.toArray(new String[locations.size()]);<a name="line.110"></a>
+<span class="sourceLineNo">111</span> }<a name="line.111"></a>
+<span class="sourceLineNo">112</span> try {<a name="line.112"></a>
+<span class="sourceLineNo">113</span> this.scan = scan != null ?
TableMapReduceUtil.convertScanToString(scan) : "";<a name="line.113"></a>
+<span class="sourceLineNo">114</span> } catch (IOException e) {<a
name="line.114"></a>
+<span class="sourceLineNo">115</span> LOG.warn("Failed to convert Scan
to String", e);<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> this.restoreDir =
restoreDir.toString();<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> public long getLength() {<a
name="line.121"></a>
-<span class="sourceLineNo">122</span> //TODO: We can obtain the file
sizes of the snapshot here.<a name="line.122"></a>
-<span class="sourceLineNo">123</span> return 0;<a name="line.123"></a>
-<span class="sourceLineNo">124</span> }<a name="line.124"></a>
-<span class="sourceLineNo">125</span><a name="line.125"></a>
-<span class="sourceLineNo">126</span> public String[] getLocations() {<a
name="line.126"></a>
-<span class="sourceLineNo">127</span> return locations;<a
name="line.127"></a>
-<span class="sourceLineNo">128</span> }<a name="line.128"></a>
-<span class="sourceLineNo">129</span><a name="line.129"></a>
-<span class="sourceLineNo">130</span> public TableDescriptor
getTableDescriptor() {<a name="line.130"></a>
-<span class="sourceLineNo">131</span> return htd;<a name="line.131"></a>
-<span class="sourceLineNo">132</span> }<a name="line.132"></a>
-<span class="sourceLineNo">133</span><a name="line.133"></a>
-<span class="sourceLineNo">134</span> public HRegionInfo getRegionInfo()
{<a name="line.134"></a>
-<span class="sourceLineNo">135</span> return regionInfo;<a
name="line.135"></a>
+<span class="sourceLineNo">121</span> public TableDescriptor getHtd() {<a
name="line.121"></a>
+<span class="sourceLineNo">122</span> return htd;<a name="line.122"></a>
+<span class="sourceLineNo">123</span> }<a name="line.123"></a>
+<span class="sourceLineNo">124</span><a name="line.124"></a>
+<span class="sourceLineNo">125</span> public String getScan() {<a
name="line.125"></a>
+<span class="sourceLineNo">126</span> return scan;<a name="line.126"></a>
+<span class="sourceLineNo">127</span> }<a name="line.127"></a>
+<span class="sourceLineNo">128</span><a name="line.128"></a>
+<span class="sourceLineNo">129</span> public String getRestoreDir() {<a
name="line.129"></a>
+<span class="sourceLineNo">130</span> return restoreDir;<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> public long getLength() {<a
name="line.133"></a>
+<span class="sourceLineNo">134</span> //TODO: We can obtain the file
sizes of the snapshot here.<a name="line.134"></a>
+<span class="sourceLineNo">135</span> return 0;<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> // TODO: We should have
ProtobufSerialization in Hadoop, and directly use PB objects instead of<a
name="line.138"></a>
-<span class="sourceLineNo">139</span> // doing this wrapping with
Writables.<a name="line.139"></a>
-<span class="sourceLineNo">140</span> @Override<a name="line.140"></a>
-<span class="sourceLineNo">141</span> public void write(DataOutput out)
throws IOException {<a name="line.141"></a>
-<span class="sourceLineNo">142</span> TableSnapshotRegionSplit.Builder
builder = TableSnapshotRegionSplit.newBuilder()<a name="line.142"></a>
-<span class="sourceLineNo">143</span>
.setTable(ProtobufUtil.toTableSchema(htd))<a name="line.143"></a>
-<span class="sourceLineNo">144</span>
.setRegion(HRegionInfo.convert(regionInfo));<a name="line.144"></a>
+<span class="sourceLineNo">138</span> public String[] getLocations() {<a
name="line.138"></a>
+<span class="sourceLineNo">139</span> return locations;<a
name="line.139"></a>
+<span class="sourceLineNo">140</span> }<a name="line.140"></a>
+<span class="sourceLineNo">141</span><a name="line.141"></a>
+<span class="sourceLineNo">142</span> public TableDescriptor
getTableDescriptor() {<a name="line.142"></a>
+<span class="sourceLineNo">143</span> return htd;<a name="line.143"></a>
+<span class="sourceLineNo">144</span> }<a name="line.144"></a>
<span class="sourceLineNo">145</span><a name="line.145"></a>
-<span class="sourceLineNo">146</span> for (String location : locations)
{<a name="line.146"></a>
-<span class="sourceLineNo">147</span> builder.addLocations(location);<a
name="line.147"></a>
-<span class="sourceLineNo">148</span> }<a name="line.148"></a>
+<span class="sourceLineNo">146</span> public HRegionInfo getRegionInfo()
{<a name="line.146"></a>
+<span class="sourceLineNo">147</span> return regionInfo;<a
name="line.147"></a>
+<span class="sourceLineNo">148</span> }<a name="line.148"></a>
<span class="sourceLineNo">149</span><a name="line.149"></a>
-<span class="sourceLineNo">150</span> TableSnapshotRegionSplit split =
builder.build();<a name="line.150"></a>
-<span class="sourceLineNo">151</span><a name="line.151"></a>
-<span class="sourceLineNo">152</span> ByteArrayOutputStream baos = new
ByteArrayOutputStream();<a name="line.152"></a>
-<span class="sourceLineNo">153</span> split.writeTo(baos);<a
name="line.153"></a>
-<span class="sourceLineNo">154</span> baos.close();<a name="line.154"></a>
-<span class="sourceLineNo">155</span> byte[] buf = baos.toByteArray();<a
name="line.155"></a>
-<span class="sourceLineNo">156</span> out.writeInt(buf.length);<a
name="line.156"></a>
-<span class="sourceLineNo">157</span> out.write(buf);<a
name="line.157"></a>
-<span class="sourceLineNo">158</span><a name="line.158"></a>
-<span class="sourceLineNo">159</span> Bytes.writeByteArray(out,
Bytes.toBytes(scan));<a name="line.159"></a>
-<span class="sourceLineNo">160</span> Bytes.writeByteArray(out,
Bytes.toBytes(restoreDir));<a name="line.160"></a>
+<span class="sourceLineNo">150</span> // TODO: We should have
ProtobufSerialization in Hadoop, and directly use PB objects instead of<a
name="line.150"></a>
+<span class="sourceLineNo">151</span> // doing this wrapping with
Writables.<a name="line.151"></a>
+<span class="sourceLineNo">152</span> @Override<a name="line.152"></a>
+<span class="sourceLineNo">153</span> public void write(DataOutput out)
throws IOException {<a name="line.153"></a>
+<span class="sourceLineNo">154</span> TableSnapshotRegionSplit.Builder
builder = TableSnapshotRegionSplit.newBuilder()<a name="line.154"></a>
+<span class="sourceLineNo">155</span>
.setTable(ProtobufUtil.toTableSchema(htd))<a name="line.155"></a>
+<span class="sourceLineNo">156</span>
.setRegion(HRegionInfo.convert(regionInfo));<a name="line.156"></a>
+<span class="sourceLineNo">157</span><a name="line.157"></a>
+<span class="sourceLineNo">158</span> for (String location : locations)
{<a name="line.158"></a>
+<span class="sourceLineNo">159</span> builder.addLocations(location);<a
name="line.159"></a>
+<span class="sourceLineNo">160</span> }<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">162</span> TableSnapshotRegionSplit split =
builder.build();<a name="line.162"></a>
<span class="sourceLineNo">163</span><a name="line.163"></a>
-<span class="sourceLineNo">164</span> @Override<a name="line.164"></a>
-<span class="sourceLineNo">165</span> public void readFields(DataInput in)
throws IOException {<a name="line.165"></a>
-<span class="sourceLineNo">166</span> int len = in.readInt();<a
name="line.166"></a>
-<span class="sourceLineNo">167</span> byte[] buf = new byte[len];<a
name="line.167"></a>
-<span class="sourceLineNo">168</span> in.readFully(buf);<a
name="line.168"></a>
-<span class="sourceLineNo">169</span> TableSnapshotRegionSplit split =
TableSnapshotRegionSplit.PARSER.parseFrom(buf);<a name="line.169"></a>
-<span class="sourceLineNo">170</span> this.htd =
ProtobufUtil.toTableDescriptor(split.getTable());<a name="line.170"></a>
-<span class="sourceLineNo">171</span> this.regionInfo =
HRegionInfo.convert(split.getRegion());<a name="line.171"></a>
-<span class="sourceLineNo">172</span> List<String> locationsList =
split.getLocationsList();<a name="line.172"></a>
-<span class="sourceLineNo">173</span> this.locations =
locationsList.toArray(new String[locationsList.size()]);<a name="line.173"></a>
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ProtobufUtil.toTableDescriptor(split.getTable());<a name="line.182"></a>
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<span class="sourceLineNo">201</span><a name="line.201"></a>
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scan.setIsolationLevel(IsolationLevel.READ_UNCOMMITTED);<a name="line.216"></a>
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name="line.218"></a>
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<span class="sourceLineNo">240</span> }<a name="line.240"></a>
<span class="sourceLineNo">241</span><a name="line.241"></a>
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Path(conf.get(RESTORE_DIR_KEY));<a name="line.262"></a>
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name="line.242"></a>
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name="line.243"></a>
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name="line.246"></a>
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name="line.250"></a>
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getSnapshotName(conf);<a name="line.262"></a>
<span class="sourceLineNo">263</span><a name="line.263"></a>
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FSUtils.getRootDir(conf);<a name="line.264"></a>
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rootDir.getFileSystem(conf);<a name="line.265"></a>
<span class="sourceLineNo">266</span><a name="line.266"></a>
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SnapshotDescriptionUtils.getCompletedSnapshotDir(snapshotName, rootDir);<a
name="line.287"></a>
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SnapshotDescriptionUtils.readSnapshotInfo(fs, snapshotDir);<a
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conf.get(org.apache.hadoop.hbase.mapred.TableInputFormat.COLUMN_LIST).split("
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scan.addFamily(Bytes.toBytes(col));<a name="line.301"></a>
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getSnapshotManifest(conf, snapshotName, rootDir, fs);<a name="line.267"></a>
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getRegionInfosFromManifest(manifest);<a name="line.269"></a>
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extractScanFromConf(conf);<a name="line.272"></a>
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restored<a name="line.273"></a>
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Path(conf.get(RESTORE_DIR_KEY));<a name="line.274"></a>
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splitAlgo = getSplitAlgo(conf);<a name="line.276"></a>
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conf.getInt(NUM_SPLITS_PER_REGION, 1);<a name="line.278"></a>
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regionInfos, restoreDir, conf, splitAlgo, numSplits);<a name="line.280"></a>
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RegionSplitter.SplitAlgorithm getSplitAlgo(Configuration conf) throws
IOException{<a name="line.283"></a>
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conf.get(SPLIT_ALGO);<a name="line.284"></a>
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name="line.285"></a>
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RegionSplitter.SplitAlgorithm>)<a name="line.288"></a>
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Class.forName(splitAlgoClassName)).newInstance();<a name="line.289"></a>
+<span class="sourceLineNo">290</span> } catch (ClassNotFoundException e)
{<a name="line.290"></a>
+<span class="sourceLineNo">291</span> throw new IOException("SplitAlgo
class " + splitAlgoClassName +<a name="line.291"></a>
+<span class="sourceLineNo">292</span> " is not found", e);<a
name="line.292"></a>
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{<a name="line.293"></a>
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class " + splitAlgoClassName +<a name="line.294"></a>
+<span class="sourceLineNo">295</span> " is not instantiable",
e);<a name="line.295"></a>
+<span class="sourceLineNo">296</span> } catch (IllegalAccessException e)
{<a name="line.296"></a>
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class " + splitAlgoClassName +<a name="line.297"></a>
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e);<a name="line.298"></a>
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+<span class="sourceLineNo">301</span><a name="line.301"></a>
+<span class="sourceLineNo">302</span><a name="line.302"></a>
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getRegionInfosFromManifest(SnapshotManifest manifest) {<a name="line.303"></a>
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regionManifests = manifest.getRegionManifests();<a name="line.304"></a>
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name="line.305"></a>
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IllegalArgumentException("Snapshot seems empty");<a name="line.306"></a>
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getSplits(Scan scan, SnapshotManifest manifest,<a name="line.309"></a>
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name="line.318"></a>
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name="line.321"></a>
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getBestLocations(conf,<a name="line.324"></a>
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HRegion.computeHDFSBlocksDistribution(conf, htd, hri, tableDir));<a
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(hbase.tablesnapshotinputformat.locality.cutoff.multiplier) as much block
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HDFSBlocksDistribution blockDistribution) {<a name="line.350"></a>
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ArrayList<>(3);<a name="line.351"></a>
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hostAndWeights[0];<a name="line.359"></a>
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name="line.360"></a>
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Lists.newArrayListWithCapacity(regionManifests.size());<a name="line.309"></a>
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+<span class="sourceLineNo">311</span> for (SnapshotRegionManifest
regionManifest : regionManifests) {<a name="line.311"></a>
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HRegionInfo.convert(regionManifest.getRegionInfo());<a name="line.312"></a>
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(hri.isSplit() || hri.isSplitParent())) {<a name="line.313"></a>
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name="line.316"></a>
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name="line.318"></a>
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getSnapshotManifest(Configuration conf, String snapshotName,<a
name="line.321"></a>
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IOException {<a name="line.322"></a>
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SnapshotDescriptionUtils.getCompletedSnapshotDir(snapshotName, rootDir);<a
name="line.323"></a>
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SnapshotDescriptionUtils.readSnapshotInfo(fs, snapshotDir);<a
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fs, snapshotDir, snapshotDesc);<a name="line.325"></a>
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+<span class="sourceLineNo">327</span><a name="line.327"></a>
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extractScanFromConf(Configuration conf) throws IOException {<a
name="line.328"></a>
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name="line.329"></a>
+<span class="sourceLineNo">330</span> if (conf.get(TableInputFormat.SCAN)
!= null) {<a name="line.330"></a>
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TableMapReduceUtil.convertStringToScan(conf.get(TableInputFormat.SCAN));<a
name="line.331"></a>
+<span class="sourceLineNo">332</span> } else if
(conf.get(org.apache.hadoop.hbase.mapred.TableInputFormat.COLUMN_LIST) != null)
{<a name="line.332"></a>
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conf.get(org.apache.hadoop.hbase.mapred.TableInputFormat.COLUMN_LIST).split("
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name="line.336"></a>
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scan.addFamily(Bytes.toBytes(col));<a name="line.337"></a>
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IllegalArgumentException("Unable to create scan");<a name="line.340"></a>
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+<span class="sourceLineNo">344</span><a name="line.344"></a>
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getSplits(Scan scan, SnapshotManifest manifest,<a name="line.345"></a>
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regionManifests, Path restoreDir, Configuration conf) throws IOException {<a
name="line.346"></a>
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regionManifests, restoreDir, conf, null, 1);<a name="line.347"></a>
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getSplits(Scan scan, SnapshotManifest manifest,<a name="line.350"></a>
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regionManifests, Path restoreDir,<a name="line.351"></a>
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RegionSplitter.SplitAlgorithm sa, int numSplits) throws IOException {<a
name="line.352"></a>
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name="line.353"></a>
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manifest.getTableDescriptor();<a name="line.354"></a>
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FSUtils.getTableDir(restoreDir, htd.getTableName());<a name="line.356"></a>
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ArrayList<>();<a name="line.358"></a>
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regionManifests) {<a name="line.359"></a>
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name="line.360"></a>
<span class="sourceLineNo">361</span><a name="line.361"></a>
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conf.getFloat(LOCALITY_CUTOFF_MULTIPLIER,
DEFAULT_LOCALITY_CUTOFF_MULTIPLIER);<a name="line.364"></a>
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hostAndWeights.length; i++) {<a name="line.368"></a>
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locations.add(hostAndWeights[i].getHost());<a name="line.370"></a>
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configuration<a name="line.389"></a>
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snapshot to read from<a name="line.390"></a>
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directory to restore the snapshot into. Current user should<a
name="line.391"></a>
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directory, and this should not be a subdirectory of rootdir.<a
name="line.392"></a>
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restoreDir can be deleted.<a name="line.393"></a>
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occurs<a name="line.394"></a>
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setInput(Configuration conf, String snapshotName, Path restoreDir)<a
name="line.396"></a>
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name="line.397"></a>
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snapshotName);<a name="line.398"></a>
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FSUtils.getRootDir(conf);<a name="line.400"></a>
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RestoreSnapshotHelper.copySnapshotForScanner(conf, fs, rootDir, restoreDir,
snapshotName);<a name="line.406"></a>
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sa.split(hri.getStartKey(), hri.getEndKey(), numSplits, true);<a
name="line.363"></a>
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- 1; i++) {<a name="line.364"></a>
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(CellUtil.overlappingKeys(scan.getStartRow(), scan.getStopRow(), sp[i],<a
name="line.365"></a>
+<span class="sourceLineNo">366</span> sp[i + 1])) {<a
name="line.366"></a>
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from snapshot files (which will get the locations for<a name="line.367"></a>
+<span class="sourceLineNo">368</span> // referred hfiles)<a
name="line.368"></a>
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getBestLocations(conf,<a name="line.369"></a>
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HRegion.computeHDFSBlocksDistribution(conf, htd, hri, tableDir));<a
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hosts.size());<a name="line.372"></a>
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len);<a name="line.373"></a>
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Scan(scan);<a name="line.374"></a>
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boundedScan.setStartRow(sp[i]);<a name="line.375"></a>
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1]);<a name="line.376"></a>
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InputSplit(htd, hri, hosts, boundedScan, restoreDir));<a name="line.377"></a>
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(CellUtil.overlappingKeys(scan.getStartRow(), scan.getStopRow(),
hri.getStartKey(),<a name="line.381"></a>
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name="line.382"></a>
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snapshot files (which will get the locations for<a name="line.383"></a>
+<span class="sourceLineNo">384</span> // referred hfiles)<a
name="line.384"></a>
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getBestLocations(conf,<a name="line.385"></a>
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HRegion.computeHDFSBlocksDistribution(conf, htd, hri, tableDir));<a
name="line.386"></a>
+<span class="sourceLineNo">387</span><a name="line.387"></a>
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hosts.size());<a name="line.388"></a>
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len);<a name="line.389"></a>
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hri, hosts, scan, restoreDir));<a name="line.390"></a>
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+<span class="sourceLineNo">399</span> /**<a name="line.399"></a>
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passed from the InputSplit. MR/Yarn schedulers does not take<a
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treat every location passed from the input split as equal. We<a
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locations, since we are creating one split per region, and<a
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distributed throughout the cluster unless favorite node assignment<a
name="line.403"></a>
+<span class="sourceLineNo">404</span> * is used. On the expected stable
case, only one location will contain most of the blocks as<a
name="line.404"></a>
+<span class="sourceLineNo">405</span> * local.<a name="line.405"></a>
+<span class="sourceLineNo">406</span> * On the other hand, in favored node
assignment, 3 nodes will contain highly local blocks. Here<a
name="line.406"></a>
+<span class="sourceLineNo">407</span> * we are doing a simple heuristic,
where we will pass all hosts which have at least 80%<a name="line.407"></a>
+<span class="sourceLineNo">408</span> *
(hbase.tablesnapshotinputformat.locality.cutoff.multiplier) as much block
locality as the top<a name="line.408"></a>
+<span class="sourceLineNo">409</span> * host with the best locality.<a
name="line.409"></a>
+<span class="sourceLineNo">410</span> */<a name="line.410"></a>
+<span class="sourceLineNo">411</span> public static List<String>
getBestLocations(<a name="line.411"></a>
+<span class="sourceLineNo">412</span> Configuration conf,
HDFSBlocksDistribution blockDistribution) {<a name="line.412"></a>
+<span class="sourceLineNo">413</span> List<String> locations = new
ArrayList<>(3);<a name="line.413"></a>
+<span class="sourceLineNo">414</span><a name="line.414"></a>
+<span class="sourceLineNo">415</span> HostAndWeight[] hostAndWeights =
blockDistribution.getTopHostsWithWeights();<a name="line.415"></a>
+<span class="sourceLineNo">416</span><a name="line.416"></a>
+<span class="sourceLineNo">417</span> if (hostAndWeights.length == 0) {<a
name="line.417"></a>
+<span class="sourceLineNo">418</span> return locations;<a
name="line.418"></a>
+<span class="sourceLineNo">419</span> }<a name="line.419"></a>
+<span class="sourceLineNo">420</span><a name="line.420"></a>
+<span class="sourceLineNo">421</span> HostAndWeight topHost =
hostAndWeights[0];<a name="line.421"></a>
+<span class="sourceLineNo">422</span> locations.add(topHost.getHost());<a
name="line.422"></a>
+<span class="sourceLineNo">423</span><a name="line.423"></a>
+<span class="sourceLineNo">424</span> // Heuristic: filter all hosts which
have at least cutoffMultiplier % of block locality<a name="line.424"></a>
+<span class="sourceLineNo">425</span> double cutoffMultiplier<a
name="line.425"></a>
+<span class="sourceLineNo">426</span> =
conf.getFloat(LOCALITY_CUTOFF_MULTIPLIER,
DEFAULT_LOCALITY_CUTOFF_MULTIPLIER);<a name="line.426"></a>
+<span class="sourceLineNo">427</span><a name="line.427"></a>
+<span class="sourceLineNo">428</span> double filterWeight =
topHost.getWeight() * cutoffMultiplier;<a name="line.428"></a>
+<span class="sourceLineNo">429</span><a name="line.429"></a>
+<span class="sourceLineNo">430</span> for (int i = 1; i <
hostAndWeights.length; i++) {<a name="line.430"></a>
+<span class="sourceLineNo">431</span> if (hostAndWeights[i].getWeight()
>= filterWeight) {<a name="line.431"></a>
+<span class="sourceLineNo">432</span>
locations.add(hostAndWeights[i].getHost());<a name="line.432"></a>
+<span class="sourceLineNo">433</span> } else {<a name="line.433"></a>
+<span class="sourceLineNo">434</span> break;<a name="line.434"></a>
+<span class="sourceLineNo">435</span> }<a name="line.435"></a>
+<span class="sourceLineNo">436</span> }<a name="line.436"></a>
+<span class="sourceLineNo">437</span><a name="line.437"></a>
+<span class="sourceLineNo">438</span> return locations;<a
name="line.438"></a>
+<span class="sourceLineNo">439</span> }<a name="line.439"></a>
+<span class="sourceLineNo">440</span><a name="line.440"></a>
+<span class="sourceLineNo">441</span> private static String
getSnapshotName(Configuration conf) {<a name="line.441"></a>
+<span class="sourceLineNo">442</span> String snapshotName =
conf.get(SNAPSHOT_NAME_KEY);<a name="line.442"></a>
+<span class="sourceLineNo">443</span> if (snapshotName == null) {<a
name="line.443"></a>
+<span class="sourceLineNo">444</span> throw new
IllegalArgumentException("Snapshot name must be provided");<a
name="line.444"></a>
+<span class="sourceLineNo">445</span> }<a name="line.445"></a>
+<span class="sourceLineNo">446</span> return snapshotName;<a
name="line.446"></a>
+<span class="sourceLineNo">447</span> }<a name="line.447"></a>
+<span class="sourceLineNo">448</span><a name="line.448"></a>
+<span class="sourceLineNo">449</span> /**<a name="line.449"></a>
+<span class="sourceLineNo">450</span> * Configures the job to use
TableSnapshotInputFormat to read from a snapshot.<a name="line.450"></a>
+<span class="sourceLineNo">451</span> * @param conf the job to
configuration<a name="line.451"></a>
+<span class="sourceLineNo">452</span> * @param snapshotName the name of the
snapshot to read from<a name="line.452"></a>
+<span class="sourceLineNo">453</span> * @param restoreDir a temporary
directory to restore the snapshot into. Current user should<a
name="line.453"></a>
+<span class="sourceLineNo">454</span> * have write permissions to this
directory, and this should not be a subdirectory of rootdir.<a
name="line.454"></a>
+<span class="sourceLineNo">455</span> * After the job is finished,
restoreDir can be deleted.<a name="line.455"></a>
+<span class="sourceLineNo">456</span> * @throws IOException if an error
occurs<a name="line.456"></a>
+<span class="sourceLineNo">457</span> */<a name="line.457"></a>
+<span class="sourceLineNo">458</span> public static void
setInput(Configuration conf, String snapshotName, Path restoreDir)<a
name="line.458"></a>
+<span class="sourceLineNo">459</span> throws IOException {<a
name="line.459"></a>
+<span class="sourceLineNo">460</span> setInput(conf, snapshotName,
restoreDir, null, 1);<a name="line.460"></a>
+<span class="sourceLineNo">461</span> }<a name="line.461"></a>
+<span class="sourceLineNo">462</span><a name="line.462"></a>
+<span class="sourceLineNo">463</span> /**<a name="line.463"></a>
+<span class="sourceLineNo">464</span> * Configures the job to use
TableSnapshotInputFormat to read from a snapshot.<a name="line.464"></a>
+<span class="sourceLineNo">465</span> * @param conf the job to configure<a
name="line.465"></a>
+<span class="sourceLineNo">466</span> * @param snapshotName the name of the
snapshot to read from<a name="line.466"></a>
+<span class="sourceLineNo">467</span> * @param restoreDir a temporary
directory to restore the snapshot into. Current user should<a
name="line.467"></a>
+<span class="sourceLineNo">468</span> * have write permissions to this
directory, and this should not be a subdirectory of rootdir.<a
name="line.468"></a>
+<span class="sourceLineNo">469</span> * After the job is finished,
restoreDir can be deleted.<a name="line.469"></a>
+<span class="sourceLineNo">470</span> * @param numSplitsPerRegion how many
input splits to generate per one region<a name="line.470"></a>
+<span class="sourceLineNo">471</span> * @param splitAlgo SplitAlgorithm to
be used when generating InputSplits<a name="line.471"></a>
+<span class="sourceLineNo">472</span> * @throws IOException if an error
occurs<a name="line.472"></a>
+<span class="sourceLineNo">473</span> */<a name="line.473"></a>
+<span class="sourceLineNo">474</span> public static void
setInput(Configuration conf, String snapshotName, Path restoreDir,<a
name="line.474"></a>
+<span class="sourceLineNo">475</span>
RegionSplitter.SplitAlgorithm splitAlgo, int numSplitsPerRegion)<a
name="line.475"></a>
+<span class="sourceLineNo">476</span> throws IOException {<a
name="line.476"></a>
+<span class="sourceLineNo">477</span> conf.set(SNAPSHOT_NAME_KEY,
snapshotName);<a name="line.477"></a>
+<span class="sourceLineNo">478</span> if (numSplitsPerRegion < 1) {<a
name="line.478"></a>
+<span class="sourceLineNo">479</span> throw new
IllegalArgumentException("numSplits must be >= 1, " +<a name="line.479"></a>
+<span class="sourceLineNo">480</span> "illegal numSplits : " +
numSplitsPerRegion);<a name="line.480"></a>
+<span class="sourceLineNo">481</span> }<a name="line.481"></a>
+<span class="sourceLineNo">482</span> if (splitAlgo == null &&
numSplitsPerRegion > 1) {<a name="line.482"></a>
+<span class="sourceLineNo">483</span> throw new
IllegalArgumentException("Split algo can't be null when numSplits > 1");<a
name="line.483"></a>
+<span class="sourceLineNo">484</span> }<a name="line.484"></a>
+<span class="sourceLineNo">485</span> if (splitAlgo != null) {<a
name="line.485"></a>
+<span class="sourceLineNo">486</span> conf.set(SPLIT_ALGO,
splitAlgo.getClass().getName());<a name="line.486"></a>
+<span class="sourceLineNo">487</span> }<a name="line.487"></a>
+<span class="sourceLineNo">488</span> conf.setInt(NUM_SPLITS_PER_REGION,
numSplitsPerRegion);<a name="line.488"></a>
+<span class="sourceLineNo">489</span> Path rootDir =
FSUtils.getRootDir(conf);<a name="line.489"></a>
+<span class="sourceLineNo">490</span> FileSystem fs =
rootDir.getFileSystem(conf);<a name="line.490"></a>
+<span class="sourceLineNo">491</span><a name="line.491"></a>
+<span class="sourceLineNo">492</span> restoreDir = new Path(restoreDir,
UUID.randomUUID().toString());<a name="line.492"></a>
+<span class="sourceLineNo">493</span><a name="line.493"></a>
+<span class="sourceLineNo">494</span> // TODO: restore from record readers
to parallelize.<a name="line.494"></a>
+<span class="sourceLineNo">495</span>
RestoreSnapshotHelper.copySnapshotForScanner(conf, fs, rootDir, restoreDir,
snapshotName);<a name="line.495"></a>
+<span class="sourceLineNo">496</span><a name="line.496"></a>
+<span class="sourceLineNo">497</span> conf.set(RESTORE_DIR_KEY,
restoreDir.toString());<a name="line.497"></a>
+<span class="sourceLineNo">498</span> }<a name="line.498"></a>
+<span class="sourceLineNo">499</span>}<a name="line.499"></a>
