http://git-wip-us.apache.org/repos/asf/hbase-site/blob/d41f56fe/devapidocs/src-html/org/apache/hadoop/hbase/mapreduce/TableSnapshotInputFormat.html
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diff --git
a/devapidocs/src-html/org/apache/hadoop/hbase/mapreduce/TableSnapshotInputFormat.html
b/devapidocs/src-html/org/apache/hadoop/hbase/mapreduce/TableSnapshotInputFormat.html
index 2ff9932..94e2ffd 100644
---
a/devapidocs/src-html/org/apache/hadoop/hbase/mapreduce/TableSnapshotInputFormat.html
+++
b/devapidocs/src-html/org/apache/hadoop/hbase/mapreduce/TableSnapshotInputFormat.html
@@ -41,190 +41,210 @@
<span class="sourceLineNo">033</span>import
org.apache.hadoop.hbase.client.Scan;<a name="line.33"></a>
<span class="sourceLineNo">034</span>import
org.apache.hadoop.hbase.client.metrics.ScanMetrics;<a name="line.34"></a>
<span class="sourceLineNo">035</span>import
org.apache.hadoop.hbase.io.ImmutableBytesWritable;<a name="line.35"></a>
-<span class="sourceLineNo">036</span>import org.apache.hadoop.io.Writable;<a
name="line.36"></a>
-<span class="sourceLineNo">037</span>import
org.apache.hadoop.mapreduce.InputFormat;<a name="line.37"></a>
-<span class="sourceLineNo">038</span>import
org.apache.hadoop.mapreduce.InputSplit;<a name="line.38"></a>
-<span class="sourceLineNo">039</span>import org.apache.hadoop.mapreduce.Job;<a
name="line.39"></a>
-<span class="sourceLineNo">040</span>import
org.apache.hadoop.mapreduce.JobContext;<a name="line.40"></a>
-<span class="sourceLineNo">041</span>import
org.apache.hadoop.mapreduce.RecordReader;<a name="line.41"></a>
-<span class="sourceLineNo">042</span>import
org.apache.hadoop.mapreduce.TaskAttemptContext;<a name="line.42"></a>
-<span class="sourceLineNo">043</span>import
org.apache.yetus.audience.InterfaceAudience;<a name="line.43"></a>
-<span class="sourceLineNo">044</span><a name="line.44"></a>
-<span class="sourceLineNo">045</span>import
org.apache.hadoop.hbase.shaded.com.google.common.annotations.VisibleForTesting;<a
name="line.45"></a>
-<span class="sourceLineNo">046</span><a name="line.46"></a>
-<span class="sourceLineNo">047</span>/**<a name="line.47"></a>
-<span class="sourceLineNo">048</span> * TableSnapshotInputFormat allows a
MapReduce job to run over a table snapshot. The job<a name="line.48"></a>
-<span class="sourceLineNo">049</span> * bypasses HBase servers, and directly
accesses the underlying files (hfile, recovered edits,<a name="line.49"></a>
-<span class="sourceLineNo">050</span> * wals, etc) directly to provide maximum
performance. The snapshot is not required to be<a name="line.50"></a>
-<span class="sourceLineNo">051</span> * restored to the live cluster or
cloned. This also allows to run the mapreduce job from an<a name="line.51"></a>
-<span class="sourceLineNo">052</span> * online or offline hbase cluster. The
snapshot files can be exported by using the<a name="line.52"></a>
-<span class="sourceLineNo">053</span> * {@link
org.apache.hadoop.hbase.snapshot.ExportSnapshot} tool, to a pure-hdfs
cluster,<a name="line.53"></a>
-<span class="sourceLineNo">054</span> * and this InputFormat can be used to
run the mapreduce job directly over the snapshot files.<a name="line.54"></a>
-<span class="sourceLineNo">055</span> * The snapshot should not be deleted
while there are jobs reading from snapshot files.<a name="line.55"></a>
-<span class="sourceLineNo">056</span> * <p><a name="line.56"></a>
-<span class="sourceLineNo">057</span> * Usage is similar to TableInputFormat,
and<a name="line.57"></a>
-<span class="sourceLineNo">058</span> * {@link
TableMapReduceUtil#initTableSnapshotMapperJob(String, Scan, Class, Class,
Class, Job, boolean, Path)}<a name="line.58"></a>
-<span class="sourceLineNo">059</span> * can be used to configure the job.<a
name="line.59"></a>
-<span class="sourceLineNo">060</span> * <pre>{@code<a name="line.60"></a>
-<span class="sourceLineNo">061</span> * Job job = new Job(conf);<a
name="line.61"></a>
-<span class="sourceLineNo">062</span> * Scan scan = new Scan();<a
name="line.62"></a>
-<span class="sourceLineNo">063</span> *
TableMapReduceUtil.initTableSnapshotMapperJob(snapshotName,<a
name="line.63"></a>
-<span class="sourceLineNo">064</span> * scan, MyTableMapper.class,
MyMapKeyOutput.class,<a name="line.64"></a>
-<span class="sourceLineNo">065</span> * MyMapOutputValueWritable.class,
job, true);<a name="line.65"></a>
-<span class="sourceLineNo">066</span> * }<a name="line.66"></a>
-<span class="sourceLineNo">067</span> * </pre><a name="line.67"></a>
-<span class="sourceLineNo">068</span> * <p><a name="line.68"></a>
-<span class="sourceLineNo">069</span> * Internally, this input format restores
the snapshot into the given tmp directory. Similar to<a name="line.69"></a>
-<span class="sourceLineNo">070</span> * {@link TableInputFormat} an InputSplit
is created per region. The region is opened for reading<a name="line.70"></a>
-<span class="sourceLineNo">071</span> * from each RecordReader. An internal
RegionScanner is used to execute the<a name="line.71"></a>
-<span class="sourceLineNo">072</span> * {@link
org.apache.hadoop.hbase.CellScanner} obtained from the user.<a
name="line.72"></a>
-<span class="sourceLineNo">073</span> * <p><a name="line.73"></a>
-<span class="sourceLineNo">074</span> * HBase owns all the data and snapshot
files on the filesystem. Only the 'hbase' user can read from<a
name="line.74"></a>
-<span class="sourceLineNo">075</span> * snapshot files and data files.<a
name="line.75"></a>
-<span class="sourceLineNo">076</span> * To read from snapshot files directly
from the file system, the user who is running the MR job<a name="line.76"></a>
-<span class="sourceLineNo">077</span> * must have sufficient permissions to
access snapshot and reference files.<a name="line.77"></a>
-<span class="sourceLineNo">078</span> * This means that to run mapreduce over
snapshot files, the MR job has to be run as the HBase<a name="line.78"></a>
-<span class="sourceLineNo">079</span> * user or the user must have group or
other privileges in the filesystem (See HBASE-8369).<a name="line.79"></a>
-<span class="sourceLineNo">080</span> * Note that, given other users access to
read from snapshot/data files will completely circumvent<a name="line.80"></a>
-<span class="sourceLineNo">081</span> * the access control enforced by
HBase.<a name="line.81"></a>
-<span class="sourceLineNo">082</span> * @see
org.apache.hadoop.hbase.client.TableSnapshotScanner<a name="line.82"></a>
-<span class="sourceLineNo">083</span> */<a name="line.83"></a>
-<span class="sourceLineNo">084</span>@InterfaceAudience.Public<a
name="line.84"></a>
-<span class="sourceLineNo">085</span>public class TableSnapshotInputFormat
extends InputFormat<ImmutableBytesWritable, Result> {<a
name="line.85"></a>
-<span class="sourceLineNo">086</span><a name="line.86"></a>
-<span class="sourceLineNo">087</span> public static class
TableSnapshotRegionSplit extends InputSplit implements Writable {<a
name="line.87"></a>
-<span class="sourceLineNo">088</span> private
TableSnapshotInputFormatImpl.InputSplit delegate;<a name="line.88"></a>
+<span class="sourceLineNo">036</span>import
org.apache.hadoop.hbase.util.RegionSplitter;<a name="line.36"></a>
+<span class="sourceLineNo">037</span>import org.apache.hadoop.io.Writable;<a
name="line.37"></a>
+<span class="sourceLineNo">038</span>import
org.apache.hadoop.mapreduce.InputFormat;<a name="line.38"></a>
+<span class="sourceLineNo">039</span>import
org.apache.hadoop.mapreduce.InputSplit;<a name="line.39"></a>
+<span class="sourceLineNo">040</span>import org.apache.hadoop.mapreduce.Job;<a
name="line.40"></a>
+<span class="sourceLineNo">041</span>import
org.apache.hadoop.mapreduce.JobContext;<a name="line.41"></a>
+<span class="sourceLineNo">042</span>import
org.apache.hadoop.mapreduce.RecordReader;<a name="line.42"></a>
+<span class="sourceLineNo">043</span>import
org.apache.hadoop.mapreduce.TaskAttemptContext;<a name="line.43"></a>
+<span class="sourceLineNo">044</span>import
org.apache.yetus.audience.InterfaceAudience;<a name="line.44"></a>
+<span class="sourceLineNo">045</span><a name="line.45"></a>
+<span class="sourceLineNo">046</span>import
org.apache.hadoop.hbase.shaded.com.google.common.annotations.VisibleForTesting;<a
name="line.46"></a>
+<span class="sourceLineNo">047</span><a name="line.47"></a>
+<span class="sourceLineNo">048</span>/**<a name="line.48"></a>
+<span class="sourceLineNo">049</span> * TableSnapshotInputFormat allows a
MapReduce job to run over a table snapshot. The job<a name="line.49"></a>
+<span class="sourceLineNo">050</span> * bypasses HBase servers, and directly
accesses the underlying files (hfile, recovered edits,<a name="line.50"></a>
+<span class="sourceLineNo">051</span> * wals, etc) directly to provide maximum
performance. The snapshot is not required to be<a name="line.51"></a>
+<span class="sourceLineNo">052</span> * restored to the live cluster or
cloned. This also allows to run the mapreduce job from an<a name="line.52"></a>
+<span class="sourceLineNo">053</span> * online or offline hbase cluster. The
snapshot files can be exported by using the<a name="line.53"></a>
+<span class="sourceLineNo">054</span> * {@link
org.apache.hadoop.hbase.snapshot.ExportSnapshot} tool, to a pure-hdfs
cluster,<a name="line.54"></a>
+<span class="sourceLineNo">055</span> * and this InputFormat can be used to
run the mapreduce job directly over the snapshot files.<a name="line.55"></a>
+<span class="sourceLineNo">056</span> * The snapshot should not be deleted
while there are jobs reading from snapshot files.<a name="line.56"></a>
+<span class="sourceLineNo">057</span> * <p><a name="line.57"></a>
+<span class="sourceLineNo">058</span> * Usage is similar to TableInputFormat,
and<a name="line.58"></a>
+<span class="sourceLineNo">059</span> * {@link
TableMapReduceUtil#initTableSnapshotMapperJob(String, Scan, Class, Class,
Class, Job, boolean, Path)}<a name="line.59"></a>
+<span class="sourceLineNo">060</span> * can be used to configure the job.<a
name="line.60"></a>
+<span class="sourceLineNo">061</span> * <pre>{@code<a name="line.61"></a>
+<span class="sourceLineNo">062</span> * Job job = new Job(conf);<a
name="line.62"></a>
+<span class="sourceLineNo">063</span> * Scan scan = new Scan();<a
name="line.63"></a>
+<span class="sourceLineNo">064</span> *
TableMapReduceUtil.initTableSnapshotMapperJob(snapshotName,<a
name="line.64"></a>
+<span class="sourceLineNo">065</span> * scan, MyTableMapper.class,
MyMapKeyOutput.class,<a name="line.65"></a>
+<span class="sourceLineNo">066</span> * MyMapOutputValueWritable.class,
job, true);<a name="line.66"></a>
+<span class="sourceLineNo">067</span> * }<a name="line.67"></a>
+<span class="sourceLineNo">068</span> * </pre><a name="line.68"></a>
+<span class="sourceLineNo">069</span> * <p><a name="line.69"></a>
+<span class="sourceLineNo">070</span> * Internally, this input format restores
the snapshot into the given tmp directory. By default,<a name="line.70"></a>
+<span class="sourceLineNo">071</span> * and similar to {@link
TableInputFormat} an InputSplit is created per region, but optionally you<a
name="line.71"></a>
+<span class="sourceLineNo">072</span> * can run N mapper tasks per every
region, in which case the region key range will be split to<a
name="line.72"></a>
+<span class="sourceLineNo">073</span> * N sub-ranges and an InputSplit will be
created per sub-range. The region is opened for reading<a name="line.73"></a>
+<span class="sourceLineNo">074</span> * from each RecordReader. An internal
RegionScanner is used to execute the<a name="line.74"></a>
+<span class="sourceLineNo">075</span> * {@link
org.apache.hadoop.hbase.CellScanner} obtained from the user.<a
name="line.75"></a>
+<span class="sourceLineNo">076</span> * <p><a name="line.76"></a>
+<span class="sourceLineNo">077</span> * HBase owns all the data and snapshot
files on the filesystem. Only the 'hbase' user can read from<a
name="line.77"></a>
+<span class="sourceLineNo">078</span> * snapshot files and data files.<a
name="line.78"></a>
+<span class="sourceLineNo">079</span> * To read from snapshot files directly
from the file system, the user who is running the MR job<a name="line.79"></a>
+<span class="sourceLineNo">080</span> * must have sufficient permissions to
access snapshot and reference files.<a name="line.80"></a>
+<span class="sourceLineNo">081</span> * This means that to run mapreduce over
snapshot files, the MR job has to be run as the HBase<a name="line.81"></a>
+<span class="sourceLineNo">082</span> * user or the user must have group or
other privileges in the filesystem (See HBASE-8369).<a name="line.82"></a>
+<span class="sourceLineNo">083</span> * Note that, given other users access to
read from snapshot/data files will completely circumvent<a name="line.83"></a>
+<span class="sourceLineNo">084</span> * the access control enforced by
HBase.<a name="line.84"></a>
+<span class="sourceLineNo">085</span> * @see
org.apache.hadoop.hbase.client.TableSnapshotScanner<a name="line.85"></a>
+<span class="sourceLineNo">086</span> */<a name="line.86"></a>
+<span class="sourceLineNo">087</span>@InterfaceAudience.Public<a
name="line.87"></a>
+<span class="sourceLineNo">088</span>public class TableSnapshotInputFormat
extends InputFormat<ImmutableBytesWritable, Result> {<a
name="line.88"></a>
<span class="sourceLineNo">089</span><a name="line.89"></a>
-<span class="sourceLineNo">090</span> // constructor for mapreduce
framework / Writable<a name="line.90"></a>
-<span class="sourceLineNo">091</span> public TableSnapshotRegionSplit() {<a
name="line.91"></a>
-<span class="sourceLineNo">092</span> this.delegate = new
TableSnapshotInputFormatImpl.InputSplit();<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> public
TableSnapshotRegionSplit(TableSnapshotInputFormatImpl.InputSplit delegate) {<a
name="line.95"></a>
-<span class="sourceLineNo">096</span> this.delegate = delegate;<a
name="line.96"></a>
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-<span class="sourceLineNo">099</span> public
TableSnapshotRegionSplit(HTableDescriptor htd, HRegionInfo regionInfo,<a
name="line.99"></a>
-<span class="sourceLineNo">100</span> List<String> locations,
Scan scan, Path restoreDir) {<a name="line.100"></a>
-<span class="sourceLineNo">101</span> this.delegate =<a
name="line.101"></a>
-<span class="sourceLineNo">102</span> new
TableSnapshotInputFormatImpl.InputSplit(htd, regionInfo, locations, scan,
restoreDir);<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> @Override<a name="line.105"></a>
-<span class="sourceLineNo">106</span> public long getLength() throws
IOException, InterruptedException {<a name="line.106"></a>
-<span class="sourceLineNo">107</span> return delegate.getLength();<a
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-<span class="sourceLineNo">111</span> public String[] getLocations() throws
IOException, InterruptedException {<a name="line.111"></a>
-<span class="sourceLineNo">112</span> return delegate.getLocations();<a
name="line.112"></a>
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-<span class="sourceLineNo">115</span> @Override<a name="line.115"></a>
-<span class="sourceLineNo">116</span> public void write(DataOutput out)
throws IOException {<a name="line.116"></a>
-<span class="sourceLineNo">117</span> delegate.write(out);<a
name="line.117"></a>
-<span class="sourceLineNo">118</span> }<a name="line.118"></a>
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-<span class="sourceLineNo">120</span> @Override<a name="line.120"></a>
-<span class="sourceLineNo">121</span> public void readFields(DataInput in)
throws IOException {<a name="line.121"></a>
-<span class="sourceLineNo">122</span> delegate.readFields(in);<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> /**<a name="line.125"></a>
-<span class="sourceLineNo">126</span> * @deprecated As of release 2.0.0,
this will be removed in HBase 3.0.0<a name="line.126"></a>
-<span class="sourceLineNo">127</span> * Use {@link
#getRegion()}<a name="line.127"></a>
-<span class="sourceLineNo">128</span> */<a name="line.128"></a>
-<span class="sourceLineNo">129</span> @Deprecated<a name="line.129"></a>
-<span class="sourceLineNo">130</span> public HRegionInfo getRegionInfo()
{<a name="line.130"></a>
-<span class="sourceLineNo">131</span> return delegate.getRegionInfo();<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 RegionInfo getRegion() {<a
name="line.134"></a>
-<span class="sourceLineNo">135</span> return delegate.getRegionInfo();<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><a name="line.138"></a>
-<span class="sourceLineNo">139</span> @VisibleForTesting<a
name="line.139"></a>
-<span class="sourceLineNo">140</span> static class
TableSnapshotRegionRecordReader extends<a name="line.140"></a>
-<span class="sourceLineNo">141</span>
RecordReader<ImmutableBytesWritable, Result> {<a name="line.141"></a>
-<span class="sourceLineNo">142</span> private
TableSnapshotInputFormatImpl.RecordReader delegate =<a name="line.142"></a>
-<span class="sourceLineNo">143</span> new
TableSnapshotInputFormatImpl.RecordReader();<a name="line.143"></a>
-<span class="sourceLineNo">144</span> private TaskAttemptContext context;<a
name="line.144"></a>
-<span class="sourceLineNo">145</span> private Method getCounter;<a
name="line.145"></a>
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-<span class="sourceLineNo">147</span> @Override<a name="line.147"></a>
-<span class="sourceLineNo">148</span> public void initialize(InputSplit
split, TaskAttemptContext context) throws IOException,<a name="line.148"></a>
-<span class="sourceLineNo">149</span> InterruptedException {<a
name="line.149"></a>
-<span class="sourceLineNo">150</span> this.context = context;<a
name="line.150"></a>
-<span class="sourceLineNo">151</span> getCounter =
TableRecordReaderImpl.retrieveGetCounterWithStringsParams(context);<a
name="line.151"></a>
-<span class="sourceLineNo">152</span> delegate.initialize(<a
name="line.152"></a>
-<span class="sourceLineNo">153</span> ((TableSnapshotRegionSplit)
split).delegate,<a name="line.153"></a>
-<span class="sourceLineNo">154</span> context.getConfiguration());<a
name="line.154"></a>
-<span class="sourceLineNo">155</span> }<a name="line.155"></a>
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-<span class="sourceLineNo">157</span> @Override<a name="line.157"></a>
-<span class="sourceLineNo">158</span> public boolean nextKeyValue() throws
IOException, InterruptedException {<a name="line.158"></a>
-<span class="sourceLineNo">159</span> boolean result =
delegate.nextKeyValue();<a name="line.159"></a>
-<span class="sourceLineNo">160</span> if (result) {<a name="line.160"></a>
-<span class="sourceLineNo">161</span> ScanMetrics scanMetrics =
delegate.getScanner().getScanMetrics();<a name="line.161"></a>
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&& context != null) {<a name="line.162"></a>
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TableRecordReaderImpl.updateCounters(scanMetrics, 0, getCounter, context, 0);<a
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getCurrentKey() throws IOException, InterruptedException {<a
name="line.170"></a>
-<span class="sourceLineNo">171</span> return delegate.getCurrentKey();<a
name="line.171"></a>
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-<span class="sourceLineNo">174</span> @Override<a name="line.174"></a>
-<span class="sourceLineNo">175</span> public Result getCurrentValue()
throws IOException, InterruptedException {<a name="line.175"></a>
-<span class="sourceLineNo">176</span> return
delegate.getCurrentValue();<a name="line.176"></a>
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IOException, InterruptedException {<a name="line.180"></a>
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IOException {<a name="line.185"></a>
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-<span class="sourceLineNo">190</span> @Override<a name="line.190"></a>
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RecordReader<ImmutableBytesWritable, Result> createRecordReader(<a
name="line.191"></a>
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TaskAttemptContext context) throws IOException {<a name="line.192"></a>
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TableSnapshotRegionRecordReader();<a name="line.193"></a>
-<span class="sourceLineNo">194</span> }<a name="line.194"></a>
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getSplits(JobContext job) throws IOException, InterruptedException {<a
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ArrayList<>();<a name="line.198"></a>
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(TableSnapshotInputFormatImpl.InputSplit split :<a name="line.199"></a>
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TableSnapshotInputFormatImpl.getSplits(job.getConfiguration())) {<a
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TableSnapshotInputFormatImpl.setInput(job.getConfiguration(), snapshotName,
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TableSnapshotRegionSplit extends InputSplit implements Writable {<a
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TableSnapshotRegionSplit(TableSnapshotInputFormatImpl.InputSplit delegate) {<a
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TableSnapshotRegionSplit(HTableDescriptor htd, HRegionInfo regionInfo,<a
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TableSnapshotInputFormatImpl.InputSplit(htd, regionInfo, locations, scan,
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throws IOException {<a name="line.119"></a>
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TableSnapshotRegionRecordReader extends<a name="line.143"></a>
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RecordReader<ImmutableBytesWritable, Result> {<a name="line.144"></a>
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split).delegate,<a name="line.156"></a>
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name="line.157"></a>
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getCurrentKey() throws IOException, InterruptedException {<a
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String snapshotName, Path restoreDir)<a name="line.218"></a>
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name="line.219"></a>
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TableSnapshotInputFormatImpl.setInput(job.getConfiguration(), snapshotName,
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+<span class="sourceLineNo">222</span><a name="line.222"></a>
+<span class="sourceLineNo">223</span> /**<a name="line.223"></a>
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TableSnapshotInputFormat to read from a snapshot.<a name="line.224"></a>
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directory to restore the snapshot into. Current user should<a
name="line.227"></a>
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directory, and this should not be a subdirectory of rootdir.<a
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RegionSplitter.SplitAlgorithm splitAlgo, int numSplitsPerRegion) throws
IOException {<a name="line.235"></a>
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TableSnapshotInputFormatImpl.setInput(job.getConfiguration(), snapshotName,
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numSplitsPerRegion);<a name="line.237"></a>
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