You are viewing a plain text version of this content. The canonical link for it is here.
Posted to commits@hbase.apache.org by gi...@apache.org on 2018/05/18 14:48:02 UTC
[19/29] hbase-site git commit: Published site at
c9f8c3436f6e38b5c7807677c5c3e7fc3e19e071.
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/ead846d7/devapidocs/src-html/org/apache/hadoop/hbase/snapshot/ExportSnapshot.ExportMapper.html
----------------------------------------------------------------------
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/snapshot/ExportSnapshot.ExportMapper.html b/devapidocs/src-html/org/apache/hadoop/hbase/snapshot/ExportSnapshot.ExportMapper.html
index 6ab40ed..b77fb8a 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/snapshot/ExportSnapshot.ExportMapper.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/snapshot/ExportSnapshot.ExportMapper.html
@@ -37,1086 +37,1114 @@
<span class="sourceLineNo">029</span>import java.util.Comparator;<a name="line.29"></a>
<span class="sourceLineNo">030</span>import java.util.LinkedList;<a name="line.30"></a>
<span class="sourceLineNo">031</span>import java.util.List;<a name="line.31"></a>
-<span class="sourceLineNo">032</span><a name="line.32"></a>
-<span class="sourceLineNo">033</span>import org.apache.hadoop.conf.Configuration;<a name="line.33"></a>
-<span class="sourceLineNo">034</span>import org.apache.hadoop.fs.FSDataInputStream;<a name="line.34"></a>
-<span class="sourceLineNo">035</span>import org.apache.hadoop.fs.FSDataOutputStream;<a name="line.35"></a>
-<span class="sourceLineNo">036</span>import org.apache.hadoop.fs.FileChecksum;<a name="line.36"></a>
-<span class="sourceLineNo">037</span>import org.apache.hadoop.fs.FileStatus;<a name="line.37"></a>
-<span class="sourceLineNo">038</span>import org.apache.hadoop.fs.FileSystem;<a name="line.38"></a>
-<span class="sourceLineNo">039</span>import org.apache.hadoop.fs.FileUtil;<a name="line.39"></a>
-<span class="sourceLineNo">040</span>import org.apache.hadoop.fs.Path;<a name="line.40"></a>
-<span class="sourceLineNo">041</span>import org.apache.hadoop.fs.permission.FsPermission;<a name="line.41"></a>
-<span class="sourceLineNo">042</span>import org.apache.hadoop.hbase.HBaseConfiguration;<a name="line.42"></a>
-<span class="sourceLineNo">043</span>import org.apache.hadoop.hbase.HConstants;<a name="line.43"></a>
-<span class="sourceLineNo">044</span>import org.apache.hadoop.hbase.TableName;<a name="line.44"></a>
-<span class="sourceLineNo">045</span>import org.apache.hadoop.hbase.client.RegionInfo;<a name="line.45"></a>
-<span class="sourceLineNo">046</span>import org.apache.hadoop.hbase.io.FileLink;<a name="line.46"></a>
-<span class="sourceLineNo">047</span>import org.apache.hadoop.hbase.io.HFileLink;<a name="line.47"></a>
-<span class="sourceLineNo">048</span>import org.apache.hadoop.hbase.io.WALLink;<a name="line.48"></a>
-<span class="sourceLineNo">049</span>import org.apache.hadoop.hbase.io.hadoopbackport.ThrottledInputStream;<a name="line.49"></a>
-<span class="sourceLineNo">050</span>import org.apache.hadoop.hbase.mapreduce.TableMapReduceUtil;<a name="line.50"></a>
-<span class="sourceLineNo">051</span>import org.apache.hadoop.hbase.mob.MobUtils;<a name="line.51"></a>
-<span class="sourceLineNo">052</span>import org.apache.hadoop.hbase.util.AbstractHBaseTool;<a name="line.52"></a>
-<span class="sourceLineNo">053</span>import org.apache.hadoop.hbase.util.FSUtils;<a name="line.53"></a>
-<span class="sourceLineNo">054</span>import org.apache.hadoop.hbase.util.HFileArchiveUtil;<a name="line.54"></a>
-<span class="sourceLineNo">055</span>import org.apache.hadoop.hbase.util.Pair;<a name="line.55"></a>
-<span class="sourceLineNo">056</span>import org.apache.hadoop.io.BytesWritable;<a name="line.56"></a>
-<span class="sourceLineNo">057</span>import org.apache.hadoop.io.IOUtils;<a name="line.57"></a>
-<span class="sourceLineNo">058</span>import org.apache.hadoop.io.NullWritable;<a name="line.58"></a>
-<span class="sourceLineNo">059</span>import org.apache.hadoop.io.Writable;<a name="line.59"></a>
-<span class="sourceLineNo">060</span>import org.apache.hadoop.mapreduce.InputFormat;<a name="line.60"></a>
-<span class="sourceLineNo">061</span>import org.apache.hadoop.mapreduce.InputSplit;<a name="line.61"></a>
-<span class="sourceLineNo">062</span>import org.apache.hadoop.mapreduce.Job;<a name="line.62"></a>
-<span class="sourceLineNo">063</span>import org.apache.hadoop.mapreduce.JobContext;<a name="line.63"></a>
-<span class="sourceLineNo">064</span>import org.apache.hadoop.mapreduce.Mapper;<a name="line.64"></a>
-<span class="sourceLineNo">065</span>import org.apache.hadoop.mapreduce.RecordReader;<a name="line.65"></a>
-<span class="sourceLineNo">066</span>import org.apache.hadoop.mapreduce.TaskAttemptContext;<a name="line.66"></a>
-<span class="sourceLineNo">067</span>import org.apache.hadoop.mapreduce.lib.output.NullOutputFormat;<a name="line.67"></a>
-<span class="sourceLineNo">068</span>import org.apache.hadoop.mapreduce.security.TokenCache;<a name="line.68"></a>
-<span class="sourceLineNo">069</span>import org.apache.hadoop.util.StringUtils;<a name="line.69"></a>
-<span class="sourceLineNo">070</span>import org.apache.hadoop.util.Tool;<a name="line.70"></a>
-<span class="sourceLineNo">071</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.71"></a>
-<span class="sourceLineNo">072</span>import org.slf4j.Logger;<a name="line.72"></a>
-<span class="sourceLineNo">073</span>import org.slf4j.LoggerFactory;<a name="line.73"></a>
-<span class="sourceLineNo">074</span>import org.apache.hbase.thirdparty.org.apache.commons.cli.CommandLine;<a name="line.74"></a>
-<span class="sourceLineNo">075</span>import org.apache.hbase.thirdparty.org.apache.commons.cli.Option;<a name="line.75"></a>
-<span class="sourceLineNo">076</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.SnapshotProtos.SnapshotDescription;<a name="line.76"></a>
-<span class="sourceLineNo">077</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.SnapshotProtos.SnapshotFileInfo;<a name="line.77"></a>
-<span class="sourceLineNo">078</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.SnapshotProtos.SnapshotRegionManifest;<a name="line.78"></a>
-<span class="sourceLineNo">079</span><a name="line.79"></a>
-<span class="sourceLineNo">080</span>/**<a name="line.80"></a>
-<span class="sourceLineNo">081</span> * Export the specified snapshot to a given FileSystem.<a name="line.81"></a>
-<span class="sourceLineNo">082</span> *<a name="line.82"></a>
-<span class="sourceLineNo">083</span> * The .snapshot/name folder is copied to the destination cluster<a name="line.83"></a>
-<span class="sourceLineNo">084</span> * and then all the hfiles/wals are copied using a Map-Reduce Job in the .archive/ location.<a name="line.84"></a>
-<span class="sourceLineNo">085</span> * When everything is done, the second cluster can restore the snapshot.<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 ExportSnapshot extends AbstractHBaseTool implements Tool {<a name="line.88"></a>
-<span class="sourceLineNo">089</span> public static final String NAME = "exportsnapshot";<a name="line.89"></a>
-<span class="sourceLineNo">090</span> /** Configuration prefix for overrides for the source filesystem */<a name="line.90"></a>
-<span class="sourceLineNo">091</span> public static final String CONF_SOURCE_PREFIX = NAME + ".from.";<a name="line.91"></a>
-<span class="sourceLineNo">092</span> /** Configuration prefix for overrides for the destination filesystem */<a name="line.92"></a>
-<span class="sourceLineNo">093</span> public static final String CONF_DEST_PREFIX = NAME + ".to.";<a name="line.93"></a>
-<span class="sourceLineNo">094</span><a name="line.94"></a>
-<span class="sourceLineNo">095</span> private static final Logger LOG = LoggerFactory.getLogger(ExportSnapshot.class);<a name="line.95"></a>
-<span class="sourceLineNo">096</span><a name="line.96"></a>
-<span class="sourceLineNo">097</span> private static final String MR_NUM_MAPS = "mapreduce.job.maps";<a name="line.97"></a>
-<span class="sourceLineNo">098</span> private static final String CONF_NUM_SPLITS = "snapshot.export.format.splits";<a name="line.98"></a>
-<span class="sourceLineNo">099</span> private static final String CONF_SNAPSHOT_NAME = "snapshot.export.format.snapshot.name";<a name="line.99"></a>
-<span class="sourceLineNo">100</span> private static final String CONF_SNAPSHOT_DIR = "snapshot.export.format.snapshot.dir";<a name="line.100"></a>
-<span class="sourceLineNo">101</span> private static final String CONF_FILES_USER = "snapshot.export.files.attributes.user";<a name="line.101"></a>
-<span class="sourceLineNo">102</span> private static final String CONF_FILES_GROUP = "snapshot.export.files.attributes.group";<a name="line.102"></a>
-<span class="sourceLineNo">103</span> private static final String CONF_FILES_MODE = "snapshot.export.files.attributes.mode";<a name="line.103"></a>
-<span class="sourceLineNo">104</span> private static final String CONF_CHECKSUM_VERIFY = "snapshot.export.checksum.verify";<a name="line.104"></a>
-<span class="sourceLineNo">105</span> private static final String CONF_OUTPUT_ROOT = "snapshot.export.output.root";<a name="line.105"></a>
-<span class="sourceLineNo">106</span> private static final String CONF_INPUT_ROOT = "snapshot.export.input.root";<a name="line.106"></a>
-<span class="sourceLineNo">107</span> private static final String CONF_BUFFER_SIZE = "snapshot.export.buffer.size";<a name="line.107"></a>
-<span class="sourceLineNo">108</span> private static final String CONF_MAP_GROUP = "snapshot.export.default.map.group";<a name="line.108"></a>
-<span class="sourceLineNo">109</span> private static final String CONF_BANDWIDTH_MB = "snapshot.export.map.bandwidth.mb";<a name="line.109"></a>
-<span class="sourceLineNo">110</span> private static final String CONF_MR_JOB_NAME = "mapreduce.job.name";<a name="line.110"></a>
-<span class="sourceLineNo">111</span> protected static final String CONF_SKIP_TMP = "snapshot.export.skip.tmp";<a name="line.111"></a>
-<span class="sourceLineNo">112</span><a name="line.112"></a>
-<span class="sourceLineNo">113</span> static class Testing {<a name="line.113"></a>
-<span class="sourceLineNo">114</span> static final String CONF_TEST_FAILURE = "test.snapshot.export.failure";<a name="line.114"></a>
-<span class="sourceLineNo">115</span> static final String CONF_TEST_FAILURE_COUNT = "test.snapshot.export.failure.count";<a name="line.115"></a>
-<span class="sourceLineNo">116</span> int failuresCountToInject = 0;<a name="line.116"></a>
-<span class="sourceLineNo">117</span> int injectedFailureCount = 0;<a name="line.117"></a>
-<span class="sourceLineNo">118</span> }<a name="line.118"></a>
-<span class="sourceLineNo">119</span><a name="line.119"></a>
-<span class="sourceLineNo">120</span> // Command line options and defaults.<a name="line.120"></a>
-<span class="sourceLineNo">121</span> static final class Options {<a name="line.121"></a>
-<span class="sourceLineNo">122</span> static final Option SNAPSHOT = new Option(null, "snapshot", true, "Snapshot to restore.");<a name="line.122"></a>
-<span class="sourceLineNo">123</span> static final Option TARGET_NAME = new Option(null, "target", true,<a name="line.123"></a>
-<span class="sourceLineNo">124</span> "Target name for the snapshot.");<a name="line.124"></a>
-<span class="sourceLineNo">125</span> static final Option COPY_TO = new Option(null, "copy-to", true, "Remote "<a name="line.125"></a>
-<span class="sourceLineNo">126</span> + "destination hdfs://");<a name="line.126"></a>
-<span class="sourceLineNo">127</span> static final Option COPY_FROM = new Option(null, "copy-from", true,<a name="line.127"></a>
-<span class="sourceLineNo">128</span> "Input folder hdfs:// (default hbase.rootdir)");<a name="line.128"></a>
-<span class="sourceLineNo">129</span> static final Option NO_CHECKSUM_VERIFY = new Option(null, "no-checksum-verify", false,<a name="line.129"></a>
-<span class="sourceLineNo">130</span> "Do not verify checksum, use name+length only.");<a name="line.130"></a>
-<span class="sourceLineNo">131</span> static final Option NO_TARGET_VERIFY = new Option(null, "no-target-verify", false,<a name="line.131"></a>
-<span class="sourceLineNo">132</span> "Do not verify the integrity of the exported snapshot.");<a name="line.132"></a>
-<span class="sourceLineNo">133</span> static final Option OVERWRITE = new Option(null, "overwrite", false,<a name="line.133"></a>
-<span class="sourceLineNo">134</span> "Rewrite the snapshot manifest if already exists.");<a name="line.134"></a>
-<span class="sourceLineNo">135</span> static final Option CHUSER = new Option(null, "chuser", true,<a name="line.135"></a>
-<span class="sourceLineNo">136</span> "Change the owner of the files to the specified one.");<a name="line.136"></a>
-<span class="sourceLineNo">137</span> static final Option CHGROUP = new Option(null, "chgroup", true,<a name="line.137"></a>
-<span class="sourceLineNo">138</span> "Change the group of the files to the specified one.");<a name="line.138"></a>
-<span class="sourceLineNo">139</span> static final Option CHMOD = new Option(null, "chmod", true,<a name="line.139"></a>
-<span class="sourceLineNo">140</span> "Change the permission of the files to the specified one.");<a name="line.140"></a>
-<span class="sourceLineNo">141</span> static final Option MAPPERS = new Option(null, "mappers", true,<a name="line.141"></a>
-<span class="sourceLineNo">142</span> "Number of mappers to use during the copy (mapreduce.job.maps).");<a name="line.142"></a>
-<span class="sourceLineNo">143</span> static final Option BANDWIDTH = new Option(null, "bandwidth", true,<a name="line.143"></a>
-<span class="sourceLineNo">144</span> "Limit bandwidth to this value in MB/second.");<a name="line.144"></a>
-<span class="sourceLineNo">145</span> }<a name="line.145"></a>
-<span class="sourceLineNo">146</span><a name="line.146"></a>
-<span class="sourceLineNo">147</span> // Export Map-Reduce Counters, to keep track of the progress<a name="line.147"></a>
-<span class="sourceLineNo">148</span> public enum Counter {<a name="line.148"></a>
-<span class="sourceLineNo">149</span> MISSING_FILES, FILES_COPIED, FILES_SKIPPED, COPY_FAILED,<a name="line.149"></a>
-<span class="sourceLineNo">150</span> BYTES_EXPECTED, BYTES_SKIPPED, BYTES_COPIED<a name="line.150"></a>
-<span class="sourceLineNo">151</span> }<a name="line.151"></a>
-<span class="sourceLineNo">152</span><a name="line.152"></a>
-<span class="sourceLineNo">153</span> private static class ExportMapper extends Mapper<BytesWritable, NullWritable,<a name="line.153"></a>
-<span class="sourceLineNo">154</span> NullWritable, NullWritable> {<a name="line.154"></a>
-<span class="sourceLineNo">155</span> private static final Logger LOG = LoggerFactory.getLogger(ExportMapper.class);<a name="line.155"></a>
-<span class="sourceLineNo">156</span> final static int REPORT_SIZE = 1 * 1024 * 1024;<a name="line.156"></a>
-<span class="sourceLineNo">157</span> final static int BUFFER_SIZE = 64 * 1024;<a name="line.157"></a>
-<span class="sourceLineNo">158</span><a name="line.158"></a>
-<span class="sourceLineNo">159</span> private boolean verifyChecksum;<a name="line.159"></a>
-<span class="sourceLineNo">160</span> private String filesGroup;<a name="line.160"></a>
-<span class="sourceLineNo">161</span> private String filesUser;<a name="line.161"></a>
-<span class="sourceLineNo">162</span> private short filesMode;<a name="line.162"></a>
-<span class="sourceLineNo">163</span> private int bufferSize;<a name="line.163"></a>
-<span class="sourceLineNo">164</span><a name="line.164"></a>
-<span class="sourceLineNo">165</span> private FileSystem outputFs;<a name="line.165"></a>
-<span class="sourceLineNo">166</span> private Path outputArchive;<a name="line.166"></a>
-<span class="sourceLineNo">167</span> private Path outputRoot;<a name="line.167"></a>
-<span class="sourceLineNo">168</span><a name="line.168"></a>
-<span class="sourceLineNo">169</span> private FileSystem inputFs;<a name="line.169"></a>
-<span class="sourceLineNo">170</span> private Path inputArchive;<a name="line.170"></a>
-<span class="sourceLineNo">171</span> private Path inputRoot;<a name="line.171"></a>
+<span class="sourceLineNo">032</span>import java.util.concurrent.ExecutionException;<a name="line.32"></a>
+<span class="sourceLineNo">033</span>import java.util.concurrent.ExecutorService;<a name="line.33"></a>
+<span class="sourceLineNo">034</span>import java.util.concurrent.Executors;<a name="line.34"></a>
+<span class="sourceLineNo">035</span>import java.util.concurrent.Future;<a name="line.35"></a>
+<span class="sourceLineNo">036</span>import java.util.function.BiConsumer;<a name="line.36"></a>
+<span class="sourceLineNo">037</span><a name="line.37"></a>
+<span class="sourceLineNo">038</span>import org.apache.hadoop.conf.Configuration;<a name="line.38"></a>
+<span class="sourceLineNo">039</span>import org.apache.hadoop.fs.FSDataInputStream;<a name="line.39"></a>
+<span class="sourceLineNo">040</span>import org.apache.hadoop.fs.FSDataOutputStream;<a name="line.40"></a>
+<span class="sourceLineNo">041</span>import org.apache.hadoop.fs.FileChecksum;<a name="line.41"></a>
+<span class="sourceLineNo">042</span>import org.apache.hadoop.fs.FileStatus;<a name="line.42"></a>
+<span class="sourceLineNo">043</span>import org.apache.hadoop.fs.FileSystem;<a name="line.43"></a>
+<span class="sourceLineNo">044</span>import org.apache.hadoop.fs.Path;<a name="line.44"></a>
+<span class="sourceLineNo">045</span>import org.apache.hadoop.fs.permission.FsPermission;<a name="line.45"></a>
+<span class="sourceLineNo">046</span>import org.apache.hadoop.hbase.HBaseConfiguration;<a name="line.46"></a>
+<span class="sourceLineNo">047</span>import org.apache.hadoop.hbase.HConstants;<a name="line.47"></a>
+<span class="sourceLineNo">048</span>import org.apache.hadoop.hbase.TableName;<a name="line.48"></a>
+<span class="sourceLineNo">049</span>import org.apache.hadoop.hbase.client.RegionInfo;<a name="line.49"></a>
+<span class="sourceLineNo">050</span>import org.apache.hadoop.hbase.io.FileLink;<a name="line.50"></a>
+<span class="sourceLineNo">051</span>import org.apache.hadoop.hbase.io.HFileLink;<a name="line.51"></a>
+<span class="sourceLineNo">052</span>import org.apache.hadoop.hbase.io.WALLink;<a name="line.52"></a>
+<span class="sourceLineNo">053</span>import org.apache.hadoop.hbase.io.hadoopbackport.ThrottledInputStream;<a name="line.53"></a>
+<span class="sourceLineNo">054</span>import org.apache.hadoop.hbase.mapreduce.TableMapReduceUtil;<a name="line.54"></a>
+<span class="sourceLineNo">055</span>import org.apache.hadoop.hbase.mob.MobUtils;<a name="line.55"></a>
+<span class="sourceLineNo">056</span>import org.apache.hadoop.hbase.util.AbstractHBaseTool;<a name="line.56"></a>
+<span class="sourceLineNo">057</span>import org.apache.hadoop.hbase.util.FSUtils;<a name="line.57"></a>
+<span class="sourceLineNo">058</span>import org.apache.hadoop.hbase.util.HFileArchiveUtil;<a name="line.58"></a>
+<span class="sourceLineNo">059</span>import org.apache.hadoop.hbase.util.Pair;<a name="line.59"></a>
+<span class="sourceLineNo">060</span>import org.apache.hadoop.io.BytesWritable;<a name="line.60"></a>
+<span class="sourceLineNo">061</span>import org.apache.hadoop.io.IOUtils;<a name="line.61"></a>
+<span class="sourceLineNo">062</span>import org.apache.hadoop.io.NullWritable;<a name="line.62"></a>
+<span class="sourceLineNo">063</span>import org.apache.hadoop.io.Writable;<a name="line.63"></a>
+<span class="sourceLineNo">064</span>import org.apache.hadoop.mapreduce.InputFormat;<a name="line.64"></a>
+<span class="sourceLineNo">065</span>import org.apache.hadoop.mapreduce.InputSplit;<a name="line.65"></a>
+<span class="sourceLineNo">066</span>import org.apache.hadoop.mapreduce.Job;<a name="line.66"></a>
+<span class="sourceLineNo">067</span>import org.apache.hadoop.mapreduce.JobContext;<a name="line.67"></a>
+<span class="sourceLineNo">068</span>import org.apache.hadoop.mapreduce.Mapper;<a name="line.68"></a>
+<span class="sourceLineNo">069</span>import org.apache.hadoop.mapreduce.RecordReader;<a name="line.69"></a>
+<span class="sourceLineNo">070</span>import org.apache.hadoop.mapreduce.TaskAttemptContext;<a name="line.70"></a>
+<span class="sourceLineNo">071</span>import org.apache.hadoop.mapreduce.lib.output.NullOutputFormat;<a name="line.71"></a>
+<span class="sourceLineNo">072</span>import org.apache.hadoop.mapreduce.security.TokenCache;<a name="line.72"></a>
+<span class="sourceLineNo">073</span>import org.apache.hadoop.util.StringUtils;<a name="line.73"></a>
+<span class="sourceLineNo">074</span>import org.apache.hadoop.util.Tool;<a name="line.74"></a>
+<span class="sourceLineNo">075</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.75"></a>
+<span class="sourceLineNo">076</span>import org.slf4j.Logger;<a name="line.76"></a>
+<span class="sourceLineNo">077</span>import org.slf4j.LoggerFactory;<a name="line.77"></a>
+<span class="sourceLineNo">078</span>import org.apache.hbase.thirdparty.org.apache.commons.cli.CommandLine;<a name="line.78"></a>
+<span class="sourceLineNo">079</span>import org.apache.hbase.thirdparty.org.apache.commons.cli.Option;<a name="line.79"></a>
+<span class="sourceLineNo">080</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.SnapshotProtos.SnapshotDescription;<a name="line.80"></a>
+<span class="sourceLineNo">081</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.SnapshotProtos.SnapshotFileInfo;<a name="line.81"></a>
+<span class="sourceLineNo">082</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.SnapshotProtos.SnapshotRegionManifest;<a name="line.82"></a>
+<span class="sourceLineNo">083</span><a name="line.83"></a>
+<span class="sourceLineNo">084</span>/**<a name="line.84"></a>
+<span class="sourceLineNo">085</span> * Export the specified snapshot to a given FileSystem.<a name="line.85"></a>
+<span class="sourceLineNo">086</span> *<a name="line.86"></a>
+<span class="sourceLineNo">087</span> * The .snapshot/name folder is copied to the destination cluster<a name="line.87"></a>
+<span class="sourceLineNo">088</span> * and then all the hfiles/wals are copied using a Map-Reduce Job in the .archive/ location.<a name="line.88"></a>
+<span class="sourceLineNo">089</span> * When everything is done, the second cluster can restore the snapshot.<a name="line.89"></a>
+<span class="sourceLineNo">090</span> */<a name="line.90"></a>
+<span class="sourceLineNo">091</span>@InterfaceAudience.Public<a name="line.91"></a>
+<span class="sourceLineNo">092</span>public class ExportSnapshot extends AbstractHBaseTool implements Tool {<a name="line.92"></a>
+<span class="sourceLineNo">093</span> public static final String NAME = "exportsnapshot";<a name="line.93"></a>
+<span class="sourceLineNo">094</span> /** Configuration prefix for overrides for the source filesystem */<a name="line.94"></a>
+<span class="sourceLineNo">095</span> public static final String CONF_SOURCE_PREFIX = NAME + ".from.";<a name="line.95"></a>
+<span class="sourceLineNo">096</span> /** Configuration prefix for overrides for the destination filesystem */<a name="line.96"></a>
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+<span class="sourceLineNo">098</span><a name="line.98"></a>
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