title: HBase regions automatic splitting using hbase.hregion.max.filesize
body: <p>I'm using the cloudera distribution of HBase (hbase-0.94.6-cdh4.5.0) and the cloudera manager to set up all cluster's configurations.</p>
  
  <p>I have set up the following property for HBase:</p>
  
  <pre><code>&lt;property&gt;
  &lt;name&gt;hbase.hregion.max.filesize&lt;/name&gt;
  &lt;value&gt;10737418240&lt;/value&gt;
  &lt;source&gt;hbase-default.xml&lt;/source&gt;
  &lt;/property&gt;
  </code></pre>
  
  <p><strong><em>NB:</em></strong> 10737418240 &lt;=> 10G</p>
  
  <p>So, according to all documentation I read, data should be accumulated into a single region until the region size reached 10G.</p>
  
  <p>But, it doesn't seem to work...
  Maybe I miss something...</p>
  
  <p>Here is all regions of my hbase table and their size:</p>
  
  <p><code>root@hadoopmaster01:~# hdfs dfs -du -h /hbase/my_table
  719      /hbase/my_table/.tableinfo.0000000001
  0        /hbase/my_table/.tmp
  222.2 M  /hbase/my_table/08e225d0ae802ef805fff65c89a15de6
  602.7 M  /hbase/my_table/0f3bb09af53ebdf5e538b50d7f08786e
  735.1 M  /hbase/my_table/1152669b3ef439f08614e3785451c305
  2.8 G    /hbase/my_table/1203fbc208fc93a702c67130047a1e4f
  379.3 M  /hbase/my_table/1742b0e038ece763184829e25067f138
  7.3 G    /hbase/my_table/194eae40d50554ce39c82dd8b2785d96
  627.1 M  /hbase/my_table/28aa1df8140f4eb289db76a17c583028
  274.6 M  /hbase/my_table/2f55b9760dbcaefca0e1064ce5da6f48
  1.5 G    /hbase/my_table/392f6070132ec9505d7aaecdc1202418
  1.5 G    /hbase/my_table/4396a8d8c5663de237574b967bf49b8a
  1.6 G    /hbase/my_table/440964e857d9beee1c24104bd96b7d5c
  1.5 G    /hbase/my_table/533369f47a365ab06f863d02c88f89e2
  2.5 G    /hbase/my_table/6d86b7199c128ae891b84fd9b1ccfd6e
  1.2 G    /hbase/my_table/6e5e6878028841c4d1f4c3b64d04698b
  1.6 G    /hbase/my_table/7dc1c717de025f3c15aa087cda5f76d2
  200.2 M  /hbase/my_table/8157d48f833bb3b708726c703874569d
  118.0 M  /hbase/my_table/85fb1d24bf9d03d748f615d3907589f2
  2.0 G    /hbase/my_table/94dd01c81c73dc35c02b6bd2c17d8d22
  265.1 M  /hbase/my_table/990d5adb14b2d1c936bd4a9c726f8e03
  335.0 M  /hbase/my_table/a9b673c142346014e01d7cf579b0e58a
  502.1 M  /hbase/my_table/ae3b1f6f537826f1bdb31bfc89d8ff9a
  763.3 M  /hbase/my_table/b6039c539b6cca2826022f863ed76c7b
  470.7 M  /hbase/my_table/be091ead2a408df55999950dcff6e7bc
  5.9 G    /hbase/my_table/c176cf8c19cc0fffab2af63ee7d1ca45
  512.0 M  /hbase/my_table/cb622a8a55ba575549759514281d5841
  1.9 G    /hbase/my_table/d201d1630ffdf08e4114dfc691488372
  787.9 M  /hbase/my_table/d78b4f682bb8e666488b06d0fd00ef9b
  862.8 M  /hbase/my_table/edd72e02de2a90aab086acd296d7da2b
  627.5 M  /hbase/my_table/f13a251ff7154f522e47bd54f0d1f921
  1.3 G    /hbase/my_table/fde68ec48d68e7f61a0258b7f8898be4</code></p>
  
  <p>As you can see, there is a lot of regions and any of them has a size close to 10G...</p>
  
  <p>If someone has been faced to this kind of issue or know if there is an other configuration to set up, please help me!</p>
  
  <p>Thx</p>