I set "hbase.hregion.max.filesize" to 9223372036854775807. When an average region size on HDFS reaches 6G, i split all the regions in my hbase table by using hbase java api HBaseAdmin.split. Before i do split, there are 1000 regions in my table, and when the split is finished, there a 2000 region is available as expected. But on the HDFS, there are 3000 region directories in the /hbase/tablename/columnfamily/*. Can hbase delete the old regions after region split automatically?
*b2fb55650a67b28b791be4d6f813de8a *is one of the original regions before split, and the hbase master log is shown as follows: [hadoop@master3-hbase logs]$ grep b2fb55650a67b28b791be4d6f813de8a hbase-hadoop-master-master3-hbase.sii.cn.log 11/11/17 17:04:58 INFO master.ServerManager: Received REGION_SPLIT: pageDB,4a7ef985,1320941062356.*b2fb55650a67b28b791be4d6f813de8a*.: Daughters; pageDB,4a7ef985,1321520697601.aa5828bfb105e1109aa676e5361b1793., pageDB,4a9fd9f59468cba2e7d210f41811e349,1321520697601.b0b4e65db3251fc48dc70c5484084a34. from slave5-hbase.sii.cn,60020,1320980409810 11/11/17 23:45:30 INFO catalog.MetaEditor: Deleted daughter reference pageDB,4a7ef985,1321520697601.aa5828bfb105e1109aa676e5361b1793., qualifier=splitA, from parent pageDB,4a7ef985,1320941062356.* b2fb55650a67b28b791be4d6f813de8a*. 11/11/18 00:10:30 INFO catalog.MetaEditor: Deleted daughter reference pageDB,4a9fd9f59468cba2e7d210f41811e349,1321520697601.b0b4e65db3251fc48dc70c5484084a34., qualifier=splitB, from parent pageDB,4a7ef985,1320941062356.* b2fb55650a67b28b791be4d6f813de8a*.
