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Aravind Gottipati commented on HBASE-4298: ------------------------------------------ Well.. JIRA lost all my formatting in my last comment.. I hope it still makes sense. The latest changesets are https://github.com/aravind/hbase/commit/46f3b58c60f4f1c81806fdad6e606badf84fc30c for trunk. https://github.com/aravind/hbase/commit/e6cf9ecf78f8e0d6f46c2a77a524e6bccec45001 for 0.90. > Support to drain RS nodes through ZK > ------------------------------------ > > Key: HBASE-4298 > URL: https://issues.apache.org/jira/browse/HBASE-4298 > Project: HBase > Issue Type: Improvement > Components: master > Affects Versions: 0.90.4 > Environment: all > Reporter: Aravind Gottipati > Priority: Critical > Labels: patch > Fix For: 0.92.0, 0.90.5 > > > HDFS currently has a way to exclude certain datanodes and prevent them from > getting new blocks. HDFS goes one step further and even drains these nodes > for you. This enhancement is a step in that direction. > The idea is that we mark nodes in zookeeper as draining nodes. This means > that they don't get any more new regions. These draining nodes look exactly > the same as the corresponding nodes in /rs, except they live under /draining. > Eventually, support for draining them can be added. I am submitting two > patches for review - one for the 0.90 branch and one for trunk (in git). > Here are the two patches > 0.90 - > https://github.com/aravind/hbase/commit/181041e72e7ffe6a4da6d82b431ef7f8c99e62d2 > trunk - > https://github.com/aravind/hbase/commit/e127b25ae3b4034103b185d8380f3b7267bc67d5 > I have tested both these patches and they work as advertised. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira