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From GitBox <...@apache.org>
Subject [GitHub] [ambari] ivan-martynov-dell opened a new pull request #3195: OneFS mpack fix for performance (new version 1.0.3)
Date Mon, 18 May 2020 12:38:39 GMT

ivan-martynov-dell opened a new pull request #3195:
URL: https://github.com/apache/ambari/pull/3195


   ## What changes were proposed in this pull request?
   
   (see. https://issues.apache.org/jira/browse/AMBARI-25505)
   The problem is that a feature of HBase 2 AsyncFSWAL causes worse performance with OneFS.
We need to disable this in the OneFS Ambari management pack by setting the property name:
"hbase.wal.provider" with value: "filesystem" for HBASE. The way to change the property has
been already introduced at:
   https://jira.apache.org/jira/browse/HBASE-15536
    We are going to issue a new version of isilon-onefs-mpack (1.0.3) where we will have some
code lines which add this property to HBASE settings. Change of property is applied automatically
after installation of HBASE service and installing a new version of mpack.
   
   Business Justification: The problem we are working on is that a new feature of HBase 2
(AsyncFSWAL) causes worse performance with OneFS.
   Some Isilon customers which use HBASE with Ambari with OneFS suffer from this problem.
The fix should help these customers.
   
   ## How was this patch tested?
   
   Performed unit testing and manual testing for 4 main use cases. 
   As they are textually long, please look at:  https://jira.apache.org/jira/browse/HBASE-15536
   for detailed explanations.
   


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