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From "Enis Soztutar (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-11568) Async WAL replication for region replicas
Date Tue, 22 Jul 2014 22:40:40 GMT
Enis Soztutar created HBASE-11568:
-------------------------------------

             Summary: Async WAL replication for region replicas
                 Key: HBASE-11568
                 URL: https://issues.apache.org/jira/browse/HBASE-11568
             Project: HBase
          Issue Type: Sub-task
            Reporter: Enis Soztutar
            Assignee: Enis Soztutar
             Fix For: 2.0.0


As mentioned in parent issue, and design docs for phase-1 (HBASE-10070) and Phase-2 (HBASE-11183),
implement asynchronous WAL replication from the WAL files of the primary region to the secondary
region replicas. 

The WAL replication will build upon the pluggable replication framework introduced in HBASE-11367,
and the distributed WAL replay. 

Upon having some experience with the patch, we changed the design so that there is only one
replication queue for doing the async wal replication to secondary replicas rather than having
a queue per region replica. This is due to the fact that, we do not want to tail the logs
of every region server for a single region replica. 

Handling of flushes/compactions and memstore accounting will be handled in other subtasks.




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