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From "Jeffrey Zhong (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-12485) Maintain SeqId monotonically increasing when Region Replica is on
Date Thu, 04 Dec 2014 02:20:13 GMT

     [ https://issues.apache.org/jira/browse/HBASE-12485?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Jeffrey Zhong updated HBASE-12485:
    Attachment: HBASE-12485.patch

Submit Patch for QA run. The patch basically uses SeqId file to store region latest seqId
during region close & open. Thanks.

> Maintain SeqId monotonically increasing when Region Replica is on
> -----------------------------------------------------------------
>                 Key: HBASE-12485
>                 URL: https://issues.apache.org/jira/browse/HBASE-12485
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Jeffrey Zhong
>            Assignee: Jeffrey Zhong
>         Attachments: HBASE-12485.patch
> We added FLUSH, REGION CLOSE events into WAL, for each those events the region SeqId
is bumped. 
> The issue comes from region close operation. Because when opening a region, we use flushed
SeqId from store files while after store flush during region close we still write COMMIT_FLUSH,
REGION_CLOSE events etc which respectively bump up SeqId. Therefore, the region opening SeqId
is lower than it should be.  

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