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https://issues.apache.org/jira/browse/HBASE-14919?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15091832#comment-15091832
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Anoop Sam John commented on HBASE-14919:
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updateLowestUnflushedSequenceIdInWal () -> Tracking of this and passing some
seqId while snapshot, is this done to handle the rollback of memstore in the
new memstore impl? So after HBASE-15082, we might not need these as we are
getting away from rollback. Even when we have rollback, we could have done
that rollback by adding a delete marker for the cell if that was gone into
pipeline.
> Infrastructure refactoring
> --------------------------
>
> Key: HBASE-14919
> URL: https://issues.apache.org/jira/browse/HBASE-14919
> Project: HBase
> Issue Type: Sub-task
> Affects Versions: 2.0.0
> Reporter: Eshcar Hillel
> Assignee: Eshcar Hillel
> Attachments: HBASE-14919-V01.patch, HBASE-14919-V01.patch,
> HBASE-14919-V02.patch, HBASE-14919-V03.patch, HBASE-14919-V04.patch,
> HBASE-14919-V04.patch
>
>
> Refactoring the MemStore hierarchy, introducing segment (StoreSegment) as
> first-class citizen and decoupling memstore scanner from the memstore
> implementation.
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