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From "Anoop Sam John (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-16421) Introducing the CellChunkMap as a new additional index variant in the MemStore
Date Mon, 19 Dec 2016 06:15:58 GMT

    [ https://issues.apache.org/jira/browse/HBASE-16421?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15760286#comment-15760286
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Anoop Sam John commented on HBASE-16421:
----------------------------------------

We should also do
1. A way to flush (to disk) chunk mapped segment directly with NO need to again make on heap
Cell objects..  This is going to a big change I guess. The entire flush path work based on
a scanner and that path need Cells.  
2. Same way as above for the in memory compaction of 1+ chunk mapped segments.

We may need to do some PoC around all these and see the perf benefit/impact before working
on individual patches..  Still there are some doubts on the scan perf parts.  So as early
PoC test is a must IMHO.

> Introducing the CellChunkMap as a new additional index variant in the MemStore
> ------------------------------------------------------------------------------
>
>                 Key: HBASE-16421
>                 URL: https://issues.apache.org/jira/browse/HBASE-16421
>             Project: HBase
>          Issue Type: Umbrella
>            Reporter: Anastasia Braginsky
>         Attachments: CellChunkMapRevived.pdf, IntroductiontoNewFlatandCompactMemStore.pdf
>
>
> Follow up for HBASE-14921. This is going to be the umbrella JIRA to include all the parts
of integration of the CellChunkMap to the MemStore.



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