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From "ramkrishna.s.vasudevan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-14921) Memory optimizations
Date Tue, 19 Jul 2016 05:22:20 GMT

    [ https://issues.apache.org/jira/browse/HBASE-14921?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15383595#comment-15383595
] 

ramkrishna.s.vasudevan commented on HBASE-14921:
------------------------------------------------

bq.but I suggest first to proof this scan is causing the performance degradation. Any thoughts
about that?
The point is just for the default case. In default cases we are sure that we don't need to
remove any duplicates. In such a doing a compaction is not needed. Yes for flattening we need
to do a scan but that should be like an iterator mode not with the ScanQueryMatcher. 

> Memory optimizations
> --------------------
>
>                 Key: HBASE-14921
>                 URL: https://issues.apache.org/jira/browse/HBASE-14921
>             Project: HBase
>          Issue Type: Sub-task
>    Affects Versions: 2.0.0
>            Reporter: Eshcar Hillel
>            Assignee: Anastasia Braginsky
>         Attachments: CellBlocksSegmentInMemStore.pdf, CellBlocksSegmentinthecontextofMemStore(1).pdf,
HBASE-14921-V01.patch, HBASE-14921-V02.patch, HBASE-14921-V03.patch, HBASE-14921-V04-CA-V02.patch,
HBASE-14921-V04-CA.patch, HBASE-14921-V05-CAO.patch, InitialCellArrayMapEvaluation.pdf, IntroductiontoNewFlatandCompactMemStore.pdf
>
>
> Memory optimizations including compressed format representation and offheap allocations



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