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From "ramkrishna.s.vasudevan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-14921) Memory optimizations
Date Thu, 21 Jul 2016 10:40:21 GMT

    [ https://issues.apache.org/jira/browse/HBASE-14921?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15387509#comment-15387509
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ramkrishna.s.vasudevan commented on HBASE-14921:
------------------------------------------------

bq.We can do it when we have like e.g. 10 segments in the pipeline. If we are going to simply
flush it all to disk we are going to create many small files and their compaction is going
to run on disk then...
[~anastas] - The idea was to flush all the segments into one file. So the snapshot will contain
10 segments and all the 10 will be flushed at one shot. Not that we will create 10 files -
1 out of each segment.
I am just reviewing this code. If the patch is not updated in RB can you update it? 

> 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, HBASE-14921-V06-CAO.patch, InitialCellArrayMapEvaluation.pdf,
IntroductiontoNewFlatandCompactMemStore.pdf
>
>
> Memory optimizations including compressed format representation and offheap allocations



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