[jira] [Comment Edited] (HBASE-16417) In-Memory MemStore Policy for Flattening and Compactions

[Anoop Sam John (JIRA)]

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https://issues.apache.org/jira/browse/HBASE-16417?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16196813#comment-16196813
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Anoop Sam John edited comment on HBASE-16417 at 10/9/17 11:07 AM:
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bq. Flat index not only takes less space but is also more friendly for memory 
management which is an advantage.
This is the point u say in the doc "Not ​ ​only ​ ​is ​ ​it ​ ​bigger ​ ​in ​ 
​size ​ ​compared ​ ​to ​ ​a ​ ​flat ​ ​index, ​ ​it ​ ​is ​ ​also ​ 
​fragmented ​ ​whereas ​ ​a ​ ​static ​ ​index
is ​ ​stored ​ ​in ​ ​a ​ ​consecutive ​ ​block ​ ​of ​ ​memory. ​ ​Therefore, 
​ ​flat ​ ​storage ​ ​incurs ​ ​smaller ​ ​overhead ​ ​in
terms ​ ​of ​ ​allocation, ​ ​GC, ​ ​".  (?)
So ur tests are with MSLAB feature turned OFF right?  Some time back in a jira 
it was mentioned so.   So here u speak abt the entry objects to CSLM vs the 
consecutive ref objects in the CellArray?
Am asking wrt the tests with NO adaptive policy. The ones for the param tuning


was (Author: anoop.hbase):
bq. Flat index not only takes less space but is also more friendly for memory 
management which is an advantage.
This is the point u say in the doc "Not ​ ​only ​ ​is ​ ​it ​ ​bigger ​ ​in ​ 
​size ​ ​compared ​ ​to ​ ​a ​ ​flat ​ ​index, ​ ​it ​ ​is ​ ​also ​ 
​fragmented ​ ​whereas ​ ​a ​ ​static ​ ​index
is ​ ​stored ​ ​in ​ ​a ​ ​consecutive ​ ​block ​ ​of ​ ​memory. ​ ​Therefore, 
​ ​flat ​ ​storage ​ ​incurs ​ ​smaller ​ ​overhead ​ ​in
terms ​ ​of ​ ​allocation, ​ ​GC, ​ ​".  (?)
So ur tests are with MSLAB feature turned OFF right?  Some time back in a jira 
it was mentioned so.   So here u speak abt the entry objects to CSLM vs the 
consecutive ref objects in the CellArray?

> In-Memory MemStore Policy for Flattening and Compactions
> --------------------------------------------------------
>
>                 Key: HBASE-16417
>                 URL: https://issues.apache.org/jira/browse/HBASE-16417
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Anastasia Braginsky
>            Assignee: Eshcar Hillel
>             Fix For: 3.0.0
>
>         Attachments: HBASE-16417 - Adaptive Compaction Policy - 20171001.pdf, 
> HBASE-16417 - parameter tuning - 20171001.pdf, HBASE-16417-V01.patch, 
> HBASE-16417-benchmarkresults-20161101.pdf, 
> HBASE-16417-benchmarkresults-20161110.pdf, 
> HBASE-16417-benchmarkresults-20161123.pdf, 
> HBASE-16417-benchmarkresults-20161205.pdf, 
> HBASE-16417-benchmarkresults-20170309.pdf, 
> HBASE-16417-benchmarkresults-20170317.pdf, HBASE-16417.01.patch, 
> HBASE-16417.02.patch, HBASE-16417.03.patch
>
>




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