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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-16417) In-Memory MemStore Policy for Flattening and Compactions
Date Thu, 09 Mar 2017 19:59:38 GMT

    [ https://issues.apache.org/jira/browse/HBASE-16417?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15903755#comment-15903755

stack commented on HBASE-16417:

bq. Any chance of using larger values (e.g. 2KB) ?

Please be explicit on what you are asking for [~ted_yu] Asking for 'larger' values w/o why
or fit criteria you would see satisfied is like asking for values that are 'ethical' or values
that smell sweet.

[~eshcar]  Nice writeup. Those numbers are looking good (I like the write amplification improvements
and the less GC...). (Trying to channel [~ted_yu]), how you think the numbers would change
if 'default' 1k values were used? Would we see the same benefit do you think?

On the 90th percentile degradation when BASIC, how many segments we talking .... 2 or 3 or
more than this?  In another issue we might dig in on why the degradation... I'd think read
from Segments in parallel should be nice and prompt. Probably something dumb we are doing.
For another issue.

You thinking the numbers good enough to enable BASIC as default?  Merging means more memory
churn, more CPU expended.... would be cool if we could do w/o merge...

Nice writeup.

> 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: 2.0.0
>         Attachments: 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

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