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From "Zach York (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-17204) Make Off heap Bucket Cache default ON
Date Mon, 11 Dec 2017 22:03:00 GMT

    [ https://issues.apache.org/jira/browse/HBASE-17204?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16286647#comment-16286647
] 

Zach York commented on HBASE-17204:
-----------------------------------

[~stack] Thanks for the clarification. That sounds good. No other major concerns.

I'll help review the remaining tasks :)

> Make Off heap Bucket Cache default ON
> -------------------------------------
>
>                 Key: HBASE-17204
>                 URL: https://issues.apache.org/jira/browse/HBASE-17204
>             Project: HBase
>          Issue Type: Improvement
>    Affects Versions: 2.0.0
>            Reporter: Anoop Sam John
>            Assignee: Anoop Sam John
>            Priority: Blocker
>             Fix For: 2.0.0-beta-1
>
>
> L2 cache can be used for data blocks.  By default it is off now. After HBASE-11425 work,
L2 off heap cache can equally perform with L1 on heap cache. On heavy loaded workload, this
can even out perform L1 cache.  Pls see recently published report by Alibaba.  Also this work
was backported by Rocketfuel and similar perf improvement report from them too.
> Let us turn L2 off heap cache ON. As it is off heap, we can have much larger sized L2
BC.  What should be the default size?



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