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Posted to issues@hbase.apache.org by "chenxu (Jira)" <ji...@apache.org> on 2019/11/15 03:34:00 UTC

[jira] [Commented] (HBASE-23296) Support Bucket based L1 Cache

    [ https://issues.apache.org/jira/browse/HBASE-23296?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16974760#comment-16974760 ] 

chenxu commented on HBASE-23296:
--------------------------------

FYI [~anoop.hbase], [~ramkrishna], [~openinx]

> Support Bucket based L1 Cache
> -----------------------------
>
>                 Key: HBASE-23296
>                 URL: https://issues.apache.org/jira/browse/HBASE-23296
>             Project: HBase
>          Issue Type: Improvement
>          Components: BlockCache
>            Reporter: chenxu
>            Priority: Major
>
> LruBlockCache is not suitable in the following scenarios:
> (1) cache size too large (will take too much heap memory, and evictBlocksByHfileName is not so efficient, as HBASE-23277 mentioned)
> (2) block evicted frequently, especially cacheOnWrite & prefetchOnOpen are enabled.
> Since block‘s data is reclaimed by GC, this may affect GC performance.
> So how about enabling a Bucket based L1 Cache.



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