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Posted to issues@hbase.apache.org by "chenxu (Jira)" <ji...@apache.org> on 2019/11/19 02:58:00 UTC
[jira] [Assigned] (HBASE-23296) Add CompositeBucketCache to support
tiered BC
[ https://issues.apache.org/jira/browse/HBASE-23296?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
chenxu reassigned HBASE-23296:
------------------------------
Assignee: chenxu
> Add CompositeBucketCache to support tiered BC
> ---------------------------------------------
>
> Key: HBASE-23296
> URL: https://issues.apache.org/jira/browse/HBASE-23296
> Project: HBase
> Issue Type: Improvement
> Components: BlockCache
> Reporter: chenxu
> Assignee: 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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