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https://issues.apache.org/jira/browse/HBASE-23296?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16976452#comment-16976452
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ramkrishna.s.vasudevan commented on HBASE-23296:
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Good one [~javaman_chen]. We tried for a tiered bucket cache but that is for
the data block itself. But this is for the index blocks itself. Seems like a
good improvement.
> 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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