[jira] [Commented] (HBASE-11331) [blockcache] lazy block decompression

["Nick Dimiduk (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-11331?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14083268#comment-14083268 ] 

Nick Dimiduk commented on HBASE-11331:
--------------------------------------

Looks like the lack of compressor reuse is a known issue, somewhere between HBASE-5881, HBASE-7435, and HADOOP-9171.

> [blockcache] lazy block decompression
> -------------------------------------
>
>                 Key: HBASE-11331
>                 URL: https://issues.apache.org/jira/browse/HBASE-11331
>             Project: HBase
>          Issue Type: Improvement
>          Components: regionserver
>            Reporter: Nick Dimiduk
>            Assignee: Nick Dimiduk
>         Attachments: HBASE-11331.00.patch, HBASE-11331.01.patch, HBASE-11331.02.patch, HBASE-11331LazyBlockDecompressperfcompare.pdf
>
>
> Maintaining data in its compressed form in the block cache will greatly increase our effective blockcache size and should show a meaning improvement in cache hit rates in well designed applications. The idea here is to lazily decompress/decrypt blocks when they're consumed, rather than as soon as they're pulled off of disk.
> This is related to but less invasive than HBASE-8894.



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