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From "Nick Dimiduk (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-11331) [blockcache] lazy block decompression
Date Wed, 06 Aug 2014 23:08:12 GMT

    [ https://issues.apache.org/jira/browse/HBASE-11331?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14088436#comment-14088436
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Nick Dimiduk commented on HBASE-11331:
--------------------------------------

bq. Is there a way to autogen the JSON?

The json file I attached was exported from Grafana; I did not build it in a text editor. It's
UI starts with a black dashboard and you add to it the rows and column with metrics you want.
Probably I'm not explaining it well; I'll leave it to grafana.org/docs

> [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, lazy-decompress.02.0.pdf, lazy-decompress.02.1.json,
lazy-decompress.02.1.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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