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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-5375) Ensure that compactions use already cached blocks but do not cache new data blocks
Date Fri, 08 Aug 2014 18:51:13 GMT

     [ https://issues.apache.org/jira/browse/HBASE-5375?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

stack updated HBASE-5375:
-------------------------

    Component/s: Performance
                 BlockCache

> Ensure that compactions use already cached blocks but do not cache new data blocks
> ----------------------------------------------------------------------------------
>
>                 Key: HBASE-5375
>                 URL: https://issues.apache.org/jira/browse/HBASE-5375
>             Project: HBase
>          Issue Type: Test
>          Components: BlockCache, Performance
>            Reporter: Mikhail Bautin
>
> Create a unit test to verify that compactions reuse existing cached blocks but do not
thrash the cache with newly read blocks. Also need to verify that we only read every data
block once, e.g. that we don't re-read the block on every next() operation. HBASE-1597 did
not seem to include a unit test, so we need to add a test now. This and HBASE-4683 (the unit
test that was not checked in) are the remaining missing pieces before we can close HBASE-3976.



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