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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HBASE-2970) Meta blocks should be given their own priority bucket in block cache
Date Fri, 01 Oct 2010 23:38:35 GMT

     [ https://issues.apache.org/jira/browse/HBASE-2970?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

stack updated HBASE-2970:
-------------------------

    Fix Version/s:     (was: 0.90.0)

Moving out of 0.90.

> Meta blocks should be given their own priority bucket in block cache
> --------------------------------------------------------------------
>
>                 Key: HBASE-2970
>                 URL: https://issues.apache.org/jira/browse/HBASE-2970
>             Project: HBase
>          Issue Type: Improvement
>          Components: io, regionserver
>            Reporter: Jonathan Gray
>            Assignee: Jonathan Gray
>
> Bloom filters are currently using the LRU block cache.  They are being treated as normal
data blocks, however, it would be advantageous if we could treat me separately and give them
their own portion of the LRU.
> What we've seen in practice is that some blooms get very big and are accessed frequently.
 This leads to blooms consuming a majority of the cache so lots of churn on data blocks.
> In any case, I think it is desirable in general to be able to control how much memory
is used for blooms and other meta data.

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