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From "Walter Koetke (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-15480) Bloom Filter check needs to be more efficient for array
Date Thu, 31 Mar 2016 15:02:25 GMT

    [ https://issues.apache.org/jira/browse/HBASE-15480?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15219987#comment-15219987
] 

Walter Koetke commented on HBASE-15480:
---------------------------------------

To answer Ted's question about the performance improvement, see the attachment BloomFilterCheckOneByOne,
screenshot about how much time was going here. All of this went away for us with the change
in place.

> Bloom Filter check needs to be more efficient for array
> -------------------------------------------------------
>
>                 Key: HBASE-15480
>                 URL: https://issues.apache.org/jira/browse/HBASE-15480
>             Project: HBase
>          Issue Type: Improvement
>          Components: Performance
>    Affects Versions: 1.0.3
>            Reporter: Walter Koetke
>            Assignee: Walter Koetke
>             Fix For: 1.0.4
>
>         Attachments: BloomFilterCheckOneByOne.tiff, HBASE-15480-branch-1.0.patch
>
>
> It is currently inefficient to do lots of bloom filter checks. Each check has overhead
like going to the block cache to retrieve the block and recording metrics. It would be good
to have one bloom filter check api that does a bunch of checks without so much block retrieval
and metrics updates.



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