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From "Anoop Sam John (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-15554) StoreFile$Writer.appendGeneralBloomFilter generates extra KV
Date Tue, 29 Mar 2016 05:14:25 GMT

    [ https://issues.apache.org/jira/browse/HBASE-15554?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15215441#comment-15215441

Anoop Sam John commented on HBASE-15554:

You mean this one
bloomKeyKV = KeyValueUtil.createFirstOnRow(cell.getRowArray(), cell.getRowOffset(),
                HConstants.EMPTY_BYTE_ARRAY, 0, 0, cell.getQualifierArray(),
We need to create a new byte[] with rk and Q alone and that is needed..    Can avoid the create
of KV object every time.. But there is a check for increasing KV compared to previous written
cell..   Can we avoid this check altogether now?  If so, we can make some change in the bloom
write f/w so as to pass a Cell directly and the writer decides what all part of that cell
to be considered for the bloom write. (?)

> StoreFile$Writer.appendGeneralBloomFilter generates extra KV
> ------------------------------------------------------------
>                 Key: HBASE-15554
>                 URL: https://issues.apache.org/jira/browse/HBASE-15554
>             Project: HBase
>          Issue Type: Sub-task
>          Components: Performance
>            Reporter: Vladimir Rodionov
>            Assignee: Vladimir Rodionov
>             Fix For: 2.0.0
> Accounts for 10% memory allocation when BloomFilterType is ROWCOL.

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