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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-13807) [0.98] NoTagsKeyValue optimization is not proper
Date Sat, 30 May 2015 11:31:17 GMT

    [ https://issues.apache.org/jira/browse/HBASE-13807?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14565952#comment-14565952
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Hudson commented on HBASE-13807:
--------------------------------

FAILURE: Integrated in HBase-0.98-on-Hadoop-1.1 #964 (See [https://builds.apache.org/job/HBase-0.98-on-Hadoop-1.1/964/])
HBASE-13807 [0.98] NoTagsKeyValue optimization is not proper. (anoopsamjohn: rev 919c4a4522e3a6536d9f32b4b0149d9e57794c4c)
* hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileReaderV3.java
* hbase-common/src/main/java/org/apache/hadoop/hbase/io/encoding/BufferedDataBlockEncoder.java
* hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileReaderV2.java


> [0.98] NoTagsKeyValue optimization is not proper
> ------------------------------------------------
>
>                 Key: HBASE-13807
>                 URL: https://issues.apache.org/jira/browse/HBASE-13807
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.98.13
>            Reporter: Anoop Sam John
>            Assignee: Anoop Sam John
>             Fix For: 0.98.13
>
>         Attachments: HBASE-13807-0.98.patch
>
>
> When the file format is V2, it has no support for tags and so cells will be with 0 tags
length. For such cells we make NoTagsKeyValue which avoid getTagsLength parsing overhead in
KeyValue. Still HFileReaderV2 creates KeyValue.
> This is a 0.98 issue only.
> Also in case of DBE, we can consider the tags length and return KeyValue/NoTagsKeyValue



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