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https://issues.apache.org/jira/browse/HBASE-13807?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Anoop Sam John updated HBASE-13807:
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Attachment: HBASE-13807-0.98.patch
FYI [~apurtell]
> [0.98] NoTagsKeyValue optimization is not proper
> ------------------------------------------------
>
> Key: HBASE-13807
> URL: https://issues.apache.org/jira/browse/HBASE-13807
> Project: HBase
> Issue Type: Bug
> Reporter: Anoop Sam John
> Assignee: Anoop Sam John
> Fix For: 0.98.14
>
> 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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