[jira] [Commented] (HBASE-11729) Document HFile v3

["Anoop Sam John (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-11729?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14095609#comment-14095609 ] 

Anoop Sam John commented on HBASE-11729:
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There is min change from V2 to V3. There is no layout change or so. Along with every KV, the tags part will come extra.
HFile V2 -  KeyLength  ValueLength  Key  Value
HFile V3 -  KeyLength  ValueLength  Key  Value  TagsLength  Tags
Even if there are no tags, a 0 tags length will have to be written.
Tags length will be stored with 2 bytes.

+1 for documenting.


> Document HFile v3
> -----------------
>
>                 Key: HBASE-11729
>                 URL: https://issues.apache.org/jira/browse/HBASE-11729
>             Project: HBase
>          Issue Type: Task
>          Components: documentation, HFile
>    Affects Versions: 0.98.0
>            Reporter: Sean Busbey
>
> 0.98 added HFile v3. There are a couple of mentions of it in the book on the sections on cell tags, but there isn't an actual overview or design explanation like there is for [HFile v2|http://hbase.apache.org/book/hfilev2.html].



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