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From "ramkrishna.s.vasudevan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-7897) Add support for tags to Cell Interface
Date Thu, 14 Mar 2013 16:30:13 GMT

    [ https://issues.apache.org/jira/browse/HBASE-7897?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13602398#comment-13602398
] 

ramkrishna.s.vasudevan commented on HBASE-7897:
-----------------------------------------------

I posted the comment in HBASE-7233.
Pasting the comment on this JIRA as this one is active
bq.Tags are a little different than our current fields because there are multiple per Cell
The above comment is from Matt.
So basically we say we will have multiple tags for a Cell. 
Which means cell which internally is now a represenation of a KV will have more than one additional
attributes added to it (which is Tags) and one among them will be an ACL tag, visibility tag
etc.
So now how will we say which tag to see if i want to know only the Visibility part of the
Cell? 
I could see an tagIterator() api added that iterates thro the tags, so is it like every time
iterate to find out which is my Visisbility tag.
Will there be a mechanism which says visibility tag should be the first tag or second .something
like that?
                
> Add support for tags to Cell Interface
> --------------------------------------
>
>                 Key: HBASE-7897
>                 URL: https://issues.apache.org/jira/browse/HBASE-7897
>             Project: HBase
>          Issue Type: Task
>            Reporter: stack
>            Assignee: stack
>            Priority: Critical
>             Fix For: 0.95.0
>
>
> Cell Interface has suppport for mvcc.   The only thing we'd add to Cell in the near future
is support for tags it would seem.  Should be easy to add.  Should add it now.  See backing
discussion here: https://issues.apache.org/jira/browse/HBASE-7233?focusedCommentId=13573784&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13573784
> Matt outlines what the additions to Cell might look like here:
> https://issues.apache.org/jira/browse/HBASE-7233?focusedCommentId=13531619&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13531619
> Would be good to get these in now.
> Marking as 0.96.  Can more later.

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