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Date: Wed, 18 Mar 2009 21:37:50 -0700 (PDT)
From: "Erik Holstad (JIRA)" <jira@apache.org>
To: hbase-dev@hadoop.apache.org
Subject: [jira] Commented: (HBASE-1249) Rearchitecting of server, client,
 API, key format, etc for 0.20
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    [ https://issues.apache.org/jira/browse/HBASE-1249?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12683316#action_12683316 ] 

Erik Holstad commented on HBASE-1249:
-------------------------------------

The pdfs looks really good and they make sense to me, just hope that they can help others to understand what we are going for here.
Just a couple of things that are a little bit unclear to me in the examples:
DeleteFamily in MemCache, should probably have a different ts, to belong there, same thing with stuff in the storefiles.

For the GetColumns(RowA, Fam, [ColA, ColB], ts(20, 0)), I would think that that query would mean give me 1 version of 
ColA and ColB from the timeperiod 20 - 0.

And for GetFamily(RowA, Fam, num=1), Couldn't you early out as soon as you encounter the DeleteFamily in MemCache?

> Rearchitecting of server, client, API, key format, etc for 0.20
> ---------------------------------------------------------------
>
>                 Key: HBASE-1249
>                 URL: https://issues.apache.org/jira/browse/HBASE-1249
>             Project: Hadoop HBase
>          Issue Type: Improvement
>            Reporter: Jonathan Gray
>            Priority: Blocker
>             Fix For: 0.20.0
>
>         Attachments: HBASE-1249-Example-v1.pdf, HBASE-1249-GetQuery-v1.pdf, HBASE-1249-GetQuery-v2.pdf, HBASE-1249-StoreFile-v1.pdf
>
>
> To discuss all the new and potential issues coming out of the change in key format (HBASE-1234): zero-copy reads, client binary protocol, update of API (HBASE-880), server optimizations, etc...

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