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Date: Sat, 12 Jan 2013 19:46:13 +0000 (UTC)
From: "Jonathan Hsieh (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
Message-ID: <JIRA.12626253.1357494047993.125885.1358019973303@arcas>
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Subject: [jira] [Commented] (HBASE-7501) Introduce MetaEditor method that
 both adds and deletes rows in .META. table
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    [ https://issues.apache.org/jira/browse/HBASE-7501?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13552021#comment-13552021 ] 

Jonathan Hsieh commented on HBASE-7501:
---------------------------------------

Restore == place the current content of a table with snapshot contents.  Ideally this is an atomic transaction on meta so failure recovery doesn't have to rely on hbck.  Split could benefit from this as well.  
                
> Introduce MetaEditor method that both adds and deletes rows in .META. table
> ---------------------------------------------------------------------------
>
>                 Key: HBASE-7501
>                 URL: https://issues.apache.org/jira/browse/HBASE-7501
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Ted Yu
>            Assignee: Matteo Bertozzi
>         Attachments: HBASE-7501-v0.patch, HBASE-7501-v1.patch
>
>
> In review of HBASE-7365, MetaEditor.deleteRegions() and MetaEditor.addRegionsToMeta() are used in RestoreSnapshotHandler.java.handleTableOperation() to apply changes to .META.
> I made following suggestion:
> Can we introduce new method in MetaEditor which takes List of Mutation's ?
> The Delete and Put would be grouped and then written to .META. table in one transaction.
> Jon responded:
> I like that idea -- then the todo/warning or follow on could refer to that method.  When we fix it, it could get used in other multi row meta modifications like splits and table creation/deletion in general.
> See https://reviews.apache.org/r/8674/

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