[jira] [Commented] (HBASE-9249) Add cp hook before setting PONR in split

["ramkrishna.s.vasudevan (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-9249?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13746042#comment-13746042 ] 

ramkrishna.s.vasudevan commented on HBASE-9249:
-----------------------------------------------

These changes are enough Rajesh.  For doing step 10 do we need to use the information from SplitInfo and add it to Meta?

                
> Add cp hook before setting PONR in split
> ----------------------------------------
>
>                 Key: HBASE-9249
>                 URL: https://issues.apache.org/jira/browse/HBASE-9249
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: rajeshbabu
>         Attachments: HBASE-9249.patch
>
>
> This hook helps to perform split on user region and corresponding index region such that both will be split or none.
> With this hook split for user and index region as follows
> user region
> ===========
> 1) Create splitting znode for user region split
> 2) Close parent user region
> 3) split user region storefiles
> 4) instantiate child regions of user region
> Through the new hook we can call index region transitions as below
> index region
> ===========
> 5) Create splitting znode for index region split
> 6) Close parent index region
> 7) Split storefiles of index region
> 8) instantiate child regions of the index region
> If any failures in 5,6,7,8 rollback the steps and return null, on null return throw exception to rollback for 1,2,3,4
> 9) set PONR
> 10) do batch put of offline and split entries for user and index regions
> user region
> ===========
> 11) open daughers of user regions and transition znode to split.
> We can open index region daughters and transition znode to split through postSplit hook which is already present.
> index region
> ============
> 12) open daughers of index regions and transition znode to split.
> Even if region server crashes also at the end both user and index regions will be split or none

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