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From "Ted Yu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-8185) Feature to enable Client Side Scanning(Client side merging) in HBase.
Date Sat, 23 Mar 2013 04:29:18 GMT

    [ https://issues.apache.org/jira/browse/HBASE-8185?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13611586#comment-13611586

Ted Yu commented on HBASE-8185:

bq. Creating a snapshot of a store using hdfs hardlinks of the store files
I wonder what consistency model you are targeting.
Would taking the snapshot involve master coordination ?
> Feature to enable Client Side Scanning(Client side merging) in HBase.
> ---------------------------------------------------------------------
>                 Key: HBASE-8185
>                 URL: https://issues.apache.org/jira/browse/HBASE-8185
>             Project: HBase
>          Issue Type: New Feature
>          Components: regionserver
>    Affects Versions: 0.89-fb
>            Reporter: Manukranth Kolloju
>             Fix For: 0.89-fb
>   Original Estimate: 168h
>  Remaining Estimate: 168h
> The motivation of this was to enable the client to be able to open the region scanner(and
in turn open StoreScanners) and perform the merge on the client side. This will lower the
cpu ops that are consumed by the RegionServer since the data is pulled directly from the datanode.
In cases where the user is interested to perform a large scan on hbase data check-pointed
at a point of time, we think that ClientSideScan(ClientSideMerge) would give a very high throughput
as compared to using the ClientScanner in HTable.

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