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Posted to issues@hbase.apache.org by "Vladimir Rodionov (JIRA)" <ji...@apache.org> on 2014/09/10 23:24:33 UTC

[jira] [Commented] (HBASE-11936) IsolationLevel must be attribute of a Query not a Scan

    [ https://issues.apache.org/jira/browse/HBASE-11936?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14129137#comment-14129137 ] 

Vladimir Rodionov commented on HBASE-11936:
-------------------------------------------

READ_UNCOMMITTED should be much cheaper and efficient than it is now (in a future). For Get operation to take advantage of a new and upcoming changes in Scanner machinery we need to control isolation level in a Get itself.

> IsolationLevel must be attribute of a Query not a Scan
> ------------------------------------------------------
>
>                 Key: HBASE-11936
>                 URL: https://issues.apache.org/jira/browse/HBASE-11936
>             Project: HBase
>          Issue Type: Bug
>          Components: Client
>            Reporter: Vladimir Rodionov
>            Assignee: Vladimir Rodionov
>
> The Get operation is implemented in HBase as a Scan. The default isolation level for Scan is READ_COMMITTED. The API to change the isolation level is part of Scan class and there is no way for Get operation to change this from default. We should move this API up to Query (which is a parent of both: Scan and Get). 



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