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Posted to common-dev@hadoop.apache.org by "stack (JIRA)" <ji...@apache.org> on 2008/01/05 21:47:34 UTC

[jira] Assigned: (HADOOP-2532) Add to MapFile a getClosest that returns key that comes just-before if key not present (Currently does just-after only).

     [ https://issues.apache.org/jira/browse/HADOOP-2532?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

stack reassigned HADOOP-2532:
-----------------------------

    Assignee: stack

> Add to MapFile a getClosest that returns key that comes just-before if key not present (Currently does just-after only).
> ------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-2532
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2532
>             Project: Hadoop
>          Issue Type: New Feature
>            Reporter: stack
>            Assignee: stack
>            Priority: Minor
>             Fix For: 0.16.0
>
>         Attachments: getclosestbefore-v2.patch, getclosestbefore-v3.patch, getclosestbefore.patch
>
>
> The list of regions that make up a table in hbase are effectively kept in a mapfile.  Regions are identified by the first row contained by that region.   To find the region that contains a particular row, we need to be able to search the mapfile of regions to find the closest matching row that falls just-before the searched-for key rather than the just-after that is current mapfile getClosest behavior.

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