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Posted to issues@hbase.apache.org by "Devaraj Das (JIRA)" <ji...@apache.org> on 2013/05/03 09:34:16 UTC

[jira] [Updated] (HBASE-7932) Do the necessary plumbing for the region locations in META table and send the info to the RegionServers

     [ https://issues.apache.org/jira/browse/HBASE-7932?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Devaraj Das updated HBASE-7932:
-------------------------------

    Attachment: 7932-simple-2.patch

This is a much simplified approach (I think). I think this is a less intrusive approach as well. At a high level, the FavoredNodeLoadBalancer (new class introduced) does the necessary selection of the Primary, Secondary and Tertiary RSs, and updates the META table with that information (this is done in the roundRobinAssignment method called by the AssignmentManager). The RegionServers in question then read the META table and figures out the three favored nodes for their regions (in HBASE-7942, I'll implement the FileSystem operations to take into account these favored nodes). That's it. I will need to implement the others methods in FavoredNodeLoadBalancer but I haven't done that yet. Want to get a consensus on the approach. I have to cleanup the patch (and maybe move some functionality from the new balancer class to a helper class or something, but the crux of the patch is there).
                
> Do the necessary plumbing for the region locations in META table and send the info to the RegionServers
> -------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-7932
>                 URL: https://issues.apache.org/jira/browse/HBASE-7932
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Devaraj Das
>            Assignee: Devaraj Das
>            Priority: Critical
>             Fix For: 0.95.1
>
>         Attachments: 7932-1.patch, 7932-3.patch, 7932-8.1.patch, 7932-8.patch, 7932-simple-2.patch, 7932-wip-2.patch, 7932-wip-3.patch, 7932-wip-4.patch, 7932-wip.patch
>
>


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