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Posted to notifications@accumulo.apache.org by "Eric Newton (JIRA)" <ji...@apache.org> on 2014/10/27 15:50:33 UTC

[jira] [Created] (ACCUMULO-3263) re-write tablet directories to fairly use multiple name-nodes

Eric Newton created ACCUMULO-3263:
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             Summary: re-write tablet directories to fairly use multiple name-nodes
                 Key: ACCUMULO-3263
                 URL: https://issues.apache.org/jira/browse/ACCUMULO-3263
             Project: Accumulo
          Issue Type: Improvement
          Components: client
    Affects Versions: 1.6.1, 1.6.0
            Reporter: Eric Newton
            Assignee: Eric Newton
             Fix For: 1.7.0


When upgrading a very large cluster from 1.5 to 1.6, users can add new NNs for additional scaling.  Unfortunately, all the current tablet directories will be on the original NN. Of course, over time, new directories will begin using the new NNs, but for a large cluster, this may never result in fair NN use.

Create a utility that will re-write offline tablet directory entries so that future files will be re-written using all NNs in a fair way.



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