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Posted to notifications@accumulo.apache.org by "Eric Newton (JIRA)" <ji...@apache.org> on 2014/10/03 22:41:34 UTC

[jira] [Updated] (ACCUMULO-3193) bulkImport file rename is a bottleneck

     [ https://issues.apache.org/jira/browse/ACCUMULO-3193?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Eric Newton updated ACCUMULO-3193:
----------------------------------
    Issue Type: Improvement  (was: Bug)

> bulkImport file rename is a bottleneck
> --------------------------------------
>
>                 Key: ACCUMULO-3193
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-3193
>             Project: Accumulo
>          Issue Type: Improvement
>          Components: master
>    Affects Versions: 1.5.0, 1.5.1, 1.5.2, 1.6.0, 1.6.1
>         Environment: very large cluster
>            Reporter: Eric Newton
>            Assignee: Eric Newton
>             Fix For: 1.7.0
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> On a very large cluster, importing a few thousand files takes several minutes.  Most of that time is spent renaming the user's files into the accumulo bulk-load directory.  In this case, the master is competing against the other demands on the NN.  The master could adopt the same strategy as the file GC, and run the renames in parallel, to push more operations into the NN at one time.



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