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From "Josh Elser (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (ACCUMULO-3471) Adding a new tserver puts some tables offline for few minutes
Date Sun, 05 Apr 2015 05:20:34 GMT

     [ https://issues.apache.org/jira/browse/ACCUMULO-3471?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Josh Elser updated ACCUMULO-3471:
---------------------------------
    Fix Version/s:     (was: 1.7.0)
                   1.7.1
                   1.8.0

> Adding a new tserver puts some tables offline for few minutes
> -------------------------------------------------------------
>
>                 Key: ACCUMULO-3471
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-3471
>             Project: Accumulo
>          Issue Type: Bug
>          Components: tserver
>    Affects Versions: 1.6.1
>         Environment: Ubuntu 12.04
>            Reporter: Denis Petrov
>             Fix For: 1.6.3, 1.8.0, 1.7.1
>
>         Attachments: ACCUMULO-3471-balance-test.patch
>
>
> I run an Accumulo cluster with 15 tservers with about 6000 tablets on each (disks are
quite slow - each node has 2*4Tb SATA)
> When a new tserver added to the cluster, the rebalancing procedure starts.
> During this procedure some tablets are offline and unreachable during 5-10 minutes.
> It is visible in http://monitor:50095/tables and by timeouts on client side.
> The rebalancing caused by killing a tserver converges much faster then rebalancing caused
by adding a tserver.



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