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From "Eric Newton (JIRA)" <>
Subject [jira] [Resolved] (ACCUMULO-3999) monitor status collection should be done in parallel
Date Mon, 19 Oct 2015 14:44:05 GMT


Eric Newton resolved ACCUMULO-3999.
    Resolution: Fixed

> monitor status collection should be done in parallel
> ----------------------------------------------------
>                 Key: ACCUMULO-3999
>                 URL:
>             Project: Accumulo
>          Issue Type: Improvement
>          Components: master
>         Environment: very large cluster
>            Reporter: Eric Newton
>            Assignee: Eric Newton
>             Fix For: 1.8.0
>          Time Spent: 20m
>  Remaining Estimate: 0h
> The master collects statistics every few seconds from all the tservers so that it has
up-to-date statistics to hand to the balancer.  It does this one server at a time.  On a very
large cluster, the status collection can take a long time, causing the monitor to show "blocky"
statistics in the graphs, and long "last contact" times in the tablet server lists.
> A small thread pool could be used to speed up this simple work.

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