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From "Sean Owen (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SPARK-6105) enhance spark-ganglia to support redundant gmond addresses setting in ganglia unicast mode
Date Tue, 03 Mar 2015 09:58:04 GMT

     [ https://issues.apache.org/jira/browse/SPARK-6105?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sean Owen updated SPARK-6105:
-----------------------------
          Component/s: Spark Core
    Affects Version/s:     (was: 1.3.0)
                       1.2.1

> enhance spark-ganglia to support redundant gmond addresses setting in ganglia unicast
mode
> ------------------------------------------------------------------------------------------
>
>                 Key: SPARK-6105
>                 URL: https://issues.apache.org/jira/browse/SPARK-6105
>             Project: Spark
>          Issue Type: Improvement
>          Components: Spark Core
>    Affects Versions: 1.2.1
>            Reporter: Fuqing Yang
>            Priority: Minor
>
> 1 why do it?
> when using spark-ganglia with ganglia unicast mode, I found it has single point of failure
in gmond setting.
> we can not set *.sink.ganglia.host to localhost but only to a designated gmond address
because gmond do not forward the metrics from spark GangliaSink. This problem can found in
ganglia maillist:
> [Ganglia-general] Gmond forward messages
> http://sourceforge.net/p/ganglia/mailman/message/30268666/
> [Ganglia-general] gmond forwarding
> http://sourceforge.net/p/ganglia/mailman/message/28290307/
> So, in ganglia unicast mode, we may missing the metrics if the designated gmond went
wrong.
> 2 how to resolve this SPOF
> add new parameter *.sink.ganglia.servers in conf/metrics.properties.
> eg:
> *.sink.ganglia.servers=host1:port1, host2:port2
> if enabled spark ganglia sink, use GangliaSink to parse *.sink.ganglia.servers to construct
redundant GangliaReporters.
> for backend compatibility, preserve the old parameters *.sink.ganglia.host, *.sink.ganglia.port,
If users do not use *.sink.ganglia.servers, give a warning, and the old parameters work.
> 3 problems introduced.
> none



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