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From Bill Au <bill.w...@gmail.com>
Subject Re: adding replication status to dfshealth.jsp
Date Wed, 11 Feb 2009 17:16:45 GMT
Thanks for the pointer about JMX.  I will definitely look into that.

Bill

On Tue, Feb 10, 2009 at 8:51 PM, Brian Bockelman <bbockelm@cse.unl.edu>wrote:

> Hey Bill,
>
> Have you tried the Ganglia or JMX stats from your namenode?
>
> I.e., look here:
>
>
> http://rcf.unl.edu/ganglia/?m=load_one&r=hour&s=descending&c=red-workers&h=hadoop-name&sh=1&hc=4&z=small
>
> The dfs.FSNamesystem.UnderReplicatedBlocks metric should keep track of what
> you're looking for.  You can query Ganglia or turn on JMX and use one of the
> JMX/Nagios connectors.
>
> Brian
>
>
> On Feb 10, 2009, at 5:05 PM, Bill Au wrote:
>
>  I am in the process of setting up remote monitoring of my Hadoop cluster.
>>  I
>> seems to me that the replication status can only be obtained from the
>> command line by the fsck command.  Has anyone though about adding
>> replication status to the NameNode web UI in dfshealth.jsp?  Or is that
>> something that I really shouldn't worry about since Hadoop will fix things
>> all by itself?
>>
>> Bill
>>
>
>

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