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From Jonathan Ellis <jbel...@gmail.com>
Subject Re: balancing issue with Random partitioner
Date Mon, 12 Sep 2011 21:22:23 GMT
Looks kind of like the 4th node was added to the cluster w/o bootstrapping.

On Mon, Sep 12, 2011 at 3:59 PM, David McNelis
<dmcnelis@agentisenergy.com> wrote:
> We are running the datastax .8 rpm distro.  We have a situation where we
> have 4 nodes and each owns 25% of the keys.  However the last node in the
> ring does not seem to be  getting much of a load at all.
> We are using the random partitioner, we have a total of about 20k keys that
> are sequential...
> Our nodetool ring  output is currently:
> Address         DC          Rack        Status State   Load        
   Owns
>    Token
>
>    127605887595351923798765477786913079296
> 10.181.138.167  datacenter1 rack1       Up     Normal  99.37 GB
>  25.00%  0
> 192.168.100.6   datacenter1 rack1       Up     Normal  106.25 GB
> 25.00%  42535295865117307932921825928971026432
> 10.181.137.37   datacenter1 rack1       Up     Normal  77.7 GB
> 25.00%  85070591730234615865843651857942052863
> 192.168.100.5   datacenter1 rack1       Up     Normal  494.67 KB
> 25.00%  127605887595351923798765477786913079296
>
> Nothing is running on netstats on .37 or .5.
> I understand that the nature of the beast would cause the load to differ
> between the nodes...but I wouldn't expect it to be so drastic.  We had the
> token for .37 set to 85070591730234615865843651857942052864, and I
> decremented and moved it to try to kickstart some streaming on the thought
> that something may have failed, but that didn't yield any appreciable
> results.
> Are we seeing completely abnormal behavior?  Should I consider making the
> token for the fourth node considerably smaller?  We calculated the node's
> tokens using the standard python script.
> --
> David McNelis
> Lead Software Engineer
> Agentis Energy
> www.agentisenergy.com
> o: 630.359.6395
> c: 219.384.5143
> A Smart Grid technology company focused on helping consumers of energy
> control an often under-managed resource.
>
>



-- 
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com

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