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From aaron morton <aa...@thelastpickle.com>
Subject Re: Multiple Data Center shows very uneven load
Date Tue, 11 Dec 2012 20:10:11 GMT
I would check the logs for Dropped Message alerts, and run repair if you have not. 

I would also look at the nodetool CF stats on each node to check the row size. It may be the
case that you have some very wide rows stored on nodes 10.56.92.196, 10.28.91.8, 10.56.92.198
and 10.28.91.2 

Hope that helps. 


-----------------
Aaron Morton
Freelance Cassandra Developer
New Zealand

@aaronmorton
http://www.thelastpickle.com

On 11/12/2012, at 4:29 PM, Keith Wright <kwright@nanigans.com> wrote:

> Hello,
> 
> I have base Cassandra 1.1.7 installed in two data centers with 3 nodes each using a PropertyFileSnitch
as outlined below. When I run a nodetool ring, I see a very uneven load. Any idea what I could
be going on? I have not added/removed any nodes or changed the replication scheme or counts.
> 
> Thanks!
> 
> Address DC Rack Status State Load Effective-Ownership Token
> 113427455640312821154458202477256070485
> 10.56.92.194 WDC RAC1 Up Normal 53.65 GB 66.67% 0
> 10.28.91.10 SEA RC1 Up Normal 3.96 GB 66.67% 1
> 10.56.92.196 WDC RAC1 Up Normal 673.78 MB 66.67% 56713727820156410577229101238628035242
> 10.28.91.8 SEA RC1 Up Normal 670 MB 66.67% 56713727820156410577229101238628035243
> 10.56.92.198 WDC RAC1 Up Normal 746.25 MB 66.67% 113427455640312821154458202477256070484
> 10.28.91.2 SEA RC1 Up Normal 799.51 MB 66.67% 113427455640312821154458202477256070485
> 
> Replication Strategy: org.apache.cassandra.locator.NetworkTopologyStrategy
> Durable Writes: true
> Options: [WDC:2, SEA:2]
> 
> Cluster Information:
> Snitch: org.apache.cassandra.locator.PropertyFileSnitch
> Partitioner: org.apache.cassandra.dht.RandomPartitioner
> 
> ##### WDC
> 10.56.92.194=WDC:RAC1
> 10.56.92.196=WDC:RAC1
> 10.56.92.198=WDC:RAC1
> 
> #### SEATTLE
> 10.28.91.10=SEA:RC1
> 10.28.91.8=SEA:RC1
> 10.28.91.2=SEA:RC1
> 
> # default for unknown nodes
> default=DALLAS:RAC1
> 
> 


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