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From aaron morton <aa...@thelastpickle.com>
Subject Re: Unbalanced ring in Cassandra 0.8.4
Date Mon, 18 Jun 2012 03:58:53 GMT
Assuming you have been running repair, it' can't hurt. 

Cheers

-----------------
Aaron Morton
Freelance Developer
@aaronmorton
http://www.thelastpickle.com

On 17/06/2012, at 4:06 AM, Raj N wrote:

> Nick, do you think I should still run cleanup on the first node.
> 
> -Rajesh
> 
> On Fri, Jun 15, 2012 at 3:47 PM, Raj N <raj.cassandra@gmail.com> wrote:
> I did run nodetool move. But that was when I was setting up the cluster which means I
didn't have any data at that time.
> 
> -Raj
> 
> 
> On Fri, Jun 15, 2012 at 1:29 PM, Nick Bailey <nick@datastax.com> wrote:
> Did you start all your nodes at the correct tokens or did you balance
> by moving them? Moving nodes around won't delete unneeded data after
> the move is done.
> 
> Try running 'nodetool cleanup' on all of your nodes.
> 
> On Fri, Jun 15, 2012 at 12:24 PM, Raj N <raj.cassandra@gmail.com> wrote:
> > Actually I am not worried about the percentage. Its the data I am concerned
> > about. Look at the first node. It has 102.07GB data. And the other nodes
> > have around 60 GB(one has 69, but lets ignore that one). I am not
> > understanding why the first node has almost double the data.
> >
> > Thanks
> > -Raj
> >
> >
> > On Fri, Jun 15, 2012 at 11:06 AM, Nick Bailey <nick@datastax.com> wrote:
> >>
> >> This is just a known problem with the nodetool output and multiple
> >> DCs. Your configuration is correct. The problem with nodetool is fixed
> >> in 1.1.1
> >>
> >> https://issues.apache.org/jira/browse/CASSANDRA-3412
> >>
> >> On Fri, Jun 15, 2012 at 9:59 AM, Raj N <raj.cassandra@gmail.com> wrote:
> >> > Hi experts,
> >> >     I have a 6 node cluster across 2 DCs(DC1:3, DC2:3). I have assigned
> >> > tokens using the first strategy(adding 1) mentioned here -
> >> >
> >> > http://wiki.apache.org/cassandra/Operations?#Token_selection
> >> >
> >> > But when I run nodetool ring on my cluster, this is the result I get -
> >> >
> >> > Address         DC  Rack  Status State   Load        Owns    Token
> >> >
> >> >  113427455640312814857969558651062452225
> >> > 172.17.72.91    DC1 RAC13 Up     Normal  102.07 GB   33.33%  0
> >> > 45.10.80.144    DC2 RAC5  Up     Normal  59.1 GB     0.00%   1
> >> > 172.17.72.93    DC1 RAC18 Up     Normal  59.57 GB    33.33%
> >> >  56713727820156407428984779325531226112
> >> > 45.10.80.146    DC2 RAC7  Up     Normal  59.64 GB    0.00%
> >> > 56713727820156407428984779325531226113
> >> > 172.17.72.95    DC1 RAC19 Up     Normal  69.58 GB    33.33%
> >> >  113427455640312814857969558651062452224
> >> > 45.10.80.148    DC2 RAC9  Up     Normal  59.31 GB    0.00%
> >> > 113427455640312814857969558651062452225
> >> >
> >> >
> >> > As you can see the first node has considerably more load than the
> >> > others(almost double) which is surprising since all these are replicas
> >> > of
> >> > each other. I am running Cassandra 0.8.4. Is there an explanation for
> >> > this
> >> > behaviour? Could https://issues.apache.org/jira/browse/CASSANDRA-2433 be
> >> > the
> >> > cause for this?
> >> >
> >> > Thanks
> >> > -Raj
> >
> >
> 
> 


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