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From "B. Todd Burruss" <bburr...@real.com>
Subject Re: load balancing
Date Thu, 21 Jan 2010 21:48:51 GMT
i do have the fix.  just checked the code.


On Wed, 2010-01-20 at 19:16 -0800, Jonathan Ellis wrote:
> are you on a recent enough trunk to have the fix for
> https://issues.apache.org/jira/browse/CASSANDRA-715 ?  We had a
> regression for a while that caused HH delivery to infinite loop
> consuming a ton of CPU, which sounds like what you're seeing.
> 
> On Wed, Jan 20, 2010 at 3:59 PM, B. Todd Burruss <bburruss@real.com> wrote:
> > feedback on trunk code ... i'm using code from trunk, 4 node cluster,
> > RF=3, W=Q, R=Q and did a nodeprobe loadbalance on the hot node.  the
> > cluster ran through the night and this morning i noticed a lot of
> > pending hinted-handoff-pool via tpstats.  looking thru the logs i notice
> > that the nodes are very frequently "InetAddress /192.168.132.102 is now
> > dead" then back UP .. flapping of the nodes.
> >
> > is this triggering the hinted-handoff and is there a way to alleviate
> > this (other than lowering the load)?  it seems that the hinted handdoffs
> > have slowed or stopped the loadbalance.
> >
> > i've been trying to load up the cluster with data, so i'm trying to do
> > 2000+ puts a second with little or no reads.  it seems like the node
> > that is loadbalancing is bringing the performance of the cluster way
> > down.
> >
> >
> >



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