cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Jonathan Ellis <jbel...@gmail.com>
Subject Re: load balancing
Date Thu, 21 Jan 2010 03:16:32 GMT
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.
>
>
>

Mime
View raw message