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From Tom Chen <...@gogii.net>
Subject Re: write performance thrift interfaces
Date Thu, 18 Mar 2010 18:18:47 GMT
Hi Martin,

Are you using a connection pool? I have been able to get about a 1000+
inserts with java code on one cassandra node with small values(100 bytes).

Tom


On Thu, Mar 18, 2010 at 11:08 AM, Roger Schildmeijer <schildmeijer@gmail.com
> wrote:

> Yes, 30 writes / s sounds a little bit poor.
>
> Maybe you could show your benchmark code? And what adjustments had to be
> done to the CF?
>
> // Roger
>
>
> On 18 mar 2010, at 19.03em, Martin Probst (RobHost Support) wrote:
>
> > Hi,
> >
> > we've tested the write performance on a single and dual node cluster and
> the results are strangely poor. We've got about 30 inserts per second which
> seems a little bit slow?! The strange about is, that the node's we've used
> (single-cpu, 3gb ram, single disk) got a load of 0.02-0.05 while the inserts
> run. There is no disk/network bottlenecks, no swapping. The insert-script
> reads some values from stdin and inserts this values into cassandra. So it
> seems thats the used thrift interface are the bootleneck (we've tested php,
> perl, java, results a nearly the same). We've used version 0.5.1 and the
> default config with adjusted ColumnFamilies.
> >
> > Are there some hints or suggestions?
> >
> > Cheers,
> > Martin
>
>


-- 
Tom Chen
Software Architect
GOGII, Inc
tom@gogii.net
650-468-6318

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