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From: Roger Schildmeijer <schildmeijer@gmail.com>
Subject: Re: write performance thrift interfaces
Date: Thu, 18 Mar 2010 19:08:09 +0100
To: user@cassandra.apache.org

Yes, 30 writes / s sounds a little bit poor.=20

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,
>=20
> 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.
>=20
> Are there some hints or suggestions?
>=20
> Cheers,
> Martin