> Now keep adding clients until it stops making the numbers go up...
Neither adding additional readers nor additional cluster nodes showed
performance gains. The numbers, they do not move.
--
David Schoonover
On Jul 19, 2010, at 5:18 PM, Jonathan Ellis wrote:
> Now keep adding clients
r using a gaussian distribution, both
methods showed the same results.
Finally, we're using a random partitioner, so Cassandra will hash the keys
using md5 to map it to a position on the ring.
--
David Schoonover
On Jul 19, 2010, at 4:14 PM, Peter Schuller wrote:
> The following is completely
runs of inserts.)
My version is uploaded here:
http://gist.github.com/481966
--
David Schoonover
On Jul 19, 2010, at 4:26 PM, Juho Mäkinen wrote:
> I'm about to extend my two node cluster with four dedicated nodes and
> removing one of the old nodes, leaving a five node cluster. The
&
e else could attempt to
replicate our results. Ultimately, our goal is to see an increase in throughput
given an increase in cluster size.
--
David Schoonover
On Jul 19, 2010, at 2:25 PM, Stu Hood wrote:
> If you put 25 processes on each of the 2 machines, all you are testing is how
>
ted
hardware now to ensure that result was not an artifact of the cloud.
David Schoonover
On Jul 19, 2010, at 1:38 PM, Jonathan Ellis wrote:
> On Mon, Jul 19, 2010 at 12:30 PM, David Schoonover
> wrote:
>>> How many physical client machines are running stress.py?
>>
>&
stress.py uses multiprocessing if it is present, circumventing the GIL; we ran
the tests with python 2.6.5.
David Schoonover
On Jul 19, 2010, at 1:51 PM, Peter Schuller wrote:
>>> One with 50 threads; it is remote from the cluster but within the same
>>> DC in both cases. I
> Another thing: Is the py_stress traffic definitely non-determinstic
> such that each client will generate a definitely unique series of
> requests?
The tests were run both with --random and --std 0.1; in both cases, the
key-sequence is non-deterministic.
Cheers,
Dave
On Jul 19, 2010, at 1
ote:
> How many physical client machines are running stress.py?
>
> -Original Message-----
> From: "David Schoonover"
> Sent: Monday, July 19, 2010 12:11pm
> To: user@cassandra.apache.org
> Subject: Re: Cassandra benchmarking on Rackspace Cloud
>
> Hello all,
Hello all, I'm Oren's partner in crime on all this. I've got a few more numbers
to add.
In an effort to eliminate everything but the scaling issue, I set up a cluster
on dedicated hardware (non-virtualized; 8-core, 16G RAM).
No data was loaded into Cassandra -- 100% of requests were misses. Th
