Just wanted to follow up on this.
We were never able to achieve throughput scaling in the cloud. We were able to
verify that many of our cluster nodes and test servers were collocated on the
same physical hardware (thanks Stu for the tip on the Rackspace REST API), and
that performance on coll
I'll just add that CPU usage hovered around 50% during these tests.
On Jul 19, 2010, at 3:51 PM, David Schoonover wrote:
> Sorry, mixed signals in my response. I was partially replying to suggestions
> that we were limited by the box's NIC or DC's bandwidth (which is gigabit, no
> dice there).
be about 40reads/s.
High tested throughput may because of the Linux FS cache, if your dataset is
small (for example only 1GB).
Try to test the random read throughput on 100GB or 1TB, you may get different
result.
On Sat, Jul 17, 2010 at 7:06 AM, Oren Benjamin
mailto:o...@clearspring.com
Certainly I'm using multiple cloud servers for the multiple client tests.
Whether or not they are resident on the same physical machine, I just don't
know.
-- Oren
On Jul 18, 2010, at 11:35 PM, Brandon Williams wrote:
On Sun, Jul 18, 2010 at 8:45 PM, Oren Benjamin
nto some connection
limit? I don't see anything pegged in the JMX stats.
On Jul 17, 2010, at 9:07 AM, Jonathan Ellis wrote:
> On Fri, Jul 16, 2010 at 6:06 PM, Oren Benjamin wrote:
>> The first goal was to reproduce the test described on spyced here:
>> http://spyced.blogspot.c
I've been doing quite a bit of benchmarking of Cassandra in the cloud using
stress.py I'm working on a comprehensive spreadsheet of results with a
template that others can add to, but for now I thought I'd post some of the
basic results here to get some feedback from others.
The first goal was
>From the stress.py code, it looks like the default storage-conf.xml was used
>(at least schema-wise). I'll give that a go for now.
On Jul 1, 2010, at 1:31 PM, Oren Benjamin wrote:
As a first step, I'd like to reproduce the test from
http://spyced.blogspot.com/2010/01/cassand
As a first step, I'd like to reproduce the test from
http://spyced.blogspot.com/2010/01/cassandra-05.html on my current setup.
Can you post the storage-conf.xml that was used so that I can match the
settings as much as possible?
Thanks,
-- Oren
On Jul 1, 2010, at 3:15 AM, Oren Ben
ache.org/cassandra/CloudConfig (Rackspace is conspicuously
missing).
-- Oren
On Jun 30, 2010, at 1:58 AM, Jonathan Ellis wrote:
You could be seeing GC pauses. Did you increase the heap size you gave
Cassandra, when you increased your VM size?
On Tue, Jun 29, 2010 at 11:57 AM, Oren Benjamin
ma
Hi all - first timer here.
I'm experimenting with Cassandra on Rackspace Cloud. Started with 4GB nodes
and saw read latency spikes while streaming was taking place, so I increased to
8GB to see if limited memory was the issue. Now I'm seeing very strange
behavior during any period that writes
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