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From Johan Oskarsson <>
Subject Re: Performance regression tests
Date Wed, 12 May 2010 08:13:08 GMT
I've started looking into how this issue. My current thinking are as follows.

Add support for Cassandra in Whirr:
This would allow us to start a short lived Cassandra cluster on one of the cloud services
(EC2/Rackspace etc) for testing.
Real hardware would of course be better, but this is a good starting point.

For running the actual tests I have been looking at YCSB:
I've added support for Cassandra trunk as of last week and am now off and on working on adding
an measurements export function so we can get the results as a JSON file. It's fairly straight

The best way to expose these results as graphs etc and raise an error if they are unexpected
would be a plugin to Hudson. That way all our test results are in one place.
Other projects such as HBase might be interested in contributing to a Hudson-YCSB plugin.
This would probably be best done as separate project on github for example.

If we want further results on how performance is affected by failures we could run with



On 11 maj 2010, at 20.38, Kushal Pisavadia wrote:

> Hi,
> Due to conflicting schedules, I was unable to take part in the GSoC this
> year. However, I'm still very interested in helping out the community for
> this specific case.
> Rather than just coding off a solution that would suit my own needs, I'm
> here asking for some help.
> What short-term goals do you have in mind? What long-term goals do you have
> in mind?
> I've had a look at the respective ticket —
> — but rather than just
> refactor the py_stress utility I'd like to make something that fulfils
> whatever needs that the current utility fails to meet.
> I'm also curious about how you'd like me to commit/expose my code.
> Originally I was thinking of creating a separate git repo, specific to this
> utility, but have no issues working from a fork on Github either.
> Kind Regards,
> Kushal Pisavadia

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