Rule of thumb for load on SVN with Crucible + Fisheye

Question

Hi everyone!

We're planning to use Crucible + Fisheye but have no idea about the load that this might cause on our SVN server. This is something our SVN admins will want to know ;-)

Is there some kind of rule of thumb that we could use to estimate the additional load on SVN by using Crucible + Fisheye? Something like "each project every ten minutes" or every commit times two?

Thanks in advance!

Steffen

Steffen Breitbach · Answer

Hi Everyone!

Thanks for your input, that really was helpful when talking to our SVN guys.

Regards
  Steffen

Contact Kintosoft · Answer

I never used FishEye, however the following is based on my guesses only.

FishEye seems to use caches extensivenly, so Subversion itself should not be too much overhead by using FishEye except during the initial loading because FishEye fetches all the versioned data:

* all the revisions and their metadata (properties): revision number, author, date and commit message
* all the changed files and directories for each revision
* the file contents to extract the key words (full text search - Lucene).

[I do not know whether Fisheye fetches all the files for each version or only the initial version and all the deltas]

Once FishEye is loaded and synchronized with Subversion, you should not see any overhead on Subversion unless maybe some peak if you make a big commit (you import a large project, for instance).

Despite FishEye can pull the changes every X time (minutes or seconds) or you can configure it to push the changes once that have been commited only, this is not an expensinve task for Subversion. The performance cost would depend on the commit size as I mentioned above.

So a quick and easy answar for your Subversion admin would be: you might see some overhead during FishEye initial loading/synchronization, so try to do it during the weekend, and for the daily basis you sould not see any extra overhead, maybe just the opposite as developers will fetch data from Fishye caches rather than Subversion directly.

Any correction/suggestion/improvement to my guess would be very appreciated.

Norman Abramovitz · Answer

Oh, and the real way to know is actually to do some measurements.  You might find you need to improve things before adding the new software.