Thread:Project:Support desk/Class paper/reply (7)


 * ''I’ve found the WMFLabs Ganglia site. ... Is this the WMF production cluster or the WMFLabs virtual cluster or is it both?

'' The WMFLabs hardware does not serve Wikipedia or the sister sites like Wiktionary. For information on the the site that serves those sites, check out https://noc.wikimedia.org/.


 * Does the grid run under OpenMPI or something else?

See the noc site. I hadn't heard of OpenMPI before this. I think I can safely say "No" in answer to your question, but I'm not a good authority on that. Perhaps WMFLabs uses OpenMPI?


 * The four largest clusters by CPU count and my guesses as to their purpose are listed below.


 * Deployment-prep – 69 (page server?) Tools – 67 (MediaWiki, etc. development?) Visualeditor – 66 (visual editor development, testing, etc?) Analytics – 31 (http://reportcard.wmflabs.org/ ?)

No, deployment-prep is a set of configurations I helped set up using the WMFLabs infrastructure to test MediaWiki before it was deployed to the production servers. Documentation: https://wikitech.wikimedia.org/wiki/Nova_Resource:Deployment-prep/Overview

Tools is the Labs replacement for toolserver. Documentation: https://wikitech.wikimedia.org/wiki/Nova_Resource:Tools

You seem to be correct on visualeditor. https://wikitech.wikimedia.org/wiki/Nova_Resource:Visualeditor

You would have to ask the analytics team about their setup. https://wikitech.wikimedia.org/wiki/Nova_Resource:Analytics


 * What percentage of the 691 CPUs (or which clusters or nodes) actually directly support Wikipedia’s page serving function?

None. You've mistaken labs for the production cluster.


 * Are there any other “WOW!” statistics?

See this presentation: http://www.lugod.org/presentations/Wikimedia_Infrastructure_Utrecht_LUG_2011.pdf from a couple of years ago.