Infrastructure Status

  • dCache sites have stabilized.
  • I think we're ready for Purdue and Wisconsin to enter production. Any objections?

Action Item Status

  • ML Progress (MT): No news and probably no progress. Matevz somewhat lost in transition between CERN and UCSD.
  • Nagios progress: New nagios probe for picking a "random" file from PhEDEx in production. Deployed for Nebraska; others will sites will follow suite after keeping an
  • JobRobot: Ready to go? It's not currently run by 'cron' by HammerCloud.
  • FKW group usage: They have been ntuple-izing a large amount of data coming out of the detector. Currently, runs all of this with Xrootd. Submits regular grid jobs to UCSD using custom scripts; data is read via redirector. Xrootd is not seen as a problem for the first 20 picobarns. No negative effects on performance or failure rates. We think Yanjun uses redirector directly, not fallback. When we run into trouble, Matevz will help out.
  • Xrootd 3.0.3: final release is out! Will work on getting sites to upgrade.
  • Scalability tests: Igor did a scalability test for 'xrdcp': found it degrades after about 100 simultaneous clients / server. Server lasted up to 500 clients; did not crash in the end. Probably mostly overhead related to login via GUMS.
  • Igor has come back with some proposals for glidein integration. Evaluating.


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Topic revision: r2 - 2011-04-22 - MatevzTadel
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