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• Presentation from Georg Schuhardt (15m) regarding XCache and direct filesystem access: • Many questions about the read performance of direct access in 5.0. Possible bug, Andy and Georg will investigate. • Possibly a bug in the ACL’s of direct access. • Slides: https://drive.google.com/file/d/1kCt0IqMFY45XDp6aJsfzC4nnj0kVyGsI/view?usp=sharing • Development Updates • 5.0.1 is released, and built in OSG • 4.12.4-rc1 was just released • Staggering the release with the 5.0.1 • May put more patches into the 4.12.4 before release. • OSG will product compat libraries in order to allow 5.0 be uploaded to EPEL • 5.1 manual now live in on xrootd website: https://xrootd.slac.stanford.edu/doc/dev51/xrd_config.htm • New monitoring and gstream configuration formats • 5.1 each server will have a fingerprint in the gstream. • Will be documented in the monitoring data. • ATLAS Updates • Status of caching g-stream changes • CMS Updates • UCSD cooling issues. • High availability setup with redirector seems to work for CMSSW jobs, but not for xrdcp. Always picks the “first” one. • But xrdcp should move on to the next one. • Discussion of whether it was DNS issues, or something else. • CMS XCaches in the US: 3 • CMS XCaches in containers: 0 • StashCache (OSG) Updates • some discussion of stashcp’s behavior. How many caches to try before failing? (2? 3? all? 4?) • (John Hicks) • Houston node back on line, will be part of the PRP nautilus cluster • Kansas is back up as well, but still something wrong. • Amsterdam is made through customs. Racked, but still being setup. • (Brian) Hot fix detection and image build in today • StashCache on EL8 works fine. • AOB • Discussion of how to pick the nearest server • Can always perform a xrootd ping (in the xrootd protocol) • Currently use GeoIP in stashcache world • Next week: • Edgar’s talk about the CMS datalake • GSOC presentation from riccardo’s student. • Move meeting ahead 30 minutes next week to accommodate Eurpoean time zones.