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Item | Presenter | Notes | |||||||||
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Deployment plan and changes anticipated before Christmas | |||||||||||
bugfix for calculating striper objects in direct reads | https://github.com/stfc/xrootd-ceph/pull/50 Any further comments on the PR; or ready to merge ?
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Gateway: observations and changes | Change the CMSD configuration to increase the frequency of load reporting / calculation   | ||||||||||
Checksums fixes | Deployment appears to improve that metadata retrieval time at the checksum app layer, but not from the user client layer …  | ||||||||||
Prefetch studies and WN changes | New tests with     | ||||||||||
Deletion studies through RDR | Requirements from ATLAS VO (Alessandra): 11266 deletions/h of 3GiB files. We are mean seeing deletion times for 3GiB files of 0.5 - 4 seconds, however there are some large outliers. (Taken from 10 deletions of 3GiB batches, 500 files in each batch).  Current deletion times to delete a batch of 500 3GiB files average around 30s (with some large outliers, however). Extrapolating from the average would suggest a bulk deletion rate of 60,000 files per hour is achievable within RAL, using the CERN deletion timing program. It would be instructive to find test whether the deletion mechanism that ATLAS will use during DC24 (FTS?) is able to achieve acceptable deletion rates. An example of the variation in range of deletion times (plots from 07:30 this morning and 11:40):   | ||||||||||
Tokens testing |
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SKA Gateway box | /wiki/spaces/UK/pages/215941180 Deneb-dev routing still needed (on the Switch / router side). Some tests with Ceph-dev and changing of the rados-striper Difference between upload and download may be due to uploads from local disk, downloads to /dev/null. (to repeat with tmpfs). | ||||||||||
WN Xcache issue | futex lock hard locking xcache proxy on WNs (possibly occurrence of https://github.com/xrootd/xrootd/issues/1979 ) |
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