Page Comparison

XRD-6

Lockless reads

• Can we have a continual test for Rob C’s script to continue to monitor (External gateways and internal).

XRD-11

Slow deletions

Ian Johnson

LHCb existing issue with slow deletions (up to 100s) of seconds. Ian to run dedicated tests within the RAL controlled environments.

Test runs using python multi-processing. Tested so far with 5GB files.

N/A

Corrupted LHCb file(s)

Thomas, Jyothish (STFC,RAL,SC)

Caused by write conflict between davs and gridftp. A variety of problematic outcomes observed from replication test. Xrootd/davs takes a couple mins to clean up after reporting failure

Proposal: On unlink call, remove any existing checksum first?

Discussion suggested this might be a more complex situation and warrants further though. Not mixing protocols might mitigate these situations (for the most part … )

XRD-8

Thomas, Jyothish (STFC,RAL,SC)

Compilation problems resolved; still seeing unlock calls.