RAL Tier1 weekly operations castor 17/08/2015

Operations News

CMS disk read issues much improved.
- Changed I/O scheduler for cmsDisk nodes from 'cfq' to 'noop'. We are now seeing performance roughly in line with other CMS Tier 1 sites.
Disk server draining on hold due to ATLAS being very full

The large numbers of checksum tickets seen by the production team are not thought to be due to the rebalancer. The source of these needs to be identified. Shaun is investigating
The gridmap file on the the webdav host lcgcadm04.gridpp.rl.ac.uk is not auto-updating.

Stress test SRM poss deploy week after (Shaun)
Upgrade CASTOR disk servers to SL6
- One tape-backed node being upgraded, more tape-backed nodes next week.
Oracle patching schedule planned. (End 13th October)

Tasks

Interventions

SdW to modify cleanlostfiles to log to syslog so we can track its use - under testing
SdW to look into GC improvements - notify if file in inconsistent state
SdW to replace canbemigr test - to test for file that have not been migrated to tape (warn 8h / alert 24h)
SdW testing/working gfalcopy rpms
RA/JJ to look at information provider re DiRAC (reporting disk only etc)
RA to look into procedural issues with CMS disk server interventions
RA to investigate why we are getting partial files
BC to document processes to control services previously controlled by puppet
GS to arrange meeting castor/fab/production to discuss the decommissioning procedures
GS to investigate providing checks for /etc/noquattor on production nodes & checks for fetch-crl - ONGOING
BD to chase AD about using the space reporting thing we made for him
Someone - mice, what access protocol do they use?
GS to investigate how/if we need to declare xrootd endpoints in GOCDB BDII