LFC probes

LFC probes are provided by ch.cern and org.sam.

ch.cern

ch.cern/LFC-probe is part of grid-monitoring-probes-ch.cern RPM and contains metrics to check LFC service. The probe is written in Python and uses python-GridMon library.

• RPM: http://www.sysadmin.hep.ac.uk/rpms/egee-SA1/
• source code: http://www.sysadmin.hep.ac.uk/svn/grid-monitoring/trunk/probe/ch.cern/

Metrics

org.sam

org.sam/LFC-probe is part of grid-monitoring-probes-org.sam RPM and contains a metric to do cleanup of LFC's test area mainly used by WN metrics.

Metrics

org.sam.LFC-Cleanup

Given a directory in LFC the metric tries to delete all replicas of the files found in the current directory and then un-register the files. It's multi-threaded, works asynchronously and builds local cache (/var/lib/gridprobes/<VO or FQAN>/<namespace>/<hostname>/lfns.db - Python pickle format) of the files to be cleaned up to minimize load on LFC and speed up the cleanup process on restarts (after a definable timeout kicks in if the metric wasn't able to process all the files). Metric parameters:

--cleanup-timeout   <sec>   Cleanup timeout. (Default: 300 sec)
--cleanup-dir       <dir>   Directory to clean. (Default: /grid/<VO>/SAM)
--cleanup-file-ttl  <hrs>   Time for a file to stay on LFC. (Default: 15 days)
--cleanup-files-max <num>   Number of files to delete at most before timeout
                            kicks in. (Default: maxint)
--cleanup-threads   <num>   Number of cleanup threads. (Default: 5)