Kilrain - System Maintenance
Navy DSRC Preventive Maintenance (PM) for the IBM iDataPlex system, KILRAIN, is scheduled for Tuesday, 19 March 2013, from 1200 CT to 1900 CT.
The focus of this maintenance is general system administrative activities that cannot be performed during normal Production usage. The main change will be enabling GPFS file system quotas. Users will be limited to 20 TB of disk storage under their $WORKDIR directory and 10 GB of disk storage under their $HOME directory. Users can use the BCT-mandated show_storage command to list usage and quota information in KB units. Additional Infiniband Fabric performance tuning changes will also be enabled.
It is recommended that users clean up their directories in both filesystems (/u/home and /scr) to a value below these anticipated quota limits prior to this PM. Following the PM, users over their quota will be unable to write files to their directories. Due to the filesystem scrubber being enabled as well, older data will be scrubbed from /scr first. Any data users would like to retain should be moved to external storage space or archived to NEWTON. Given the current level of /scr filesystem usage, about 40%, files accessed beyond 21 days will be scrubbed first. To see files in $WORKDIR older than 21 days, users may run:
/usr/bin/find $WORKDIR -atime +21 -mtime +21 -type f -print