Populating the database
Ship ~400,000 events in FZ files to CERN on 3590 tapes
Run CMSOO on 10 PCSF machines in parallel (30 minutes per 10 FZ files)
- Ensure each PCSF machine processes a different tape
- Objy locking problems a nightmare.
- OO_LOCK_WAIT didn’t seem to work in either MROW or non-MROW modes.
- Writing to different containers in the same database caused periodic lock-ups.
- In the end we chose to write to completely separate databases.
- Stage tape file (tar file containing 10 FZ files) to Shift19
- Copy tar file to local PCSF disk
- tar to extract the 10 FZ files
- select name of Objy database to be written (defined by FZ file number)
- set Objy environment variables
- OO_FD_BOOT, OO_DB_NAME, OO_CACHE_MAX=1000, OO_CACHE_INIT=500, OO_LOCK_WAIT=-200
- run CMSOO