1. Scheduling systems Carsten Preuß
LSF
PBS / Torque
SunGridEngine
Computing Cluster

2. LSF Many complains about LSF Many additional needs
No (real working) accounting
System behaviour somtimes unclear
Job resumeeing sometimes not working
Many additional needs
Faishare
Reporting
Job checkpointing / migration

3. LSF Why not upgrade tp LSF 7 ? Expensive
Licences will be counted on core base not on CPU base (what about HT?)
Need currently additional ~1600 licences
25€ to buy a license + 12,50€ per year

4. PBS / Torque Tested on a small cluster Has some instabilities
Easy to use and administrate (all config files are plain text files)
Only useable with Maui on top

5. SunGridEngine Currently installed on 30 nodes In use parallel to LSF
Will be extended to 70 nodes today
In use parallel to LSF
Test of slight migration from LSF to SGE
Test of dynamic behaviour in changing load situations
LSF is NOT reconfigured
ALICE users should be the first to use it

6. SunGridEngine
FairShare is working (has some problems with small fractions)
Support for job checkpointing / migration
Hardware usage can be strongly improved by moving from job slot based scheduling (LSF) to load based scheduling
Support for parallel environments
Somehow very complicated to use

7. Computing cluster
Department based queues will be replaced via Fair Share
Queues will depend on
needed environment (exclusive, parallel, ..)
resources
kind of jobs (analyse, simulation, ..)