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The Shared (General) Farm consists of several physical clusters that are available to all SLAC users. The cluster hardware was purchased incrementally over several years by various stakeholder groups. Each physical cluster is based on a specific hardware model but all hosts in the farm run 64bit RHEL/CentOS6. The LSF "general" queues feed user's jobs to the shared farm. The stakeholders have associated LSF user groups with a fairshare (scheduling priority) that reflects their cluster investment. This ensures that stakeholders will always get some runtime on the cluster when utilization is high. Users that are not members of stakeholder groups still have the ability to run jobs "for free". There is a superset fairshare group "AllUsers" that includes all SLAC users. A non-stakeholder must compete for priority with all other users running jobs on the shared farm. This may be acceptable for some, but production environments may demand priority scheduling. The free "AllUsers" fairshare is actually subsided by the paying stakeholders.

A stakeholder's fairshare value is derived from the compute power they have funded. A HS06 CPU benchmark is calculated for each cluster server model  

Cluster# of hosts# cores/host# of cores# Batch slotsHS06/slotHS06Owner/GroupPurchased dateNotes
fell - - - - - - -2007 IGNORE - obsolete hardware in run-to-fail mode
hequ39831231215.014683.12ATLAS9/23/2009 
hequ76860860815.019126.08Fermi9/23/2009 
hequ 77861661615.019246.16Babar9/23/2009 
dole381245645613.776279.12ATLAS10/19/2010 
kiso6824163213609.9713559.2ATLAS9/23/2011HT enabled/ 20 slots per host
bullet77.5161240124016.0519902PPA 12/5/2012for MPI use - do not map to fairshare
bullet76.25161220122016.0519581Fermi12/5/2012 
bullet17.751628428416.054558.2Geant12/5/2012 
bullet47.251675675616.0512133.8ATLAS2/13/2014 
bullet49.251678878816.0512647.4PPA2/13/2014 
bullet19.51631231216.055007.6Theory2/13/2014 
bullet32.51652052016.058346Beamphysics for MPI use - do not map to fairshare

 

 

They are automatically members of the "AllUsers" group - a superset that encompasses all SLAC users. 

 

 

 

 

 

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