14-18 October 2013
Amsterdam, Beurs van Berlage
Europe/Amsterdam timezone

Opportunistic Resource Usage in CMS

14 Oct 2013, 17:45
Veilingzaal (Amsterdam, Beurs van Berlage)


Amsterdam, Beurs van Berlage

Oral presentation to parallel session Facilities, Production Infrastructures, Networking and Collaborative Tools Facilities, Infrastructures, Networking and Collaborative Tools


Peter Kreuzer (Rheinisch-Westfaelische Tech. Hoch. (DE))


CMS is using a tiered setup of dedicated computing resources provided by sites distributed over the world and organized in WLCG. These sites pledge resources to CMS and are preparing them specially for CMS to run the experiment's applications. But there are more resources available opportunistically both on the GRID and in local university and research clusters which can be used for CMS applications. We will present CMS' strategy to use opportunistic resources and prepare them dynamically to run CMS applications. CMS is able to run it's applications on resources that can be reached through the GRID, through EC2 compliant cloud interfaces. Even resources that can be used through ssh login nodes can be harnessed. All of these usage modes are integrated transparently into the glideIn WMS submission infrastructure which is the basis of CMS' opportunistic resource usage strategy. Technologies like Parrot to mount the software distribution via CVMFS and xrootd for access to data and simulation samples via the WAN are used and will be described. We will summarize the experience with opportunistic resource usage and give an outlook for the restart of LHC data taking in 2015.

Primary authors

Dirk Hufnagel (Fermi National Accelerator Lab. (US)) Peter Kreuzer (Rheinisch-Westfaelische Tech. Hoch. (DE))


Ian Fisk (Fermi National Accelerator Lab. (US))

Presentation Materials