CMS Requirements for CVMFS, Frontier and Xrootd

Here is a list of CMS requirements/recommendations for the services to be deployed by the end of this year (2012).

This is not an official CMS document. I'm trying to summurize for my own purposes all the information that I could find so far.


CMS recommendations for the CVMFS deployment

Worker node

"Present recommendation is to put the cache on a separate partition and make the cache at least 6GB large."

Squid cache server

"CVMFS tends to put a very light load on a squid, much lighter than Frontier."


Installing Frontier Local Squid Cache Server

"For most purposes 2GHZ, 2GB, 100 GB should be adequate."

"Squid on one core of a modern CPU can pretty much keep up with 2 gigabits."

"Sites with over 500 job slots should have at least 2 squids for reliability."


CMS Xrootd Architecture

Xrootd proxy server


NAT that connects worker nodes to internet


-- PavelDemin - 14-Sep-2012

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Topic revision: r2 - 2012-09-14 - PavelDemin
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