IntegrationPhase14
The period discussed here is July 1, 2010 to September 30, 2010.
Fabric upgrades
Analysis metrics and data access
- Continue work/studies on data access methods and effect on analysis efficiency with focus on Tier 2 queues
- Review comparisons of HC stress tests for various modes:
- stage-in dcache
- stage-in xrootd
- direct reading dcache
- direct reading xrootd
- stage-in dcache (WAN)
- stage-in xrootd (WAN)
- direct reading dcache (WAN)
- direct reading xrootd (WAN)
- local access (pending delivery of portable hammercloud)
- Some of these are default configurations already; one is novel in our context (remote xrootd access)
- Examine scalability/stability issues
- Summary plots with egg
CVMFS evaluation for US ATLAS Facilities generally
From software week and previous workshops, clear interest in CVMFS as a way of delivering software to facilities. In US ATLAS we've already had three generations of a software installation system, can this provide a more reliable and easier to manage system?
Some tests suggested by Graeme (following the Tier 3 work)
- Install cvmfs software at sites who are interested in testing.
- Validate that with a few jobs.
- Embark on stress tests, particularly with a view to comparing performance with a normal software area.
- Measure hit rate (perhaps via Squid)
The basic install instructions from Doug for Tier 3's are here:
https://twiki.cern.ch/twiki/bin/view/Atlas/Tier3CVMFS2SLC5
- One or two Tier 2 centers to evaluate in a large scale production environment.
dq2-FTS demonstrator and Tier 2 response
- Project twiki page: TestingDQ2FTS
- Identify gridftp + xrootd Tier 3 testbed targets
- Validate functionality for all Tier 2s
- Throughput measurements T2->T3
Caching testbeds
See discussions at software week and Amsterdam workshop.
Participation in caching testbeds.
- One or two sites to provide xrootd or http testbed
- Participate in caching efficiency studies for analysis jobs
PROOF demonstrator (T1/T2/T3)
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RobertGardner - 20 Jul 2010
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