Difference: ComputingTopics (2 vs. 3)

Revision 32014-07-24 - samir

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Computing Topics

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  • T3 Storage - CEPH commissioning, start testing with WN storage.
  • Try registering T3-Higgs as T3_US_Caltech and mimic the T2 activities. Could observe how a "CEPH site" would behave.
    • In principle no mistery, if file reading by jobs and GridFTP works. Already tested ROOT access. Works better than Hadoop (support merging natively)
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  • CEPH Validation checklist
    • Works with all ROOT operations - opening, merging and updating file -- doesn't work in HDFS, works in CEPH
    • Running CMSSW jobs -- test stage-out
    • GridFTP transfers
    • Checksum calculation for standard Linux tools
    • Test Caching policy and functionality -- Cache node disks have to serve as a RAID0.
    • Partial replication -- less than factor of 2 usable space.
 -- Main.samir - 2014-07-10
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