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  • Accessing data from the Tier-2 dCache
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You can run fireworks (cmsShow) on your laptop or desktop machine and access data directly from our Tier-2 dCache.
Just put the prefix 'root://dcache-00.rcac.purdue.edu/pnfs/rcac.purdue.edu/data/' in front of the LFN.

Example:
> cmsShow root://dcache00.rcac.purdue.edu/pnfs/rcac.purdue.edu/data/store/data/BeamCommissioning09/MinimumBias/RAW-RECO/SD_AllMinBias-Jan23Skim-v1/0014/AC5CE429-B809-DF11-85F1-0026189438A9.root

2)
To copy a single file from the Tier-2 dCache to your local machine (laptop or desktop) you can use the command xrdcp.

Example:
> xrdcp root://dcache-00.rcac.purdue.edu/pnfs/rcac.purdue.edu/data/store/mc/Summer09/InclusiveMu5_Pt250/GEN-SIM-
RECO/MC_31X_V3_7TeV-v1/0054/1A5252A3-AB99-DE11-9586-00E08145ED8F.root my.root

Please see the details at https://silicondetector.org/display/xrd/xrdcp

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