CMS: Difference between revisions

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==Goals==
*L-Store plugin for root, so that rootio can read (write?) L-Store files
*CMS then uses REDDnet as temporary storage for user analysis (Tier 3 and below)
*Other CMS Applications possible, begin with above.


* xrootd integration into L-Store, to allow CMS analysis to use REDDnet storage (Engh)
==Current Work in Progress==


* The SRM L-Store interface should allow CMS to use REDDnet storage for CMS production running (MC, reconstruction, analysis).  This possibility needs to be further explored and developed with Ian Fisk, Brian Bockelman (Cavanaugh, Engh)
===Demos at March 2007 OSG Grid Meeting (UC San Diego)===
 
Can use Vladimir's or Dmitri's analysis for all of below.
 
====Interactive Root====
*First upload a file to Depots spread across the WAN, use LORSView to show where and how they go.
*Then read it back in root, show it works.
*Mainly an introduction to the issues.
 
====100 Node ACCRE Run====
*each reads its own file from WAN set of depots.
*show speed versus local copies of file (data tethered analysis).
 
====100 CPU Grid Job====
*similar to ACCRE Run, each job reads its own file from WAN depots.
*demonstrates complete lack of data tether.
 
====To Do To Get Ready====
*Run all of the above many times before actual demo!
*Get LORSview upload working
*Figure out how to submit 100 CPU Grid Job.
*Want to run all 100 ACCRE jobs simultaneously? Need to work with ACCRE on that...
 
==SRM interface==
*in principle, this is important for CMS usage. 
*Need to get new support person on board with this and up to speed.

Revision as of 10:15, 28 February 2007

Goals

  • L-Store plugin for root, so that rootio can read (write?) L-Store files
  • CMS then uses REDDnet as temporary storage for user analysis (Tier 3 and below)
  • Other CMS Applications possible, begin with above.

Current Work in Progress

Demos at March 2007 OSG Grid Meeting (UC San Diego)

Can use Vladimir's or Dmitri's analysis for all of below.

Interactive Root

  • First upload a file to Depots spread across the WAN, use LORSView to show where and how they go.
  • Then read it back in root, show it works.
  • Mainly an introduction to the issues.

100 Node ACCRE Run

  • each reads its own file from WAN set of depots.
  • show speed versus local copies of file (data tethered analysis).

100 CPU Grid Job

  • similar to ACCRE Run, each job reads its own file from WAN depots.
  • demonstrates complete lack of data tether.

To Do To Get Ready

  • Run all of the above many times before actual demo!
  • Get LORSview upload working
  • Figure out how to submit 100 CPU Grid Job.
  • Want to run all 100 ACCRE jobs simultaneously? Need to work with ACCRE on that...

SRM interface

  • in principle, this is important for CMS usage.
  • Need to get new support person on board with this and up to speed.
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