(r4) StevenGoldfarbDQ2 < Main

Main Web>TWikiUsers>StevenGoldfarb>StevenGoldfarbNotes>StevenGoldfarbDQ2 (revision 4) (raw view)~~EditAttachPDF~~

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      <img src="https://twiki.cern.ch/twiki/pub/Atlas/WebPreferences/atlaslogo.png" alt="atlaslogo"/>
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---+!! Steve's Notes
---+!! _DQ2 Data Location & Retrieval_
    </td>
  </tr>
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---
[[StevenGoldfarbAthena][Athena]] | [[StevenGoldfarbVP1][VP1]] | [[StevenGoldfarbDQ2][DQ2]]
---

---+++ Find some data with DQ2 at CERN

See more detailed instructions at Atlas.WorkBookDQ2 .  The DQ2 Dataset Browser provides a  [[http://gridui02.usatlas.bnl.gov:25880/server/pandamon/query?overview=dslist][web interface]].  James Catmore's wiki on finding data: Atlas.DataPreparationReprocessing .

   1 Set up the environmental variables.
   <verbatim>
source /afs/cern.ch/atlas/offline/external/GRID/ddm/DQ2Clients/setup.sh
   </verbatim>
   1 Initialize the ATLAS VO proxy.
   <verbatim>
voms-proxy-init -voms atlas
   </verbatim>
   1 Search for some Zmumu data
   <verbatim>
dq2-ls mc12.\*Zmumu\*
dq2-ls mc12.\*Zmumu\*RDO\*
dq2-ls mc12.\*Zmumu\*AOD\*
dq2-ls -f mc12.005145.PythiaZmumu.genfast.AOD.v12000702
   </verbatim>
   1 Retrieve some data from the grid to castor
   <verbatim>
dq2-get /castor/cern.ch/user/g/goldfarb/Analysis/Zmumu mc12.005145.PythiaZmumu.genfast.AOD.v12000702
   </verbatim>

---+++ Using AMI to Get Dataset Information

The AMI browser can provide important information about various physics data sets, including what geometry was used in production.

   1 Find the geometry used for *valid1.005145.PythiaZmumu.digit.RDO.e322_s483*
      * Open [[http://ami.in2p3.fr:8080/AMI/servlet/net.hep.atlas.Database.Bookkeeping.AMI.Servlet.Command][AMI]] in a browser.
      * Enter =valid1.005145.PythiaZmumu.digit.RDO.e322_s483= in the top window.
      * Click on "Search Datasets"
      * Click on "Details"

---+++ Some Castor Commands

If data has been retrieved to castor, files can be manipulated with a few simple commands.  See Atlas.WorkBookCastor for a listing.  Here are some examples:

   1 List a directory
   <verbatim>
rfdir /castor/cern.ch/user/g/goldfarb/Analysis/Zmumu
   </verbatim>
   1 Copy a file to/from/within castor
   <verbatim>
rfcp /castor/cern.ch/user/g/goldfarb/Analysis/Zmumu/ZmumuPythiaEndCapOnlySim09950.pool.root ~/TestArea
   </verbatim>
   1 Move a file in within castor
   <verbatim>
rfrename rfcp /castor/cern.ch/user/g/goldfarb/Analysis/Zmumu/ZmumuPythiaEndCapOnlySim09950.pool.root /castor/cern.ch/user/g/goldfarb/Analysis/Zmumu/StevesFavoriteFile.pool.root
   </verbatim>
   1 Remove a file from castor
   <verbatim>
rfrm /castor/cern.ch/user/g/goldfarb/Analysis/Zmumu/StevesFavoriteFile.pool.root
   </verbatim>

---
*Major updates*:%BR%
-- Main.StevenGoldfarb - 05 Sep 2006
-- Main.StevenGoldfarb - 29 Jan 2009 (made current)

Topic revision: r4 - 2009-02-01 - StevenGoldfarb

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