Grid@Nikhef

The EGEE grid infrastructure can be accessed from any Nikhef desktop running Scientific Linux 3, 4 or 5. In order to use the EGEE gLite grid middleware, type

 . /global/ices/lcg/current/etc/profile.d/grid-env.sh        ## bash/ksh/zsh

or

 source /global/ices/lcg/current/etc/profile.d/grid-env.csh  ## csh/tcsh

first. This will set up all required environment variables for running the gLite middleware commands. (with special thanks to Egge van der Poel for finding all csh related errors ;-))

Depending on your operating system the appropriate version of the gLite grid middleware will be selected:

• Scientific Linux 3 : glite 3.0 (deprecated!)
• Scientific Linux 4 32bit and 64bit: glite 3.1
• Scientific Linux 5 32bit: glite 3.1
• Scientific Linux 5 64bit: glite 3.2

Type

 voms-proxy-init --voms <YOUR-VO>

to create a voms proxy. Sample output:

 $ voms-proxy-init -voms pvier
 Enter GRID pass phrase:
 Your identity: /O=dutchgrid/O=users/O=nikhef/CN=Some User
 Creating temporary proxy .......................................... Done
 Contacting  voms.grid.sara.nl:30000
 [/O=dutchgrid/O=hosts/OU=sara.nl/CN=voms.grid.sara.nl] "pvier" Done
 Creating proxy
 ................................................................... Done
 Your proxy is valid until Fri Dec  7 00:08:49 2007

If you see a warning similar to

 Wrong ownership on file: /global/ices/lcg/glite3.0.21/glite/etc/vomses
 Expected: either (0,0) or (UID, GID) = (0, 0)

then you safely ignore it. This is a feature of the voms software.

Congratulations! You are now ready to submit jobs to the EGEE grid using

 glite-wms-job-list-match myjob.JDL

and

 glite-wms-job-delegate-proxy
 glite-wms-job-submit myjob.JDL
 glite-wms-job-status
 glite-wms-job-get-output
...

Sample output:

 $ glite-wms-job-delegate-proxy -d janjust
 Connecting to the service https://graszode.nikhef.nl:7443/glite_wms_wmproxy_server
 ================== glite-wms-job-delegate-proxy Success ==================
 Your proxy has been successfully delegated to the WMProxy:
 https://graszode.nikhef.nl:7443/glite_wms_wmproxy_server
 with the delegation identifier: janjust
 ==========================================================================

 $ glite-wms-job-submit -d janjust HelloWorld.jdl
 Connecting to the service https://graszode.nikhef.nl:7443/glite_wms_wmproxy_server
 ====================== glite-wms-job-submit Success ======================
 The job has been successfully submitted to the WMProxy
 Your job identifier is:
   https://grasveld.nikhef.nl:9000/WlhqlLNLgnYc0tCqwiIM5A
 ==========================================================================

etc...