WRF4G Grid Resources currently are defined by ​GridWay Drivers, therefore if you want to access to Grid Resources, you must configure gwd.conf. This file is located under $GW_LOCATION/etc.

WRF4G GridWay Drivers Available

The following drivers are included in WRF4G:

• Information Driver:
  • BDII (gw_im_mad_mds2_glue-bdii)

• Transfer Driver:
  • Dummy Transfer driver (gw_tm_mad_dummy)

• Execution Drivers:
  • GRAM2 (gw_em_mad_gram2)
  • CREAM (gw_em_mad_cream)

Required Middleware

The following middlewares should be installed to use the corresponding drivers:

• Globus Toolkit 2 and above, and gLite 3.1 (GRAM2-based)
• gLite UI 3.2 (CREAM-based)

Configuration options Divers

Next steps describe an specific configuration of the drivers for Gisela Infrastructure. However, the examples below can be applied to any VO.

In file "$GW_LOCATION/etc/gwd.conf":

# Example GT2
IM_MAD = gt2:gw_im_mad_mds2_glue-bdii:-l etc/gt2.list -q (GlueCEAccessControlBaseRule=VO\:prod.vo.eu-eela.eu) -s bdii.eela.ufrj.br:tm_gt2:em_gt2
EM_MAD = em_gt2:gw_em_mad_gram2::rsl_nsh
TM_MAD = tm_gt2:gw_tm_mad_dummy:-u gsiftp\://ui01.macc.unican.es

# Example CREAM
IM_MAD = cream:gw_im_mad_mds2_glue-bdii:-l etc/cream.list -q (GlueCEAccessControlBaseRule=VO\:prod.vo.eu-eela.eu) -s bdii.eela.ufrj.br:tm_cream:em_cream
EM_MAD = em_cream:gw_em_mad_cream::jdl
TM_MAD = tm_cream:gw_tm_mad_dummy:-g

There are three options for the configuration of the IM MAD:

• -l: host list file to be used.
  • Example of gt2.list for Gisela Infrastructure:

    [user@ui~]$ lcg-infosites --vo prod.vo.eu-eela.eu ce | awk 'NR>2 {print $6}'|grep jobmanager |awk -F ":" '{print $1}' | uniq
    ce01-tic.ciemat.es
    ce01.unlp.edu.ar
    ce.labmc.inf.utfsm.cl
    tochtli.nucleares.unam.mx
    grid012.ct.infn.it
    ce01.eela.if.ufrj.br
    ce.cp.di.uminho.pt
    ce01.macc.unican.es
    ce01.up.pt
    grid001.fe.up.pt
    

  • Example of cream.list for Gisela Infrastructure:

    [user@ui~]$ lcg-infosites --vo prod.vo.eu-eela.eu ce | awk 'NR>2 {print $6}'|grep cream |awk -F ":" '{print $1}' | uniq
    gantt.cefet-rj.br
    ce206.cern.ch
    ce204.cern.ch
    ce205.cern.ch
    ce207.cern.ch
    ce208.cern.ch
    tochtli64.nucleares.unam.mx
    ce02.eela.if.ufrj.br
    cream01.cecalc.ula.ve
    ce.egee.di.uminho.pt
    cale.uniandes.edu.co
    grid001.fc.up.pt
    

• -q: it is possible to configure a GridWay instance to only use queues authorized to your VO by filtering them.
• -s: information server in a hierarchical configuration.

  IM_MAD = gt2:gw_im_mad_mds2_glue-bdii:-l etc/gt2.list -q (GlueCEAccessControlBaseRule=VO\:prod.vo.eu-eela.eu) -s bdii.eela.ufrj.br:tm_gt2:em_gt2
  

There are two options for the configuration of the TM MAD:

• -g: starts a GASS server.
• -u: specifies the URL of a GridFTP server running in the client. For example:

  TM_MAD = tm_gt2:gw_tm_mad_dummy:-u gsiftp\://ui01.macc.unican.es
  

WRF4G_BASEPATH="gsiftp://$WRF4G_LOCATION/repository/output" 
WRF4G_DOMAINPATH="gsiftp://$WRF4G_LOCATION/repository/domains"
WRF4G_INPUT="gsiftp://$WRF4G_LOCATION/repository/input"
WRF4G_APPS="gsiftp://$WRF4G_LOCATION/repository/apps"

Accessing the VOMS servers

To use the Grid Resources, the user should iniatilize the proxy through voms server:

[user@ui~]$ voms-proxy-init --voms prod.vo.eu-eela.eu
Cannot find file or dir: /oceano/gmeteo/users/carlos/.glite/vomses
Enter GRID pass phrase:
Your identity: /DC=es/DC=irisgrid/O=unican/CN=josecarlos.blanco
Creating temporary proxy ........................................ Done
Contacting  voms.eela.ufrj.br:15003 [/C=BR/O=ICPEDU/O=UFF BrGrid CA/O=UFRJ/OU=IF/CN=host/voms.eela.ufrj.br] "prod.vo.eu-eela.eu" Done
Creating proxy ................................... Done
Your proxy is valid until Tue Aug 23 22:15:06 2011