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= gwd.conf file =

'''WRF4G Grid Resources''' are currently defined by [[http://www.gridway.org/doku.php?id=documentation:release_5.8:cg |GridWay Drivers]]. Therefore, if you want to access to Grid Resources, you must configure '''gwd.conf'''. This file is located under `$WRF4G_LOCATION/opt/drm4g_gridway/etc` directory.

== WRF4G !GridWay Drivers Available ==

The following drivers are included in '''WRF4G''':
 * Information Driver:
    * BDII (gw_im_mad_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)
* UMD1 or UMD2 (CREAM-based)


== Configuration options Divers ==

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


In file `$WRF4G_LOCATION/opt/drm4g_gridway/etc/gwd.conf`:

{{{
#!sh
# Example MAD Configuration for GISELA
# GT2 
IM_MAD = gisela_gt2:gw_im_mad_bdii:-q (GlueCEAccessControlBaseRule=VO\:prod.vo.eu-eela.eu)(GlueCEImplementationName=LCG-CE)  -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

# CREAM
IM_MAD = gisela_cream:gw_im_mad_bdii:-q (GlueCEAccessControlBaseRule=VO\:prod.vo.eu-eela.eu)(GlueCEImplementationName=CREAM)  -s bdii.eela.ufrj.br:tm_cream:em_cream
EM_MAD = em_cream:gw_em_mad_cream.py::jdl
TM_MAD = tm_cream:gw_tm_mad_dummy:-g
}}}
There are two options for the configuration of IM MAD:
* -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.
{{{
#!sh
IM_MAD = glisela_gt2:gw_im_mad_bdii:-q (GlueCEAccessControlBaseRule=VO\:prod.vo.eu-eela.eu)(GlueCEImplementationName=LCG-CE) -s bdii.eela.ufrj.br:tm_gt2:em_gt2
}}}

There are two options for the configuration of the TM MAD:
* -g: starts a [[http://www.globus.org/toolkit/docs/2.4/gass/ | GASS]] server for each user.
{{{
#!sh
TM_MAD = tm_gt2:gw_tm_mad_dummy:-g
}}}      
* -u: specifies the URL of a [[http://globus.org/toolkit/data/gridftp/ | GridFTP]] server running in the client. For example:
{{{
#!sh
TM_MAD = tm_gt2:gw_tm_mad_dummy:-u gsiftp\://ui01.macc.unican.es
}}}

For more information about MAD configuration see [http://www.gridway.org/doku.php?id=documentation:release_5.10:cg GridWay Configuration Guide]

[[NoteBox(note,Now\, delete `mycomputer` resource and try to configure WRF4G on another resource)]]

== Accessing the VOMS servers ==
In order to use the Grid Resources, users should iniatilize the proxy through voms server:
{{{
#!sh
[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
}}}