====== Interoperation of GridWay with EMI-ES ======

The EMI-ES specification is an initiative of the [[http://www.eu-emi.eu|EMI project]] to unify job management and monitoring interfaces of ARC, gLite, and UNICORE. This document describes how to install and configure GridWay to submit jobs to EMI-ES endpoints.

Only the Nordugrid ARC implementation of EMI-ES has been tested.

===== Installation =====

  * Install the ''IGE'' and ''EMI'' repositories.

  * Install the ''gridway-EMIES'' package that provides the GridWay drivers to interface with EMI-ES endpoints. IGE, EMI and official repos must resolve all dependencies.

  * Alternatively, you can build and install the EMI-ES and dummy drivers by yourself.

===== Configuration of Drivers =====

The GridWay Configuration Guide provides complete information about configuration of the meta-scheduler. Next steps describe the specific configuration to interface with EMI-ES endpoints.

  * Add the following lines in the ''/usr/etc/gwd.conf'' file:
<file>
   # MADs for EMI-ES
   IM_MAD = static:gw_im_mad_static:-l etc/EMIES_hosts.list:dummy:emies
   EM_MAD = emies:gw_em_mad_emies::adl
   TM_MAD = dummy:gw_tm_mad_dummy:-u gsiftp\://<hostname>;cache=no
</file>

  * File ''/usr/etc/EMIES_hosts.list'' contains a list of nodes and files with static information of each node, this is an example:
<file>
  <hostname1> etc/<hostname1>.machine
  <hostname2> etc/<hostname2>.machine
  <hostname3> etc/<hostname3>.machine
  ...
</file>
The files ''/usr/etc/<hostname>.machine'' contain static information about each node where you want to send jobs. Please refer to the [[:documentation:release_5.14:cg|configuration]] guide for more details.

  * Some privileges are required to be set in the ''/etc/sudoers'' file. Please add the following lines.

<file>
   Defaults>GWUSERS env_keep="GW_LOCATION GLOBUS_LOCATION"
   #GridWay entries (EMI-ES MAD)
   gwadmin ALL=(GWUSERS) NOPASSWD: /usr/bin/gw_em_mad_emies *
   gwadmin ALL=(GWUSERS) NOPASSWD: /usr/bin/gw_tm_mad_dummy *
</file>

===== Using GridWay =====

The functionality and interfaces provided by GridWay are independent from the underlying Grid infrastructure. Please refer to the guides (user's guide, command reference, programming guide...) available at the [[:documentation|Documentation]] section.