Direct User Support
De e-Ciencia
This page contains protocols and a number of examples about how to join, login and submit jobs to the IFCA Grid infrastructure. It is intended as a source of condensed information, with each point summarized here and expanded in a page of its own (if need be).
The instructions here can, and should, be followed by first-timers in a more or less sequential fashion.
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Get a Digital Certificate
Main article: DUS: Getting a Digital Certificate
The same than in any other Grid infrastructure the first step is obtaining a Digital Certificate issued by one of the Certification Authorities supported by the project. Digital Certificates are necessary for users to access the Grid in a secure manner. As a part of our interoperability politics, if you own a digital certificate signed by EGEE, it will also be valid in the int.eu.grid infrastructure.
- For the case of IFCA you have to contact Rafael Marco.
Join a Virtual Organization
Main article: DUS: Joining a Virtual Organization
As a second step, the user must join (at least) one of the VOs in which the int.eu.grid applications are grouped. Currently the following VOs are available:
- Medical Applications
- iUSCT - Ultrasound Computer Tomography
- ibrain - image-aided diagnosis in brain diseases
- High Energy Physics
- ihep - High Energy Physics applications
- Fusion Physics
- ifusion - fusion physics related applications
- Astrophysics
- iplanck - development of tools oriented to analysis of sky maps from the WMAP and Plank missions
- Environmental Models
- ienvmod - development of tools to study environmental models
The computing resources are distributed on a per VO basis. Therefore to be able to use some set of resources users must join a VO. If your application is not contained in any of the macro-areas before, we will consider to start a new VO for it.
- For details in this respect contact Isabel Campos
Get an Account on a Grid enabled User Interface
The institute has several User Interfaces (UIs) which can be appropriate. A unified access has been devised, through the GRIDUI User Interface, which is the current preferred UI.
- For details in this respect contact Rafael Marco.
Working on the Grid
First steps
Main article: DUS: Setting up the User Interface account
The user must first set up her working environment at the UI. The minimum setting includes managing the Digital Certificates, so that we can use them to authenticate ourselves when sending jobs. This is described more profoundly at DUS: Setting up the User Interface account.
Managing files on the Grid
Main article: DUS: Managing files on the Grid
The storing resources are abstracted by a special node type called Storage Element (SE), behind which a simple disk, a tape server, etc. can exist. In our work in the Grid, we will interact with the SEs through specialized tools called LCG tools. With them we will move around our files with ease.
Submitting jobs to the Grid
Main article: DUS: Submitting jobs to the Grid
The submission of jobs to the Grid is also done through dedicated tools, namely EDG tools.
The general scheme would be:
- Create a JDL file that will describe the job:
- Submit it with the corresponding EDG tool:
- Check the status of the job:
- Retrieve output when finished:
% vi test.jdl % edit at will and save
% edg-job-submit test.jdl
% edg-job-status https_id
% edg-job-get-output https_id
