What is Virgo ?
Computing activities
Analysis activities
Useful links
Getting started
Other GW groups

Getting started

Read through and follow the procedure described below!

How to use this Twiki

If you are reading this, it means that you already have a Twiki account. Use the "Raw edit" button to edit pages, it's much faster then the WYSIWYG editor.

Getting a certificate

In order to use the Virgo-Ligo computing facilities one needs a certificate. The easiest way is to get a certificate is to request one from the RMKI CA, here, or if you have a CERN NICE account you can obtain a certificate from here

AFS account

For the KFKI AFS user home areas and Virgo Group project space /afs/kfki.hu/project/virgo you need an AFS account. If you don't have, ask for one by sending an e-mail to


You can find further info about the KFKI AFS system on the KFKI AFS Twiki Web

Registering in the Virgo Virtual Organisation

In order to use various computing facilities and have the proper access rights to the data you have to be a member of the Virgo Virtual Organisation. With you certificate loaded into your browser register yourself on the Virgo VOMS Server

Grid User Interface

Having an AFS account one can use the u1.kfki.hu and u2.kfki.hu machines which are Grid User Interfaces. However if you are running Red Heat binary compatible Linux distribution on your laptop (SL,SLC,CentOS, RES,etc), then you can use the AFS UI. To have a pre-configured Grid UI environment in your shell you just have to source the following files (depending on your shell):

.  /afs/kfki.hu/project/virgo/gliteUI/current/etc/profile.d/grid-env.(c)sh

Account for LSC , LDG

In order to be able to use the CCs @ Caltech you have to register (with your certificate) and follow the Instructions here: https://ligo.aset.psu.edu/account.shtml Give your mobile phone as contact, since they will call you back in order to confirm the registration.

Or write an email to userapp@ligo.aset.psu.edu asking for an LSC account.

Once you have the login, you can use your certificate to log into the ldas-grid.ligo-la.caltech.edu cluster, where you can submit jobs.

The LDG client description here: https://www.lsc-group.phys.uwm.edu/lscdatagrid/doc/index.html

Account for the Atlas cluster

When the various site admins receive your account request, they will create your account and inform you. Machine name is epimetheus.atlas.aei.uni-hannover.de, or h2.atlas.aei.uni-hannover.de.

Account for the LDAS clusters

Just as above, machine name is: ldas-grid.ligo-la.caltech.edu

Account for LHO

Just as above, machine name is: ldas-grid.ligo-wa.caltech.edu

Account for CIT

Just as above, machine name is: ldas-grid.ligo.caltech.edu

Account for the LIGO Directory

Visit and fill this page: http://roster.ligo.org/addUser.php?page=add

Account for the lSC Group

Visit and fill this page: http://www.lsc-group.phys.uwm.edu/cgi-bin/cvs-login-request.cgi

Account for the Cascina computing centers

You have to contact giuseppe.dibiase@ego-gw.it or antonella.bozzi@ego-gw.it to get an account. The machine names are:

  • farmn11.virgo.infn.it
  • farmn12.virgo.infn.it
  • farmn15.virgo.infn.it
  • farmn16.virgo.infn.it

Account for Lyon and Bologna

You have to ask to the Virgo responsibles for the two computing centers:

Account for Bologna

Simply go to http://www.cnaf.infn.it/main/index.php/en/Reparto_Rete_e_Sistemi_Informatici/Sicurezza_Informatica and follow the instructions. In the form you have to fill, please indicate Fulvio Ricci as INFN-CNAF contact person. Cnaf people will explain how to login. Help from:

Account for Lyon


A description about the LAL software: https://www.lsc-group.phys.uwm.edu/daswg/projects/lal.html

Account for the web pages:

Ask Gergo (Gergely.Debreczeni@cern.ch) for it.

Access to the DA pages and Cascina CC

Lot of useful info about DA: https://workarea.ego-gw.it/. To get access to these pages and for the Cascina CC, write an e-mail to: service@ego-gw.it

Virgo software

Info about the Virgo software here. For any help:

Data transfer and access from Bologna

Virgo data in Bologna

V2 h(t) realises are used for searches. You can find infos about data location at:


You will see that exists 3 h_t v2 realise, differing in the acquisition rate. In that page, at the beginning you have the ffl files: these are files which point to the actual data location and are used by the frame library through which we read the frame files with the data. If you can't still access the page, here is the location of the ffl files in Bologna:

All Virgo h(t)_V2 data should be about 1.4T. In the data there are obviously good and bad periods: we always use the data acquired when the ITF is in Science Mode. Moreover, there could still be problems which prevent from using the data. You can find the good segments, together with the veto etc, using the Virgo Data base:


Physycal storage is storm02.cr.cnaf.infn.it, the directories: /storage/gpfs_virgoX/virgo/data/ ,X=1,2,4,5,6

LIGO data in Bologna

LHO-H1 /opt/exp_software/virgo/virgoData/ffl/H-H1_RDS_C03_L2.ffl
LHO-H2  /opt/exp_software/virgo/virgoData/ffl/H-H2_RDS_C03_L2.ffl
LLO-L1 /opt/exp_software/virgo/virgoData/ffl/L-L1_RDS_C03_L2.ff

As for the good period in LIGO data, you could check if there are already these infos in the Virgo DA, otherwise you should use segFind, which is a LIGO tool.

As for installing the LIGO software and running in your cluster, you could refer to the pages about LIGO software I sent to you yesterday - to install, a part from LAL etc, also the tools they need. For CBC pipeline, you could ask to Frederique (marion@lapp.in2p3.fr) about what is the status at Lyon.

Storage @ RMKI

A 40 TB storage is available. To browse it's content you can go to the DPM browser, ot use the DPM CLI on one of the Grid UI to interact with the server. Docs on DPM CLI: https://twiki.cern.ch/twiki/bin/view/LCG/DpmApi

The RMKI Budapest Virgo Group

-- GergelyDebreczeni - 25 Nov 2008

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