Computing

ComputeCanada Resources

Compute Canada provides resources for all Tiers of ATLAS for Canadians. Here are some useful links to get you started:

• ComputeCanada Tier3s for sites that have Tier3 allocations

Resources

• How to apply for prioritized access to ATLAS-Canada only resources.

Help

• Computing Help
• Computing Trouble-shooting
• ATLAS Canada PCs at CERN

Fast Setups

• ATLASLocalRootBase V2 package
• ATLASLocalRootBase package (being phased out)
• manageTier3SW package
• Recommended Software versions
• VMWare Virtual Machine (atlas-vm) (yes, you can use a VM on your desktop.)
• Computing ATLAS of the Americas Tutorial Setup (use it at home or on a VM !)

Recipes

General

1. How to setup ssh key or password-less logins
2. How to run cron jobs on lxplus
3. Clean account for diagnostics (drastic action)

Grid

1. How to register and setup to use the grid
2. How to add a new grid certificate
3. How to renew a grid certificate
4. How to change your grid certificate password
5. How to convert your certificate and load into browsers

Athena

1. package version for a release
2. all versions of a package
3. How to list versions of packages with the defaults for your setup
4. How to search / browse Athena software
5. How to use ssh instead of kerberos to checkout packages
6. How to configure cmthome/requirements for multiple athena releases kits

Installations, Updating and Tips

Follow the steps in the following order to setup your desktop/laptop or cluster for ATLAS users.
You should also consult the Recommended Software versions as tested by ATLAS Canada user support.

1. management of ManageTier3SW (This is only for ATLAS maintainers who have privileges)
2. How to install/update Scientific Linux 4 (obsolete, please migrate to SL5).
3. Install_Scientific_Linux 5 (obsolete, please migrate to SL6).
4. Install_Scientific_Linux 6
5. Install_Scientific_Linux 7
6. Install afs (If you did not install with the Operating System)
7. How to setup Kerberos
8. How to install/update GLite UI (optional, yum method- works for i686; manageTier3SW can also install it.)
9. Install java (optional)
10. Install Atlantis (optional)
11. manageTier3SW package
12. ( How to install ATLAS software for a cluster or single user - this is no longer supported/needed if you use manageTier3SW).

ATLAS Canada Services

Please check for any scheduled downtimes by clicking on this link.

• CVS: browse mirrored ATLAS repository or use ATLAS Canada repository.
• LXR: cross-references of official ATLAS releases.
• Pacman: pacman mirror.

CERN links

• Main ATLAS Computing Wiki
• Computing Workbook
• Analysis Workbook
• Distributed Analysis using Ganga
• Distributed Analysis using Panda

Athena Releases

• Software Releases (links to automatic pages)
• Release Recipes (known problems, etc)

Development