GlueX Offline FAQ

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Revision as of 12:41, 2 December 2011 by Marki (Talk | contribs) (How do I get emails when files are checked into the source code repository)

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This is the GlueX Offline Frequently-Asked Questions list. If you cannot find an answer to your question, please send it to the Offline Software Coordinator (currently Mark Ito).

General

Where do I find information about GlueX software?

The best place is this wiki. The highest-level page dealing with software is the Offline Software page. The offline page is linked from the front page of the wiki at http://wiki.gluex.org .

GlueX

How do I get an account on the wiki?

To prevent spam, only registered users are allowed to post on the wiki. To prevent spammers from becoming registered users, random visitors are not allowed to create their own accounts on the wiki. To get an account, contact the current Offline Software Coordinator or a former Coordinator (Mark Ito, David Lawrence). They have the privileges to create an account.

In your request, send a suggestion for your user name on the wiki. You will receive a password which you should change to something more to your liking. Passwords can be changed using the "preferences" link at the top of each wiki page once you are logged in. Please do not use your JLab user account password for this purpose, for security reasons; the way passwords are stored on the wiki is not all that secure.

How do I get privilege to check stuff into the repository?

Become a member of the halld unix group.

How do I get emails when files are checked into the source code repository?

Ask David or Mark to add you to the list. Alternately, edit the file yourself. It is /group/halld/Repositories/svnroot/hooks/post-commit .

JLab

How do I install a certificate in my browser so that I can smoothly view "certified" web sites at JLab?

Go to http://cc.jlab.org/JLabCAs/ and select the browser you are using, and follow the instructions thereunder.

-- Richard Jones

How do I become a member of the halld Unix group?

Ask the Software Coordinator to add you.

How do I get personal web space at JLab?

The standard /home/username/public_html has been deprecated at the Lab as of August 2011. Another system has been set up on the /userweb partition. There is a HOWTO that explains the procedure for getting space there.

What is the Volatile disk?

We now have access to up to 40 TB of disk space on the "volatile" file system.

  • storage is temporary; there are scripts which run to delete old files
  • a quota system is enforced by the operation of these cleaning scripts
  • the system has two disk usage level triggers, called "quota" and "reservation", the former is a global maximum per group, the latter is used when the disk as a whole runs out of space (the sum of all quotas exceeds the available space, by design)
  • the system is explained at the bottom of the page referenced in Sandy's message

The /volatile partition is only available from the farm nodes at the Lab. This space is independent of our "work" space (/work/halld). Work space is not subject to deletion by scripts.

Two possible use cases for this space are (1) for staging files into and out of farm nodes and (2) for storage of data that are permanently stored elsewhere (e. g., on tape) for repeated analysis at the Lab.

There is a directory, /volatile/halld/home, for users to put their personal directories.

See http://scicomp.jlab.org/disk/volatile.faces for details of who has what space and how the space is managed.