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Where to write user CM2 collections

Summary:

Q: Many applications (Elf, Moose, SkimMiniApp) are setup to write output collections. Where should the user write those collections?

A: At all of the Tier-A sites a /work/users/ area has been (or soon will be setup). If you have not done it yet, you can create yourself an area in the /work/users area by using the KanUserAdmin application:


noric10> KanUserAdmin createuser
Creating /work/users/elmer area...
noric10>

In practice this corresponds to some NFS mounted filesystem (i.e. often with file paths starting with /nfs or something similar). You should never reference your collections using this full file path, but instead use collections starting with /work/users/<yourUsername> such as:

/work/users/elmer/14.5.2/elfevents1
There are several primary reasons for doing this:

This allows the same collection name (and tcl) to be used at different sites even if the actual file path to the relevant NFS area is site-specific
The eventstore design requires this in order for the "borrowing" of components (for example during skimming) to work properly.
In the near future tools (beyond KanUserAdmin) will be made available to back up collections written to the /work/users area and to move them between sites.

For most users this short answer should be sufficient. If you are interested in the details, please see the detailed explanation.

Last modified 04-May-2004, Peter Elmer