On Thu, Aug 26, 2004 at 10:05:37PM +0200, Tim Schmielau wrote:
It should be easy to combine the data collection enhancements from
CSA and ELSA to provide a common superset of information.
ELSA uses current BSD accounting. The only difference with BSD is that
accounting is done for a group of processes. I didn't use PAGG and
rewrite something because I thought (I was wrong) that PAGG project
wasn't maintained. I continue to maintain ELSA just because there is, until today, no solution for doing job accounting. So, the data collection enhancements from ELSA is not very useful.
With the new BSD acct v3 format, it should be possible to do per job
accounting entirely from userspace, using pid and ppid information to
reconstruct the process tree and some userland database for the
pid -> job mapping. It would, however, be greatly simplified if the
accounting records provided some kind of job id, and some indicator
whether or not this process was the last of a job (group).
I like this solution.
In fact what I proposed was to have PAGG and a modified BSD accounting
that can be used with PAGG as both are already in the -mm tree. But
manage group of processes from userspace is, IMHO, a better solution as
modifications in the kernel will be minimal.
Therefore the solution could be to enhance BSD accounting with data
collection from CSA and provide per job accounting with a userspace
mechanism. Sounds great to me...
Best,
Guillaume
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