NA48 Software Meeting
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10 May 2007
Present: Paolo, Augusto and Cristina
+ VRVS (Rainer?)
I) HEPDB Alan and Ginette had contacts with IT and succeeded
in making an update on hepdb in afs. In the future the update
will be done interactively by a na48 experts since there is no
more a server running all the time as in the past.
II) CDR news from Paolo
There have been already 4 phone sessions between Venelin
and the learning group Simone-Stefano-Emanuele-Paolo.
They are changing the scripts on the new CDR machine, at the
moment they are working on the watch-dog.
A twiki page is available with news and documentation:
https://twiki.cern.ch/twiki/bin/view/P326/CDR
There will be a meeting with Venelin in Frascati at the end of
the month.
III) Various news from Venelin and from Jan Van Eldik
a) Old CDR PC is kept alive since we do not have yet a completely new
working set-up for the CDR. At the moment is still used by users i.e. by
the runcompact_pc program.
b) Private disk-servers
All our private diskservers have a CASTOR backup done by Venelin.
These are old disk and they are given back to IT on friday 11 may.
They were not used in the last 2 weeks (by the way there was no RFIO
access)
and only one complaint that has been solved.
c) Stage pool
The new CASTOR2 stage pool suffered a huge load and this resulted in
time-outs for some of the file requests. This happened to .root files read
by private programs, and not on compact files, because compact has a
scheme to handle time-outs (i.e. tries to open a file, and if not possible
waits for some time and then tries again - 5 times). At the same time, to
make life more difficult, there was also one of our 5 disk servers not
working and various tapes disabled.... The solution was to add 3 additional
disk-servers (lxfs6012-6014-6123; recuperated from CASTOR-1) and in that way
to distribute the load on more machines.
The problem was not with the amount of data (not a disk space problem), but
again with the number of files to be staged.
- Peoples have practically all stopped using CASTOR-1 (only 3 users left
in the last week) ! -
Shut-down of CASTOR-1 stagena48 on monday.
----cristina
* * * * * * * * * * * * * * * * *
Cristina.Biino@cern.ch
CERN PH div. tel. 0041.227678729
portable CERN 164792 or 0041.764874792
* * * * * * * * * * * * * * * * *
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