Hello everyone,
This is a little late notice, but I have returned from jury service to
inform all of you that there is another ATLAS_PANDA HammerCloud test
scheduled for the UK, starting at 11am (CERN time).
http://gangarobot.cern.ch/hc/540/test/
If you wish to take the best advantage of this test, I suggest
following the advice in the thread for the previous HammerCloud, last
week.
Briefly:
Modify the fairshares in /var/spool/maui/maui.cfg to alter the MAXPROC
value for atlas pilot roles (probably mapped to an atlaspil or
pilatlas group on your system), and gently walk your values up to some
maximum at two hour intervals. Making the fairshare weighting
(FSTARGET) for the atlas pilot role very large (>1000000) will ensure
that maui tries to get as close as possible to MAXPROC at any point in
time.
(For all sites, I suggest starting with some data points at low
concurrencies - 10 or 25 or so, to give a sense of what your storage
is like fairly unstressed, then walking up to at least half the values
in the list below:
RALPPD 400
OXFORD 350
CAMBRIDGE 200
BIRMINGHAM 50
GLASGOW 1600
SHEFFIELD 150
MANCHESTER 1300
LANCASTER 550
LIVERPOOL 650
RHUL 400
QMUL 1150
UCL 50
You have 48 hours of test, so smaller sites should be able to manage
up to 100% of those values (which are the ATLAS maximum slots for your
site), and in general, if you have time left over, it's worth trying
to push above the 50% level for interest. )
Changes to last time are mainly that the jobs are coming from a single
test. This is to make it easier for sites (and ATLAS) to see precisely
what is going on at all times.
Good luck,
Sam
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