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The drain time for a farm is too long to be considered for anything but the most dire interventions. You don't need to drain the queues, just temporarily stop the jobs. For PBS/torque: qsig -s STOP `qselect -q whetever -s R` reboot, and restart the jobs qsig -s CONT `qselect -q whatever -s R` Martin. > -----Original Message----- > From: LHC Computer Grid - Rollout > [mailto:[log in to unmask]] On Behalf Of > Maarten Litmaath > Sent: 27 June 2005 16:17 > To: [log in to unmask] > Subject: Re: [LCG-ROLLOUT] rebooting a CE > > > Jeff Templon wrote: > > > Hi *, > > > > We need to reboot our CE soon (kernel upgrade). Used to be if you > > rebooted a CE machine, condor-G on the WMS would decide > that your jobs > > must all be dead, and restart them elsewhere. > > That is a long time ago. These days jobs in steady state are not > affected by a reboot of the CE or the RB. Jobs in transit (e.g. > just finishing) will fail. > > > What is the situation now? Do we need to drain queues > before rebooting? > > Draining the queues is always a good idea. >