On Tue, Nov 12, 2019 at 9:26 PM William Brown <will...@signalbox.org.uk> wrote:
> In my last role we moved from SGE to Slurm. > > > > However we did this by using VMs for all the control, login, slurmDBD and > MariaDB nodes, so it was easy enough to build a Slurm cluster up to the > point where it needed compute nodes. We then removed compute nodes in > groups from SGE, reinstalled with CentOS 7 and then added them to the Slurm > cluster. Previously they had been CentOS 6 but that was unsustainable. > Doing it this way removed the time pressure as we could allow users to use > both in parallel for a while, and so it was not so hard to switch off the > SGE cluster. > > > > We also started using Lmod (and EasyBuild) which hugely improved the > management of installed software, but that is an aside. > > > > The only issues that we had were where we had some locations in $PATH that > still had SGE binaries like qsub. We installed the slurm-torque RPM as it > provides wrappers that allow us of familiar commands like qsub with Slurm. > We just had to make sure that the Slurm wrappers were found first in the > $PATH. You may have to work out where those are as I expect that you want > to keep the current OS build if you are suing xCAT. > > > > There is then the small matter of retraining users; there is a ‘rosetta’ > PDF out on the Internet which shows equivalent commands for several > schedulers, which was helpful. Most users were not expert in SGE so did > not have complex scripts or a great desire to keep it. There were a few > bioinformatics packages that support SGE and do not really support Slurm > but they are few. > > > > There is a lot more support (like here) for Slurm than I think that you > will find for SGE. > > > > William > > > Hi, Our conversion is done successfully. So we salute and say goodbye to SGE. We are happy to be part of the Slurm community. Viva #OpenSource! Have a nice weekend, Quy > *From:* slurm-users <slurm-users-boun...@lists.schedmd.com> *On Behalf Of > *Nguyen Dai Quy > *Sent:* 12 November 2019 14:38 > *To:* Slurm User Community List <slurm-users@lists.schedmd.com> > *Subject:* [slurm-users] Replace SGE by Slurm on running cluster > > > > Hi list, > > We have a small HPC Linux Cluster (CentOS 7, xCAT,...) with 8 nodes > running actually with SGE. > > We would like to replace SGE by Slurm. > > > > Do you have any experience with this kind of work? > > > > Thank you, > > >
