[slurm-users] Replace SGE by Slurm on running cluster

[Nguyen Dai Quy]

On Tue, Nov 12, 2019 at 9:26 PM William Brown <william at 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-bounces at lists.schedmd.com> *On Behalf Of
> *Nguyen Dai Quy
> *Sent:* 12 November 2019 14:38
> *To:* Slurm User Community List <slurm-users at 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,
>
>
>
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