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Re: [HTCondor-users] swap space

Thanks Dimitri

Yes, in the worker nodes we do have 3G per core in average, some nodes have 4G per core.

I was asking for requirements of the server where the htcondor central daemons are running. We have all the central services of htcondor running in a single server. I was referring to this server in my previous mails.

Thanks and regards,


On 20/11/18 17:05, Dmitri Maziuk via HTCondor-users wrote:
On Tue, 20 Nov 2018 14:34:09 +0100
Almudena Montiel <almudena.montiel@xxxxxx> wrote:

As for SWAP, we have increased it to 48G. Hopefully that will be fine.
Well the longer answer is if you have to swap, your performance will go down the drain even if you gon't get as far as thrashing. E.g. we run BLAST, it memory-maps its search database in ~2GB chunks, we tried running it with less than 2GB RAM per slot, it went to swap and the jobs took days to complete -- too long to suit our requirements. So all our workers have 2GB RAM per core (slot) or more now.

Almudena Montiel Gonzalez              e-mail: almudena.montiel@xxxxxx
Dept. Theoretical Physics. Block 15.
Laboratory of High Energy Physics
Universidad Autonoma de Madrid.
Phone: 34 91 497 4541      Fax: 34 91 497 3936
James Watt 2, Cantoblanco, 28049 Madrid, Spain.