[gpfsug-discuss] Using VMs as quorum / admin nodes in a GPFS infiniband cluster

Jim Doherty jjdoherty at yahoo.com
Mon Jun 7 14:28:51 BST 2021

I have seen people do this to move manager node traffic off of the NSD servers,  it is one way to help scale the cluster as the manager RPC traffic doesn't need to contend with the NSD servers for bandwidth.     If you want the nodes to be able to participate in disk maintenance  (mmfsck,    mmrestripefs)  make sure they have enough pagepool  as a small pagepool could impact the performance of these operations.  
Jim Doherty     On Monday, June 7, 2021, 08:55:49 AM EDT, Leonardo Sala <leonardo.sala at psi.ch> wrote:  
we do have multiple bare-metal GPFS clusters with infiniband fabric, and I am actually considering adding some VMs in the mix, to perform admin tasks (so that the bare metal servers do not need passwordless ssh keys) and quorum nodes. Has anybody tried this? What could be the drawbacks / issues at GPFS level?
Thanks a lot for the insights!
Paul Scherrer Institut
Dr. Leonardo Sala
Group Leader High Performance Computing
Deputy Section Head Science IT
Science IT
Forschungstrasse 111
5232 Villigen PSI

Phone: +41 56 310 3369
leonardo.sala at psi.ch
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