[gpfsug-discuss] CES services on an existing GPFS cluster
Sander Kuusemets
sander.kuusemets at ut.ee
Mon Dec 5 14:26:21 GMT 2016
Hello,
I have been thinking about setting up a CES cluster on my GPFS custer
for easier data distribution. The cluster is quite an old one - since
3.4, but we have been doing rolling upgrades on it. 4.2.0 now, ~200
nodes Centos 7, Infiniband interconnected.
The problem is this little line in Spectrum Scale documentation:
> The CES shared root directory cannot be changed when the cluster is up
> and running. If you want to modify the shared root configuration, you
> must bring the entire cluster down.
Does this mean that even the first time I'm setting CES up, I have to
pull down the whole cluster? I would understand this level of service
disruption when I already had set the directory before and now I was
changing it, but on an initial setup it's quite an inconvenience. Maybe
there's a less painful way for this?
Best regards,
--
Sander Kuusemets
University of Tartu, High Performance Computing
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