[gpfsug-discuss] CES services on an existing GPFS cluster

[Jan-Frode Myklebust]

No, the first time you define it, I'm pretty sure can be done online. But
when changing it later, it will require the stopping the full cluster first.


-jf
man. 5. des. 2016 kl. 15.26 skrev Sander Kuusemets <sander.kuusemets at ut.ee>:

> 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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