Sander,
You do not have to take the cluster offline to create a CES shared root directory,
however once its created if you want to modify it yes you would need to schedule an outage.
Andrew Beattie
Software Defined Storage - IT Specialist
Phone: 614-2133-7927
E-mail: [email protected]
----- Original message -----
From: Sander Kuusemets <[email protected]>
Sent by: [email protected]
To: [email protected]
Cc:
Subject: [gpfsug-discuss] CES services on an existing GPFS cluster
Date: Tue, Dec 6, 2016 12:26 AM
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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