> let's think about what a hpc cluster is for.
> Second, one should always ask the question where security is to be
> applied,
+1
You have to assess your environment and weigh up the benefits of uptime
vs security. Sometimes the security that is fixed in a new kernel is
inconsequential in your environment; sometimes the external security on
your network is such that the attack vector is tiny. You make a
judgement based on your needs.
>
>
> The physicists and mathematicians who count there need high durations.
Yes. I too run HPC clusters and I have had uptimes of over 1000 days -
clusters that are turned on when they are delivered and turned off when
they are obsolete. It is crucial for long running calculations that you
have a stable OS - you have never seen wrath like a computational
scientist whose 200 day calculation has just failed because you needed
to reboot the node it was running on.
>
> My decision much on Centos because:
>
> - free
> - Maintaining until the year 2024,
> longer than the cluster will live.
>
And stability ...
P.
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