[Bi-users] DONE: Reboot of Bi login nodes on Monday October 31 at 17-18 CEST

[Kent Engström]

The downtime described below has now been done (and it was 17-18 CET,
not CEST :-)

kent at nsc.liu.se (Kent Engström) writes:
> Dear Bi Users,
>
> last week we had to reboot things to install a kernel patched for
> the critical "Dirty COW" Linux kernel vulnerability.
>
> Alas, the patched kernel we used was not perfect. While it worked in
> general and was not vulnerable, it caused problems with debuggers
> (not working, hanging forever).
>
> We now have an official kernel from CentOS that does not have this
> problem. It has been rolling out to compute nodes since yesterday, but
> we still have to schedule a downtime to update the login nodes and the
> system server.
>
> After discussions with Michael Kolax (Anders Höglund not available) we
> have decided to try to get this done in a 17-18 CEST slot on Monday
> October 31.
>
> As usual, login node processes and interactive jobs will die, but batch
> jobs should survive.

-- 
Kent Engström, National Supercomputer Centre
kent at nsc.liu.se, +46 13 28 4444