[Dunder-users] tornado/dunder: service stop on Tue May 27 0800 CEST

[Per Lundqvist]

On Tue May 27 0800 CEST, _all_ distributed filesystems on Dunder and 
Tornado (i.e. /home and /nobackup/*) will be taken offline for maintenance 
of the corresponding disk servers.

Since this also affects /home on both systems, everybody will have to be 
logged out while the corresponding disk server is being checked - we will 
prioritize /home though, so that you may log in as soon as possible.

The batch queuing system will be stopped during this - i.e. we will put a 
blocking reservation that prevents jobs to run at the time.

The amount of time for this is uncertain, an initial estimate is that we 
are done ~ 2000 on the same day.

Schedule Tue 27/5:
   0800 - stop begins, everybody will be logged out from dunder and
          tornado. The batch queuing system will be stopped.
   ...	- all distributed filesystems will be unmounted from all nodes
	  on Dunder and Tornado
   ...	- maintenance begins on all disk servers
   ...  - filesystems will be mounted again as soon as possible (/home
          prioritized)
   ...	- when /home is available you will be notified and be able to
          log in again
   ...	- when the rest of the filesystems on each respective
          filesystem are available you will be notified and the batch
          queuing system will start again.

/Per

-- 
Per Lundqvist

National Supercomputer Centre
Linköping University, Sweden

http://www.nsc.liu.se