[gridengine users] OGS: drop-in replacement for sge6.2u5
w.hay at ucl.ac.uk
Thu Apr 26 10:04:42 UTC 2012
On 26 April 2012 10:18, admin iqtc <iqtcub at gmail.com> wrote:
> Hi all,
> on the OGS webpage, it says:
>> Grid Engine 2011.11 is compatible with Sun Grid Engine 6.2u5. You can even
>> run Grid Engine 2011.11 on a subset of nodes while the rest of the cluster
>> runs the older 6.2u5 release - ie. as a drop-in replacement for 6.2u5.
> So, how is that achieved? I've searched on the mailing list and google but i
> can't find anything regarding that. Is the key on the init script or
There are instructions for running grid engine with reduced or minimal
usage of NFS in order to support scaling to many nodes or just because
you don't trust NFS. It's probably easiest to do in that
configuration. Just replace the whole Grid engine install on
whichever nodes you want to upgrade.
If you use the default configuration which shares a lot then you might
be able to play tricks with symlinks to allow a live upgrade of the
system without a prolonged whole cluster outage.
Do a new install in parallel making the directory for each cell a
symlink to the corresponding directory in the old install. You should
hopefully then be able to upgrade each node by
softstoping the relevant daemons and then starting them with SGE_ROOT
pointed at the new install. Apart from a blip when you restart the
qmaster this should be invisible to the users.
Never tried it myself but it should work.
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