[gpfsug-discuss] GPFS 3.5 to 4.1 Upgrade Question

Jan-Frode Myklebust janfrode at tanso.net
Mon Dec 5 22:52:58 GMT 2016


I read it as "do your best". I doubt there can be problems that shows up
after 3 weeks, that wouldn't also be triggerable after 1 day.


-jf

man. 5. des. 2016 kl. 22.32 skrev Aaron Knister <aaron.s.knister at nasa.gov>:

> Hi Everyone,
>
> In the GPFS documentation
> (
> http://www.ibm.com/support/knowledgecenter/SSFKCN_4.1.0/com.ibm.cluster.gpfs.v4r1.gpfs300.doc/bl1ins_migratl.htm
> )
> it has this to say about the duration of an upgrade from 3.5 to 4.1:
>
> > Rolling upgrades allow you to install new GPFS code one node at a time
> without shutting down GPFS
> > on other nodes. However, you must upgrade all nodes within a short time.
> The time dependency exists
> >because some GPFS 4.1 features become available on each node as soon as
> the node is upgraded, while
> >other features will not become available until you upgrade all
> participating nodes.
>
> Does anyone have a feel for what "a short time" means? I'm looking to
> upgrade from 3.5.0.31 to 4.1.1.10 in a rolling fashion but given the
> size of our system it might take several weeks to complete. Seeing this
> language concerns me that after some period of time something bad is
> going to happen, but I don't know what that period of time is.
>
> Also, if anyone has done a rolling 3.5 to 4.1 upgrade and has any
> anecdotes they'd like to share, I would like to hear them.
>
> Thanks!
>
> -Aaron
>
> --
> Aaron Knister
> NASA Center for Climate Simulation (Code 606.2)
> Goddard Space Flight Center
> (301) 286-2776
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>
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