[gpfsug-discuss] GPFS 3.5 to 4.1 Upgrade Question

Aaron Knister aaron.s.knister at nasa.gov
Mon Dec 5 23:00:43 GMT 2016


Thanks Jan-Frode! If you don't mind sharing, over what period of time 
did you upgrade from 3.5 to 4.1 and roughly how many clients/servers do 
you have in your cluster?

-Aaron

On 12/5/16 5:52 PM, Jan-Frode Myklebust wrote:
> 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 <mailto: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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-- 
Aaron Knister
NASA Center for Climate Simulation (Code 606.2)
Goddard Space Flight Center
(301) 286-2776



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