[gpfsug-discuss] GPFS 3.5 to 4.1 Upgrade Question

[Aaron Knister]

Thanks Steve, that was exactly the answer I was looking for.

On 12/6/16 8:20 AM, Steve Duersch wrote:
> You fit within the "short time". The purpose of this remark is to make
> it clear that this should not be a permanent stopping place.
> Getting all nodes up to the same version is safer and allows for the use
> of new features.
>
>
> Steve Duersch
> Spectrum Scale
> 845-433-7902
> IBM Poughkeepsie, New York
>
>
>
>
> gpfsug-discuss-bounces at spectrumscale.org wrote on 12/06/2016 02:25:18 AM:
>
>
>>
>>
>> ----------------------------------------------------------------------
>>
>> Message: 1
>> Date: Mon, 5 Dec 2016 16:31:55 -0500
>> From: Aaron Knister <aaron.s.knister at nasa.gov>
>> To: gpfsug main discussion list <gpfsug-discuss at spectrumscale.org>
>> Subject: [gpfsug-discuss] GPFS 3.5 to 4.1 Upgrade Question
>> Message-ID: <339e3bdb-b4cc-87af-a4a0-5b5b5a9f7269 at nasa.gov>
>> Content-Type: text/plain; charset="utf-8"; format=flowed
>>
>> 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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-- 
Aaron Knister
NASA Center for Climate Simulation (Code 606.2)
Goddard Space Flight Center
(301) 286-2776