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
[email protected] wrote on 12/06/2016 02:25:18 AM:
----------------------------------------------------------------------
Message: 1
Date: Mon, 5 Dec 2016 16:31:55 -0500
From: Aaron Knister <[email protected]>
To: gpfsug main discussion list <[email protected]>
Subject: [gpfsug-discuss] GPFS 3.5 to 4.1 Upgrade Question
Message-ID: <[email protected]>
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
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