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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