<html><body><p>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. <br>Getting all nodes up to the same version is safer and allows for the use of new features. <br><br><br>Steve Duersch<br>Spectrum Scale<br>845-433-7902<br>IBM Poughkeepsie, New York<br><br><br><br><br><tt>gpfsug-discuss-bounces@spectrumscale.org wrote on 12/06/2016 02:25:18 AM:<br><br><br>> <br>> <br>> ----------------------------------------------------------------------<br>> <br>> Message: 1<br>> Date: Mon, 5 Dec 2016 16:31:55 -0500<br>> From: Aaron Knister <aaron.s.knister@nasa.gov><br>> To: gpfsug main discussion list <gpfsug-discuss@spectrumscale.org><br>> Subject: [gpfsug-discuss] GPFS 3.5 to 4.1 Upgrade Question<br>> Message-ID: <339e3bdb-b4cc-87af-a4a0-5b5b5a9f7269@nasa.gov><br>> Content-Type: text/plain; charset="utf-8"; format=flowed<br>> <br>> Hi Everyone,<br>> <br>> In the GPFS documentation <br>> (<a href="http://www.ibm.com/support/knowledgecenter/SSFKCN_4.1.0/">http://www.ibm.com/support/knowledgecenter/SSFKCN_4.1.0/</a><br>> com.ibm.cluster.gpfs.v4r1.gpfs300.doc/bl1ins_migratl.htm) <br>> it has this to say about the duration of an upgrade from 3.5 to 4.1:<br>> <br>> > Rolling upgrades allow you to install new GPFS code one node at a <br>> time without shutting down GPFS<br>> > on other nodes. However, you must upgrade all nodes within a short<br>> time. The time dependency exists<br>> >because some GPFS 4.1 features become available on each node as soon as <br>> the node is upgraded, while<br>> >other features will not become available until you upgrade all <br>> participating nodes.<br>> <br>> Does anyone have a feel for what "a short time" means? I'm looking to <br>> upgrade from 3.5.0.31 to 4.1.1.10 in a rolling fashion but given the <br>> size of our system it might take several weeks to complete. Seeing this <br>> language concerns me that after some period of time something bad is <br>> going to happen, but I don't know what that period of time is.<br>> <br>> Also, if anyone has done a rolling 3.5 to 4.1 upgrade and has any <br>> anecdotes they'd like to share, I would like to hear them.<br>> <br>> Thanks!<br>> <br>> -Aaron<br>> <br>> -- <br>> Aaron Knister<br>> NASA Center for Climate Simulation (Code 606.2)<br>> Goddard Space Flight Center<br>> (301) 286-2776<br>> <br>> <br><br></tt><BR>
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