[gpfsug-discuss] file system format version / software version compatibility matrix

[James Davis]

Dan,

A "new" GPFS should be able to mount and interact with file systems with
"old" versions. Specifically I do not believe you will have trouble getting
GPFS 3.5 to talk to an FS created on GPFS 3.3.0.2.

The "Concepts, planning, and install guide" provides information about
migrating to GPFS 4.1 from GPFS 3.2 or earlier; this would implies file
systems created at GPFS 3.2 being supported on GPFS 4.1, which is even more
compatibility than you are asking about. The section to which I refer is
titled "Migrating to GPFS 4.1 from GPFS 3.2 or earlier releases of GPFS".

Note that without running mmchfs -V {full|compat} you will not have access
to some of the newer GPFS features. See the section titled "Completing the
migration to a new level of GPFS", also in the concepts guide.

Hope this helps,

Jamie

Jamie Davis
GPFS Functional Verification Test (FVT)
jamiedavis at us.ibm.com



From:	Dan Foster <Dan.Foster at bristol.ac.uk>
To:	gpfsug main discussion list <gpfsug-discuss at gpfsug.org>
Date:	29-04-15 03:51 AM
Subject:	[gpfsug-discuss] file system format version / software version
            compatibility matrix
Sent by:	gpfsug-discuss-bounces at gpfsug.org



Hi All,

I'm trying to determine which versions of the GPFS file system format
are compatible with certain versions of the GPFS software.
Specifically in this instance I'm interested if file system format
v11.05 (from GPFS 3.3.0.2) is compatible with GPFS 3.5 .

The "File system format changes between versions of GPFS" [1] chapter
mentions format levels as old a v6, which infers that they are
compatible. But it would be useful to know for certain.

Thanks,
Dan.

[1]
http://www-01.ibm.com/support/knowledgecenter/SSFKCN_3.5.0/com.ibm.cluster.gpfs.v3r5.gpfs100.doc/bl1adm_fsmigissues.htm?lang=en

--
Dan Foster | Senior Storage Systems Administrator | IT Services
e: dan.foster at bristol.ac.uk | t:  0117 3941170 [x41170]
m: Advanced Computing Research Centre, University of Bristol,
    8-10 Berkeley Square, Bristol BS8 1HH
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