Topic
3 replies Latest Post - ‏2013-01-04T19:04:41Z by FelipeKnop
dmr1
dmr1
8 Posts
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Pinned topic mixed 3.4.0.12 and 3.5.0.7 clients with 3.4.0.12 servers?

‏2013-01-03T21:00:50Z |
Hi all,

We're planning on migrating our clients from the 3.4 series to the 3.5 series, but for various reasons too irritating to go into, we'd like to wait a bit before moving the servers to the new release series.

We know (through a previous PMR) that we need to set scatterBuffers=no for the 3.5 clients if they'll be dealing with 3.4 servers, but is anyone aware of any other interoperability issues that might come up? I've been through the changelogs pretty thoroughly, but they're dense, so it's entirely likely I've missed something. Here's what I've seen that appears relevant:

3.5.0.7:
* Fix an incompatibility issue between GPFS 3.5 and GPFS 3.4. When both versions coexist, nodes running GPFS 3.4 can experience assert like "logAssertFailed: this == newDesc sgdescio.C".
3.5.0.4:
* Fix an issue in a mixed version cluster, where a node running running GPFS 3.4 or older failing in a small window during mount could cause spurious log recovery errors.
* Fix assert "MSGTYPE == 34" that occurs in pre and post-3.4.0.7 mixed multicluster environment.
3.5.0.2:
* Fixed the backward compatibility error in reading data across node on different versions. This is needed if you are upgrading from 3.4.0.6 or lower version number to 3.4.0.12 or higher GPFS version.

I don't see anything that looks relevant in the 3.4 changelogs.

To me, this would seem to indicate that--of course barring undiscovered bugs--if I run clients with 3.5.0.7, it should be fine? Anyone have any experience with this?

Thanks!
Updated on 2013-01-04T19:04:41Z at 2013-01-04T19:04:41Z by FelipeKnop
  • FelipeKnop
    FelipeKnop
    18 Posts
    ACCEPTED ANSWER

    Re: mixed 3.4.0.12 and 3.5.0.7 clients with 3.4.0.12 servers?

    ‏2013-01-04T02:16:06Z  in response to dmr1
    There are no known problems that would prevent 3.5.0.7 clients from working with 3.4.0.12 servers.

    Felipe
    • dmr1
      dmr1
      8 Posts
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      Re: mixed 3.4.0.12 and 3.5.0.7 clients with 3.4.0.12 servers?

      ‏2013-01-04T17:43:41Z  in response to FelipeKnop
      And also no known problems that would prevent a mix of 3.4.0.12 and 3.5.0.7 clients?

      Thanks!
      • FelipeKnop
        FelipeKnop
        18 Posts
        ACCEPTED ANSWER

        Re: mixed 3.4.0.12 and 3.5.0.7 clients with 3.4.0.12 servers?

        ‏2013-01-04T19:04:41Z  in response to dmr1
        No known problems.

        Felipe