[lustre-discuss] upgrading zfs back end file system lustre doesn't mount anymore

Kurt Strosahl strosahl at jlab.org
Tue Jun 9 08:10:21 PDT 2015

Good Morning,

   That seems to have done the trick.  For the benefit of everyone on this list using zfs... The issue I encountered with zfs is described here:

   To resolve it I had to download the newest zfs 0.6.3, recompile it, then recompile the lustre server rpms.  After I recompiled it and installed it on the test system (which had its zpools created, but never mounted) I was able to mount the osts on that system for the first time.  I can't quite declare victory just yet, as I still need to perform the process on a system with data.  But I'm fairly confident that the data will be safe.


----- Original Message -----
From: "Mohr" <rmohr at utk.edu>
To: "Kurt Strosahl" <strosahl at jlab.org>
Cc: lustre-discuss at lists.lustre.org
Sent: Monday, June 8, 2015 4:31:38 PM
Subject: Re: [lustre-discuss] upgrading zfs back end file system lustre doesn't	mount anymore

> On Jun 8, 2015, at 4:18 PM, Kurt Strosahl <strosahl at jlab.org> wrote:
> I reinstalled the original lustre modules, which were the stock lustre rpms I downloaded from intel.
> I guess then I lucked out and used the same version of zfs that the the rpms were compiled against the first time.

While I have never tried what you are describing, I am just assuming that changing the ZFS version will require a rebuild of Lustre.  The error messages you reported reminded me of similar errors I have seen on a couple of occasions where OFED was upgraded on a system, but Lustre was not rebuilt against the new version.

Rick Mohr
Senior HPC System Administrator
National Institute for Computational Sciences

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