[PVFS-users] guide for upgrading of pvfs

[kenix y]

Thanks for your reply,

When you say delete everything you meant .iodtab, /etc/iod.conf, 
/etc/pvfstab and?
Is the first way the safer method to do it?
And if I use the first way, something goes wrong, is there anyway I can go 
back to using the one I'm using now?

Thank you for your time.


>From: Rob Ross <rross at mcs.anl.gov>
>To: kenix y <justbeforeme at hotmail.com>
>CC: pvfs-users at beowulf-underground.org
>Subject: Re: [PVFS-users] guide for upgrading of pvfs
>Date: Mon, 26 Jul 2004 09:54:35 -0500 (CDT)
>
>Hi,
>
>There's no document per-se.
>
>If you have a backup of the data from the old volume, or you don't need
>the data, then the easiest thing to do is to (a) copy your old .iodtab,
>/etc/iod.conf, and /etc/pvfstab (if you have one), (b) delete everything,
>and (c) follow the installation instructions again, using the old .iodtab
>and iod.conf as examples.
>
>If you do need to keep the data that is on the volume, then you need to be
>a little more careful:
>- build the new pvfs and pvfs-kernel versions
>- unmount the file system on all clients, stop all the servers (mgr and 
>iods)
>- copy the new binaries into place, saving the old ones if you want
>   - clients get pvfsd and pvfs.o
>   - manager gets mgr
>   - I/O servers get iod
>- optionally test everything with a new file system, so you know it works
>   - create new .pvfsdir, .iodtab with mkmgrconf
>   - save old /etc/iod.conf, copy new one into place
>- assuming that worked, upgrade old file system
>   - keep original .iodtab, .pvfsdir, iod.conf files
>   - run migration program (in your case migrate-1.5.6-to-1.5.8, which is
>     latest released metadata version as of today)
>
>     This is run on the metadata server (where the mgr runs) with:
>
>       find /path/to/metadata/dir -type f -not -name .iodtab \
>         -not -name .pvfsdir -exec migrate-1.5.6-to-1.5.8 \{\} \;
>
>     with your root metadata directory (where you created the .iodtab
>     file) is substituted for "/path/to/metadata/dir".
>- restart servers, remount
>
>The only thing to keep in mind is that the migration program needs to be
>run or the mgr won't be able to interpret the old metadata.  Also, there
>is no migrate-1.5.8-to-1.5.6, so you can't go *back* after you've run that
>program, at least not without some C coding.
>
>Regards,
>
>Rob
>
>On Mon, 26 Jul 2004, kenix y wrote:
>
> > May I know if there is a guide somewhere for upgrading of pvfs?
> > I've tried to use the one for installation of pvfs but there was always
> > errors.
> > I'm currently using ver 1.5.6 and wish to upgrade to 1.6.3.
> > >From what I know I just need to kill mgr, iod and pvfsd before starting 
>the
> > upgrade by following the quick start, is that right?
> > Is there anything else that I am supposed to do?

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