nfs export problems
phornecker at googlemail.com
Sun Oct 17 11:58:04 UTC 2010
2010/10/16 Waleed Harbi <waleed.harbi at gmail.com>
> ***Is the kernel & nfsd version releases packages are same on all servers?
the kernel versions which are used are: 2.6.32-23-server and
2.6.32-25-server (this is the server with the errors).
the nfs releases are the same on the different servers. they all use the
recent lucid nfs-package.
> Best Wishes,
> Waleed Harbi
2010/10/16 kristau <kristau at gmail.com>
> On Fri, Oct 15, 2010 at 1:41 AM, Patrick Hornecker
> <phornecker at googlemail.com> wrote:
> > hi,
> > im using nfs version 3 to export data of several raids over the network.
> > raids are attached to different server which are running ubuntu 10.04.
> > exported raids are using xfs as filesystem.
> > On one server occurs a random freeze of the nfsd. if this happens, the
> > exported raid is not accessable over the network anymore. if a user wants
> > open the directory with his shell, the shell freezes.
> > i haven't found any known bugs or problems, which fit to this problem. do
> > you have any suggestions oder maybe a known fix of this problem?
> > thanks in advance and regards,
> > patrick
> If all of the hosts are the same, but only one is acting up in this
> manner, I would suspect a hardware or driver issue on the host having
> the problem. Beyond that, try isolating the differences between the
> malfunctioning host and the others.
> If they are all using the same hardware, this should be easy. If the
> hardware is different, then you may try replacing the differing
> hardware. For example, if a working host uses a specific type of RAID
> controller which is different from the host with the issue, try
> changing the malfunctioning host's RAID controller to that brand and
the hardware for all the server is nearly the same (just some minor
differences, which shouldn't be important). what i've done so far: i've
changed the attached RAID and the error still occurs. i have also changed
the RAID controller...with no effect on the error.
> If all the hardware is the same, try swapping RAID controllers between
> systems to see if the problem follows the RAID controller or stays
> with the system. Make sure the drivers are the same between the two
i have done that, but the problem seems not to follow....the problem is the
server, as far as i know by now.
> Again, if this were a general bug in Ubuntu I would expect the problem
> to be the same on all your systems. Since it is only one system acting
> up, I strongly suspect a hardware (most likely), driver (likely), or
> configuration (least likely) issue on that one system.
> Happy hunting and good luck!
> by now i have tried another fix, which i found for nfs freezes. most of the
files written on the RAID are big ( > 10 gb), so i extended the
swap-partition of the server. i recently read that this could help when the
nfs is freezing. by now nothing has freezed :)
thanks for your answers and regards,
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