ZFS over NFS issue with linux clients

[Alexey Tyurikov]

Yes, I can confirm, the issue doesn't exist on FreeBSD 9.1. Affected
releases: 8.3, 9.0

@Kristof: thank you for the answer! do you use 9.1 in production?

Best regards
Alexey

2012/10/18 Kristof Provost <kristof at sigsegv.be>

> On 2012-10-18 10:50:25 (+0200), Alexey Tyurikov <alexey.tyurikov at gmail.com>
> wrote:
> > I'm looking for people using FreeBSD 9.0 amd64 ZFS over NFS (v3 and v4)
> > with Linux clients. My clients (last CentOS6 and Debian6) don't use cache
> > for files lying on ZFS over NFS. Tested:
> >
> >  $ grep something /nfs_zfs/file-100MB # network activity, client read the
> > file over NFS (slow)
> >  $ grep something /nfs_zfs/file-100MB # network activity, client read the
> > file over NFS once again (slow)
> >
> I'm unable to reproduce this behaviour with a Debian 6.0 client (ARM,
> because my openrd is the only client I can get to at the moment). That's
> a 2.6.32-5-kirkwood kernel.
>
> The server is FreeBSD 9.1-PRERELEASE #91 r241441 (amd64). I can't
> easily compare to UFS, because the server is ZFS only.
>
> I see network activity on the first read, but only very little (a single
> getattr + reply in fact) on the second read.
>
> Regards,
> Kristof
>
>


-- 
Alexey Tyurikov