Date: Wed, 4 Apr 2018 21:04:21 +0100 From: Kaya Saman <kayasaman@gmail.com> To: =?UTF-8?Q?Karli_Sj=c3=b6berg?= <karli@inparadise.se>, freebsd-fs@freebsd.org, Mike Tancsa <mike@sentex.net>, Guido Falsi <mad@madpilot.net> Subject: Re: Linux NFS client and FreeBSD server strangeness Message-ID: <4da08f8b-2c28-cf18-77d2-6b498004d435@gmail.com> In-Reply-To: <C3024CF7-3928-4DBF-9855-82451BDACE01@inparadise.se> References: <369fab06-6213-ba87-cc66-c9829e8a76a0@sentex.net> <2019ee5a-5b2b-853d-98c5-a365940d93b5@madpilot.net> <bc78744a-c668-cbbd-f6fd-0064e7f0dc46@sentex.net> <C3024CF7-3928-4DBF-9855-82451BDACE01@inparadise.se>
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I also see this behavior between Linux and FBSD. Yep my server does run ZFS however, when using FreeBSD as a client I am able to use NFSv4 without any problem however, with Linux I get many timeouts so I switched to v3 which gives smoother performance at least on the read side. It is however, not possible to use the FBSD machine as an nfs /home directory as the Linux client will lock up and wait for a long time while certain files from Window Managers etc.... get written/read. For this reason I switched over to using iscsi and a ZFS udev. I think I posted a similar topic ages ago but got no response. It would be interesting to see the cause for this. I have a hunch it could be something to do with the nfs implementation of Linux but it is just pure conjecture on my side. Regards, Kaya On 04/04/18 20:44, Karli Sjöberg via freebsd-fs wrote: > > Mike Tancsa <mike@sentex.net> skrev: (4 april 2018 21:24:59 CEST) >> On 4/4/2018 3:04 PM, Guido Falsi wrote: >>> https://wiki.freebsd.org/ZFSTuningGuide >>> >>> in the NFS tuning section. >>> >>> >>> If you're not using ZFS I don't have an idea right away what your >>> problem could be. >> Thanks, same sort of bursty traffic patterns with a ufs filesystem. I >> just tried with a spare disk I made into a UFS2 partition and exported >> it to the linux client. >> >> Also no difference if I disable sync for the underlying file system >> when >> using zfs. > Darn, would have been my bet as well:) > > Although I understand it might be difficult for you, it would be interresting to know if a FreeBSD client exhibits the same behaviour. It may be a client problem instead of the server? > > /K > >> >> >> ---Mike
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