Date: Mon, 29 Jun 2015 15:00:04 +0200 From: Carsten Aulbert <Carsten.Aulbert@aei.mpg.de> To: Rick Macklem <rmacklem@uoguelph.ca>, =?UTF-8?B?R2Vycml0IEvDvGhu?= <gerrit.kuehn@aei.mpg.de> Cc: Scott Larson <stl@wiredrive.com>, freebsd-net@freebsd.org Subject: Re: NFS on 10G interface terribly slow Message-ID: <55914154.9000401@aei.mpg.de> In-Reply-To: <1467277373.898391.1435580412070.JavaMail.zimbra@uoguelph.ca> References: <20150625145238.12cf9da3b368ef0b9a30f193@aei.mpg.de> <CAFt8naF7xmZW8bgVrhrL=CaPXiVURqDLsNN5-NHDg=hiv-Qmtw@mail.gmail.com> <1629011632.413406.1435365728977.JavaMail.zimbra@uoguelph.ca> <20150629091958.af9720d478a8903ab28adc1d@aei.mpg.de> <1467277373.898391.1435580412070.JavaMail.zimbra@uoguelph.ca>
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Hi Rick On 06/29/2015 02:20 PM, Rick Macklem wrote: > If the Solaris server is using ZFS, setting sync=disabled might help w.r.t. > write performance. It is, however, somewhat dangerous w.r.t. loss of recently > written data when the server crashes. (Server has told client data is safely > on stable storage so client will not re-write the block(s) although data wasn't > on stable storage and is lost.) > (I'm not a ZFS guy, so I can't suggest more w.r.t. ZFS.) > The system on the other side uses SAM/QFS, i.e. there is no such option for the file system per se (only the file system metadata is in a zvol thus not a full featured zfs). In parallel we are working also with Oracle to see where there may be a matching knob to turn as we see about the same performance issues from a Linux host (NFS client, Debian Jessie) with a Mellanox Technologies MT27500 Family [ConnectX-3] controller. Cheers Carsten -- Dr. Carsten Aulbert, Atlas cluster administration Max Planck Institute for Gravitational Physics (Albert Einstein Institute) Callinstraße 38, 30167 Hannover, Germany Tel: +49 511 762 17185, Fax: +49 511 762 17193
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