From: =?iso-8859-1?Q?Ragnar_Kj=F8rstad?= Subject: Re: speed for NFS Date: Tue, 27 Aug 2002 11:30:05 +0200 Sender: nfs-admin@lists.sourceforge.net Message-ID: <20020827113005.A6228@vestdata.no> References: <3D6B2588.938F375E@fz-juelich.de> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Cc: nfs@lists.sourceforge.net Return-path: Received: from stine.vestdata.no ([195.204.68.10]) by usw-sf-list1.sourceforge.net with esmtp (Exim 3.31-VA-mm2 #1 (Debian)) id 17jcfv-0003uM-00 for ; Tue, 27 Aug 2002 02:30:16 -0700 To: Reimar Bauer In-Reply-To: <3D6B2588.938F375E@fz-juelich.de>; from r.bauer@fz-juelich.de on Tue, Aug 27, 2002 at 09:08:56AM +0200 Errors-To: nfs-admin@lists.sourceforge.net List-Help: List-Post: List-Subscribe: , List-Id: Discussion of NFS under Linux development, interoperability, and testing. List-Unsubscribe: , List-Archive: On Tue, Aug 27, 2002 at 09:08:56AM +0200, Reimar Bauer wrote: > Dear all, >=20 > in the next few years we will have much amount of > data something about 70 - 100 TByte. >=20 > At the moment with our configuration nfs speed is=20 > quite less against the network speed. > I believe this could be extended and this is necessary. >=20 > The max transfer rate we have is about 3MByte/sec. >=20 > Is there a possibility to increase this to 30MByte/sec. > Is this relalistic?=20 > Where can I get a description about this?=20 Yes, 30MB/s is realistic for nfs (sequantial access) - on our RAIDs we are able to do approxemately 50-60 MB/s over NFS (gigabit ethernet). You first need to make sure your local access is fast enough. For nfs-access to reach 30MB/s local access must be significantly higher, as there is some overhead in NFS. (Our RAIDs do approxemately 100-120 MB/s locally). Increasing readahead setting might help for reads. For configuring NFS I would start with making sure you're using NFS v3. Next, enable jumbo-frames (if you do large transfers over gigabit ethernet) and increase buffer-sizes. --=20 Ragnar Kj=F8rstad Big Storage ------------------------------------------------------- This sf.net email is sponsored by: OSDN - Tired of that same old cell phone? Get a new here for FREE! https://www.inphonic.com/r.asp?r=sourceforge1&refcode1=vs3390 _______________________________________________ NFS maillist - NFS@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nfs