From: "J. Bruce Fields" Subject: Re: async vs. sync Date: Tue, 23 Nov 2004 09:57:18 -0500 Message-ID: <20041123145718.GA15378@fieldses.org> References: <41A25DCB.6020700@int-evry.fr> <41A25FA3.6060000@int-evry.fr> <1101162043.11196.88.camel@lade.trondhjem.org> <41A26EF1.8040404@int-evry.fr> <41A307FF.3080300@int-evry.fr> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Trond Myklebust , Roger Heflin , Olaf Kirch , nfs@lists.sourceforge.net, mci-unix@int-evry.fr Return-path: Received: from sc8-sf-mx2-b.sourceforge.net ([10.3.1.12] helo=sc8-sf-mx2.sourceforge.net) by sc8-sf-list2.sourceforge.net with esmtp (Exim 4.30) id 1CWc6e-0003kF-B7 for nfs@lists.sourceforge.net; Tue, 23 Nov 2004 06:57:24 -0800 Received: from dsl093-002-214.det1.dsl.speakeasy.net ([66.93.2.214] helo=pickle.fieldses.org) by sc8-sf-mx2.sourceforge.net with esmtp (TLSv1:RC4-SHA:128) (Exim 4.41) id 1CWc6d-00063z-6r for nfs@lists.sourceforge.net; Tue, 23 Nov 2004 06:57:24 -0800 To: jehan procaccia In-Reply-To: <41A307FF.3080300@int-evry.fr> Sender: nfs-admin@lists.sourceforge.net Errors-To: nfs-admin@lists.sourceforge.net List-Unsubscribe: , List-Id: Discussion of NFS under Linux development, interoperability, and testing. List-Post: List-Help: List-Subscribe: , List-Archive: On Tue, Nov 23, 2004 at 10:50:55AM +0100, jehan procaccia wrote: > This is what I expect in term of performances . I will continue my > requests on the DEll/EMC hotline , but maybe the security of that AX100 > storage Processor (raid5, spare disk, double fiber attachement, UPS) > allows me to use async export mode in such a case ? No. The problem with the async export option is that it allows the server to tell the client that data is safely committed to disk when it hasn't actually been. So the risk is that the nfs server will fail while valuable data is still sitting in its memory. It's the server itself that's the weak point, not the storage. --Bruce Fields ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://productguide.itmanagersjournal.com/ _______________________________________________ NFS maillist - NFS@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nfs