From: Spencer Shepler Subject: Re: NFS mount option - noac forces sync even if async is sp ecified, and no warning is given Date: Wed, 5 Feb 2003 16:40:15 -0600 Sender: nfs-admin@lists.sourceforge.net Message-ID: <20030205224015.GA102862@dhcp-uaus08-128-228.sun.com> References: <6440EA1A6AA1D5118C6900902745938E07D552A3@black.eng.netapp.com> Reply-To: spencer.shepler@sun.com Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: "'Heflin, Roger A.'" , nfs@lists.sourceforge.net Return-path: Received: from pheriche.sun.com ([192.18.98.34]) by sc8-sf-list1.sourceforge.net with esmtp (Exim 3.31-VA-mm2 #1 (Debian)) id 18gYFZ-0000FC-00 for ; Wed, 05 Feb 2003 14:42:37 -0800 To: "Lever, Charles" In-Reply-To: <6440EA1A6AA1D5118C6900902745938E07D552A3@black.eng.netapp.com> 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 Wed, Lever, Charles wrote: > > > ah, but Solaris noac doesn't disable *data* caching. data is still > > > cached until the client detects the file has changed. *writes* are > > > no longer cached, but reads can hit the client's data cache as long > > > as the file doesn't change on the server. > > > > > Then their manpage is also wrong. On 2.6 (and 2.8) it says: > > noac Suppress data and attribute caching. > > > > It sounds very much like they kill all caching, but who knows > > what they actually do. > > for the record, here's what my man page says (Solaris 9): > > noac Suppress data and attribute caching. The data > caching that is suppressed is the write-behind. > The local page cache is still maintained, but > data copied into it is immediately written to > the server. > > there's a section further down in the man page called "File > Attributes" that explains in detail how attribute caching > works and what noac does, which i think also appears in the > Solaris 8 version of this page. Correct. The additional explanation is contained in the Solaris 8 man page. -- Spencer ------------------------------------------------------- This SF.NET email is sponsored by: SourceForge Enterprise Edition + IBM + LinuxWorld = Something 2 See! http://www.vasoftware.com _______________________________________________ NFS maillist - NFS@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nfs