From owner-freebsd-net Tue Apr 30 17:13:29 2002 Delivered-To: freebsd-net@freebsd.org Received: from bg.sics.se (uofa-dsl-nen-23.dakotacom.net [150.135.176.23]) by hub.freebsd.org (Postfix) with ESMTP id A88F937B405; Tue, 30 Apr 2002 17:13:20 -0700 (PDT) Received: (from bg@localhost) by bg.sics.se (8.11.6/8.11.6) id g3R17GX08156; Fri, 26 Apr 2002 18:07:16 -0700 (MST) (envelope-from bg) To: Brian Candler Cc: freebsd-fs@FreeBSD.ORG, freebsd-net@FreeBSD.ORG Subject: Re: NFS clearing attribute cache in nfs_open References: <20020426181535.B2748@linnet.org> From: Bjoern Groenvall Date: 26 Apr 2002 18:07:15 -0700 In-Reply-To: Brian Candler's message of "Fri, 26 Apr 2002 18:15:35 +0100" Message-ID: Lines: 23 X-Mailer: Gnus v5.7/Emacs 20.6 Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org SunOS 4 used to have a NFS mount mount option nocto (no close to open consistency checking) that would suppress getting fresh attributes when opening a file. IMHO it is ok to enable this option on filesystems that never change (or atleast rarely). I always used it when mounting /usr on diskless systems. It put less load on the server and also eliminated some delays. One may also safely enable this option on filesystems that are accesed from only one host at a time. It all boils down to if there is no writing or sharing, then, there can be no inconsistencies if nocto is enabled. Hope this helps, Björn -- _ _ ,_______________. Bjorn Gronvall (Björn Grönvall) /_______________/| Swedish Institute of Computer Science | || PO Box 1263, S-164 29 Kista, Sweden | Schroedingers || Email: bg@sics.se, Phone +46 -8 633 15 25 | Cat |/ Cellular +46 -70 768 06 35, Fax +46 -8 751 72 30 `---------------' To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message