From owner-freebsd-hackers Sat Feb 24 20:53: 9 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from sabre.velocet.net (sabre.velocet.net [198.96.118.66]) by hub.freebsd.org (Postfix) with ESMTP id D9A6E37B491 for ; Sat, 24 Feb 2001 20:53:06 -0800 (PST) (envelope-from dgilbert@office.tor.velocet.net) Received: from office.tor.velocet.net (trooper.velocet.net [204.138.45.2]) by sabre.velocet.net (Postfix) with ESMTP id D417B137F0C; Sat, 24 Feb 2001 23:53:05 -0500 (EST) Received: (from dgilbert@localhost) by office.tor.velocet.net (8.11.2/8.9.3) id f1P4r4a63291; Sat, 24 Feb 2001 23:53:04 -0500 (EST) (envelope-from dgilbert) From: David Gilbert MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <15000.36784.766360.340198@trooper.velocet.net> Date: Sat, 24 Feb 2001 23:53:04 -0500 (EST) To: Bernd Walter Cc: David Gilbert , freebsd-hackers@FreeBSD.ORG Subject: Re: Large MFS on NFS-swap? In-Reply-To: <20010225042933.A508@cicely5.cicely.de> References: <15000.8884.6165.759008@trooper.velocet.net> <20010225042933.A508@cicely5.cicely.de> X-Mailer: VM 6.75 under 20.4 "Emerald" XEmacs Lucid Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG >>>>> "Bernd" == Bernd Walter writes: Bernd> You have to raise MAXDSIZE and DFLDSIZ in your kernel config. Bernd> You may also want to try MD instead of MFS. Well... I was reading about md and the man page seemed to imply that it was _very_ dependant on what malloc(9) could do ... and it hinted (or it may be me drawing this conclusion) that md was limited to the size of pysical memory. In this particular case, 99% of the time, the program is writing files that fit into memory. 1% of the time, it writes huge files ... and I'm aware that the mfs filesystem is probably going to perform worse when you write to MFS and then swap ... ... but over all, the other 99% of the time should be a _big_ win. Dave. -- ============================================================================ |David Gilbert, Velocet Communications. | Two things can only be | |Mail: dgilbert@velocet.net | equal if and only if they | |http://www.velocet.net/~dgilbert | are precisely opposite. | =========================================================GLO================ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message