From owner-freebsd-hackers Fri Jul 27 6:45: 7 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 245BA37B401 for ; Fri, 27 Jul 2001 06:45:05 -0700 (PDT) (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 4C792137F26; Fri, 27 Jul 2001 09:45:04 -0400 (EDT) Received: (from dgilbert@localhost) by office.tor.velocet.net (8.11.4/8.9.3) id f6RDj4G52864; Fri, 27 Jul 2001 09:45:04 -0400 (EDT) (envelope-from dgilbert) From: David Gilbert MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <15201.28767.575077.832729@trooper.velocet.net> Date: Fri, 27 Jul 2001 09:45:03 -0400 To: Dima Dorfman Cc: David Gilbert , freebsd-hackers@freebsd.org Subject: Re: Wanted: swapped backed disk on a diskless machine In-Reply-To: <20010727134119.F11AE3E31@bazooka.unixfreak.org> References: <15201.24866.326855.142183@trooper.velocet.net> <20010727134119.F11AE3E31@bazooka.unixfreak.org> X-Mailer: VM 6.92 under 20.4 "Emerald" XEmacs Lucid Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG >>>>> "Dima" == Dima Dorfman writes: Dima> David Gilbert writes: >> I have somewhat of an interesting problem: I have applications that >> write arbitrarily large files (as much as 6 gig) and I find that >> the best performance for these disks is to use something like MFS. >> >> However, mfs has a maximum size of 512M. >> >> md appears to have a very small maximum size and only resides in >> core Dima> Only the `malloc' md type (as much as the name suggests Dima> otherwise, it can be configured not to use malloc as a backing Dima> store) has the limits I think you're referring to. Its `swap' Dima> backing may be what you need. However, support for that is only Dima> in -current, and there are no plans to MFC it since it isn't Dima> backwards-compatible with the md that's in -stable. That said, Dima> I have patches that backport -current's md to -stable; if Dima> anybody wants them, feel free to ask. Me Please! 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