From owner-freebsd-hackers Fri Jul 27 6:41:23 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from bazooka.unixfreak.org (bazooka.unixfreak.org [63.198.170.138]) by hub.freebsd.org (Postfix) with ESMTP id 7D30237B403 for ; Fri, 27 Jul 2001 06:41:20 -0700 (PDT) (envelope-from dima@unixfreak.org) Received: by bazooka.unixfreak.org (Postfix, from userid 1000) id F11AE3E31; Fri, 27 Jul 2001 06:41:19 -0700 (PDT) Received: from bazooka.unixfreak.org (localhost [127.0.0.1]) by bazooka.unixfreak.org (Postfix) with ESMTP id E4DA73C12D; Fri, 27 Jul 2001 06:41:19 -0700 (PDT) To: David Gilbert Cc: freebsd-hackers@freebsd.org Subject: Re: Wanted: swapped backed disk on a diskless machine In-Reply-To: <15201.24866.326855.142183@trooper.velocet.net>; from dgilbert@velocet.ca on "Fri, 27 Jul 2001 08:40:02 -0400" Date: Fri, 27 Jul 2001 06:41:14 -0700 From: Dima Dorfman Message-Id: <20010727134119.F11AE3E31@bazooka.unixfreak.org> 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 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 Only the `malloc' md type (as much as the name suggests otherwise, it can be configured not to use malloc as a backing store) has the limits I think you're referring to. Its `swap' backing may be what you need. However, support for that is only in -current, and there are no plans to MFC it since it isn't backwards-compatible with the md that's in -stable. That said, I have patches that backport -current's md to -stable; if anybody wants them, feel free to ask. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message