From owner-freebsd-hackers Sun Mar 8 20:26:12 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id UAA20433 for freebsd-hackers-outgoing; Sun, 8 Mar 1998 20:26:12 -0800 (PST) (envelope-from owner-freebsd-hackers@FreeBSD.ORG) Received: from rover.village.org (rover.village.org [204.144.255.49]) by hub.freebsd.org (8.8.8/8.8.8) with SMTP id UAA20376 for ; Sun, 8 Mar 1998 20:26:01 -0800 (PST) (envelope-from imp@village.org) Received: from pencil-box.village.org [10.0.0.22] by rover.village.org with esmtp (Exim 1.71 #1) id 0yBu7Q-0005JU-00; Sun, 8 Mar 1998 21:24:53 -0700 Received: from pencil-box.village.org (localhost [127.0.0.1]) by pencil-box.village.org (8.8.8/8.8.3) with ESMTP id JAA01624; Fri, 6 Mar 1998 09:03:15 -0700 (MST) Message-Id: <199803061603.JAA01624@pencil-box.village.org> To: leifn@image.dk (Leif Neland) Subject: Re: SCSI Bus redundancy... Cc: freebsd-hackers@FreeBSD.ORG In-reply-to: Your message of "04 Mar 1998 09:02:00 +0100." <4bf_9803042116@swimsuit.swimsuit.roskildebc.dk> References: <4bf_9803042116@swimsuit.swimsuit.roskildebc.dk> Date: Fri, 06 Mar 1998 09:03:14 -0700 From: "M. Warner Losh" Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG In message <4bf_9803042116@swimsuit.swimsuit.roskildebc.dk> Leif Neland writes: : A company I know has the production database in one location, and a : backup database in another. The backup-database operates in : "incremental restore" mode (for lack of a better word), and receives : the redo-logs from the production database over a dedicated network : link. So the backup-database is only a few minutes behind at most. The company that I work for is producing a product called DataStar (what a name) that operates at the disk block level to accomplish the same thing. We've found that a properly configured system is never more than about a second behind in its updates. Any FreeBSD interest in a disk mirroring product that mirrors data to a remote location in realtime? I'd love to do a FreeBSD port :-). Warner To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message