From owner-freebsd-questions Wed Jun 12 19: 8:20 2002 Delivered-To: freebsd-questions@freebsd.org Received: from dan.emsphone.com (dan.emsphone.com [199.67.51.101]) by hub.freebsd.org (Postfix) with ESMTP id AC98937B404 for ; Wed, 12 Jun 2002 19:08:17 -0700 (PDT) Received: (from dan@localhost) by dan.emsphone.com (8.12.3/8.12.3) id g5D28G7w049622; Wed, 12 Jun 2002 21:08:16 -0500 (CDT) (envelope-from dan) Date: Wed, 12 Jun 2002 21:08:16 -0500 From: Dan Nelson To: BSD Freak Cc: FreeBSD Questions Subject: Re: Network RAID on FreeBSD Message-ID: <20020613020816.GA63459@dan.emsphone.com> References: <123a0fb123a261.123a261123a0fb@mbox.com.au> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <123a0fb123a261.123a261123a0fb@mbox.com.au> User-Agent: Mutt/1.3.99i X-OS: FreeBSD 5.0-CURRENT X-message-flag: Outlook Error Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG In the last episode (Jun 13), BSD Freak said: > Hi all, > > We have a server which is highly critical. Data loss or downtime on it > is not an option so we have a hardware RAID 1 and also a second "hot > host" (in another building) which replicates data from the main one > every 30 minutes (via rsync). However it is this 30 minute window that > concerns me because that leaves us open to 30 minutes of data loss. > > So basically what I'm asking is (without switching to Sun equipent) is > it possible to do some sort of network RAID where data is written to > both systems simultaneously? We need our system to carry on with no > data loss even if one of the servers should suffer a complete system > failure (ie be blown up or thrown out of the window)...... Only by doing it in software; i.e. using Mysql's replication feature to simultaneously update a remote database, or modifying your applications to update the remote system as part of their regular operation. -- Dan Nelson dnelson@allantgroup.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message