Date: Sun, 9 Jun 2002 16:31:16 +0800 From: S H A N <shanali@singnet.com.sg> To: "FreeBSD Questions" <freebsd-questions@FreeBSD.ORG> Subject: Re: Network RAID on FreeBSD - is it possible? Message-ID: <20020609083116.GA13492@singapura.singnet.com.sg> In-Reply-To: <GPEOJKGHAMKFIOMAGMDIEEKKMCAA.deepak@ai.net> References: <20020609031742.GA19660@singapura.singnet.com.sg> <GPEOJKGHAMKFIOMAGMDIEEKKMCAA.deepak@ai.net>
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hi, there is a forth option as well... every change to a filesystem gets acknowledged by the kernel so one can possibly trigger a file syncronization method everytime such an acknowledgement occurs thus implementing raid over network. rgds, On Sun, Jun 09, 2002 at 03:18:01AM -0400, Deepak Jain wrote: > > Depends on your application. The easiest things to do would be to look to > your application for this sort of support. > > I can't think of too many applications that are _that_ important and _that_ > sensitive to dataloss that aren't databases. Databases support this sort of > replication (SQL style), and many applications that use proprietary formats > support simultaneous writes to media. > > Your third option is to use a SAN that supports RAID 10. > > Hope this helps, > > Deepak Jain > AiNET > > -----Original Message----- > From: owner-freebsd-questions@FreeBSD.ORG > [mailto:owner-freebsd-questions@FreeBSD.ORG]On Behalf Of S H A N > Sent: Saturday, June 08, 2002 11:18 PM > To: FreeBSD Questions > Subject: Re: Network RAID on FreeBSD - is it possible? > > > hi, > > implement vinum on nfs disks.. try your luck... u'r mileage may vary :) > > On Sun, Jun 09, 2002 at 10:06:51AM +1000, BSD Freak wrote: > > 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)...... > > > > --------------------------------------------------------------------- > > Would you like to receive faxes to your personal email address? > > You can with mBox. Visit http://www.mbox.com.au/fax > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > > with "unsubscribe freebsd-questions" in the body of the message > > -- > S H A N > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-questions" in the body of the message > -- S H A N To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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