Date: Thu, 5 Mar 1998 10:28:11 +0000 From: njs3@doc.ic.ac.uk (Niall Smart) To: Tom <tom@sdf.com>, Niall Smart <njs3@doc.ic.ac.uk> Cc: "Ron G. Minnich" <Sarnoff.COM!rminnich@minas-tirith.pol.ru>, Alex Povolotsky <tarkhil@minas-tirith.pol.ru>, hackers@FreeBSD.ORG Subject: Re: Cluster? Message-ID: <E0yAXsq-0005qk-00@oak67.doc.ic.ac.uk> In-Reply-To: Tom <tom@sdf.com> "Re: Cluster?" (Mar 4, 9:48am)
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On Mar 4, 9:48am, Tom wrote: } Subject: Re: Cluster? > On Wed, 4 Mar 1998, Niall Smart wrote: > > of months from now though. One particular thing that could benefit > > easily from this are DNS servers, other servers like mail and news wouldn't > > DNS? DNS already has excellent fault-tolerant capabilities. I should have mentioned that I was had dynamic DNS in mind, in this scenario the two (or n) DNS servers could share the data structures in a shared memory region so that an update by any would be reflected in the address spaces of all the others. I agree that DNS has fault tolerant capabilities but I wouldn't call them excellent, its annoying to have to wait for requests to the primary to time out before the resolver library starts hitting on the secondaries. > > be so easy, because of the need for a reliable shared filesystem. Plus > > there is the problem of how to get clients of these servers to contact > > the redundant one in the event of a failure, I think someone has done > > something in this area using proxy arp... > > This is the important bit. IP address assumption is critical. Some > clusters do it by assuming the MAC address to ensure an instant > transition. Hmm, thats an interesting one, can most cards be programmed to accept frames with specific MAC's? Niall To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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