Date: Fri, 20 Feb 1998 20:02:49 +0300 (MSK) From: bag@sinbin.demos.su (Alex G. Bulushev) To: bad@uhf.wireless.net (Bernie Doehner) Cc: agdolla@datanet.hu, freebsd-isp@FreeBSD.ORG Subject: Re: fault tolerant :)) setup Message-ID: <199802201702.UAA14343@sinbin.demos.su> In-Reply-To: <Pine.BSF.3.96.980220092225.5147A-100000@uhf.wireless.net> from "Bernie Doehner" at "Feb 20, 98 09:25:06 am"
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> > infortrand RAID's allow fault-tolerant scheme with two or more servers, > > but it is a problem to mount the same UFS from different servers ... > > > > u can mount disk RW only for one server, after first server fail, > > the second server run fsck and mount disk (or mount disk RO) ... > > it is not good, but we use this scheme ... > > > > may be JFS :) > > > > Alex. > > What do you use on the backup sever to determine that the primary is dead? > I assume something like pinging the other host? this is one way, but it is not safe, some times when server fail it successfully reply on ping ... u can use special tcp/udp daemon or async cable to determing server is alive ... and send info to server after it rebooted that server is now secondary (when an other server became primary during first server fail) > > Is there any way you know of to set up a redudant system such that the ISA > cards from the primary sever are automaticaly hot switched upon dead of > the primary over to the secondary? i think it is impossibly using fbsd for now ... Alex. > > Thanks. > > Bernie > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-isp" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message
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