From owner-freebsd-isp  Fri Feb 20 09:05:13 1998
Return-Path: <owner-freebsd-isp@FreeBSD.ORG>
Received: (from majordom@localhost)
          by hub.freebsd.org (8.8.8/8.8.8) id JAA24550
          for freebsd-isp-outgoing; Fri, 20 Feb 1998 09:05:13 -0800 (PST)
          (envelope-from owner-freebsd-isp@FreeBSD.ORG)
Received: from sinbin.demos.su (sinbin.demos.su [194.87.5.31])
          by hub.freebsd.org (8.8.8/8.8.8) with SMTP id JAA24462
          for <freebsd-isp@FreeBSD.ORG>; Fri, 20 Feb 1998 09:04:42 -0800 (PST)
          (envelope-from bag@sinbin.demos.su)
Received: by sinbin.demos.su id UAA14343;
  (8.6.12/D) Fri, 20 Feb 1998 20:02:49 +0300
From: bag@sinbin.demos.su (Alex G. Bulushev)
Message-Id: <199802201702.UAA14343@sinbin.demos.su>
Subject: Re: fault tolerant :)) setup
In-Reply-To: <Pine.BSF.3.96.980220092225.5147A-100000@uhf.wireless.net> from "Bernie Doehner" at "Feb 20, 98 09:25:06 am"
X-ELM-OSV: (Our standard violations) no-mime=1; no-hdr-encoding=1
To: bad@uhf.wireless.net (Bernie Doehner)
Date: Fri, 20 Feb 1998 20:02:49 +0300 (MSK)
Cc: agdolla@datanet.hu, freebsd-isp@FreeBSD.ORG
X-Mailer: ELM [version 2.4ME+ PL32 (25)]
Content-Type: text
Sender: owner-freebsd-isp@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.org

> > 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