Date: Fri, 3 Jun 2011 02:37:53 +0200 From: Per von Zweigbergk <pvz@itassistans.se> To: Patrick Lamaiziere <patfbsd@davenulle.org> Cc: freebsd-fs@freebsd.org, freebsd-net@freebsd.org, John <jwd@SlowBlink.Com> Subject: Re: Production use of carp? Message-ID: <2E31CF74-416A-4310-9102-FD0C86275D0E@itassistans.se> In-Reply-To: <20110603001036.5ad0ff8d@davenulle.org> References: <20110602203940.GA80549@slowblink.com> <20110603001036.5ad0ff8d@davenulle.org>
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3 jun 2011 kl. 00.10 skrev Patrick Lamaiziere: > You may want to implement your own control because if the two hosts > cannot communicate, you will have two masters. This can happen if the > links on the both hosts are up, but none packet are forwarded (ie the > switch connecting the two boxes is broken in some way). As a general thought that might be interesting when you're building your = HA solution: One less-documented feature of VMware ESXi is that it checks whether = it's isolated from the network by pinging the gateway on the management = network. This is how ESXi trys to avoid having a split-brain condition - by = making sure that it only considers itself to be the master if it can = reach the gateway, but cannot reach any other servers. You might = implement gating in a similar way to avoid a split-brain condition in = your HA solution.=
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