Date: Wed, 9 Nov 2005 13:32:22 -0800 From: John-Mark Gurney <gurney_j@resnet.uoregon.edu> To: Danny Howard <dannyman@toldme.com> Cc: freebsd-hackers@freebsd.org, freebsd-geom@freebsd.org Subject: Re: GEOM for multipath? How? Message-ID: <20051109213221.GA775@funkthat.com> In-Reply-To: <20051109212534.GD72876@ratchet.nebcorp.com> References: <20051109212534.GD72876@ratchet.nebcorp.com>
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Danny Howard wrote this message on Wed, Nov 09, 2005 at 13:25 -0800: > And I says to myself "AHA! Multipath should be easy to implement on > FreeBSD as well, via geom." But I can't find an obvious way given > existing geom utils to do this. And like I said, the box I'd use this > on is inaccesible for now. > > Basically, I'd want a provider, that would see two disks, and if it > could talk to one disk, it would, else it would talk to the other. geom_fox is what you are looking for: http://lists.freebsd.org/pipermail/freebsd-current/2003-June/005288.html but as phk mentions: but since the isp driver has very aggresive retrie policies as it is now, the actual usability is still somewhat below par. i.e. if a request goes to one path, it will never be failed, and not get a change to try the other path... I can't seem to find the recent mailing list messages talking about these issues... -- John-Mark Gurney Voice: +1 415 225 5579 "All that I will do, has been done, All that I have, has not."
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