Date: Sat, 2 Sep 2017 15:22:52 +0100 From: Frank Leonhardt <frank2@fjl.co.uk> To: freebsd-questions@freebsd.org Subject: Re: Fun with HAST and inter-host connections Message-ID: <3c89400f-7964-fb0d-6778-84fef964a404@fjl.co.uk> In-Reply-To: <26f53e78-e9e2-d424-fc1d-b0d14b775522@laverenz.de> References: <6cc75798-b7f2-b794-faec-8807616fd7f4@fjl.co.uk> <4199b174-63df-a6a8-6e8e-0e7330dd189f@laverenz.de> <59A8201D.5010702@fjl.co.uk> <26f53e78-e9e2-d424-fc1d-b0d14b775522@laverenz.de>
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On 01/09/2017 09:58, Uwe Laverenz wrote: > Hi, > > Am 31.08.2017 um 16:41 schrieb Frank Leonhardt: > >> The problem with link aggregation is that you need lots of 1Gb >> Ethernet cards and run out PCI slots pretty quickly. Or are you >> suggesting > > Not necessarily, you could use PCIe cards with 2 or 4 ports. > >> multiple targets bound to a particular interface? Not a bad idea, but > > Yes, multiple networks, one target per network, round robin policy. > >> The PCIe is also going to be a bottleneck, but I'm ignoring this for >> now. > > Are you sure? PCIe 3.0 supports 985MB/s on x1. > >> What I really want is the fastest way to connect to boxes using IP >> (preferably). > > Then 10Gb/s ethernet would probably be the best option IMHO. That's what I thought, but 10G is expensive and no fun. I've got my PCIe slots full of HBAs and no space for multiple Ethernet, and it'd take 10+ x 1G ports to match 1x10G. I've experimented with 2-port cards; 4-port cards are usually a bit pricey (apart from some Realtek ones). I wonder if you can still get duel-ported RAM? (And I did think of using nearline drives, before anyone suggests that). The $30 USB 3.1 cards look the most fun right now. (And yes, PCI is a bottleneck because I'm using old motherboards for experimentation). :-( Regards, Frank.
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