Date: Mon, 11 Apr 2005 18:05:05 +0200 From: Pawel Jakub Dawidek <pjd@FreeBSD.org> To: David Gilbert <dgilbert@dclg.ca> Cc: freebsd-hackers@freebsd.org Subject: Re: ggate failures. Message-ID: <20050411160505.GO837@darkness.comp.waw.pl> In-Reply-To: <16984.18159.732608.234243@canoe.dclg.ca> References: <16984.18159.732608.234243@canoe.dclg.ca>
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[-- Attachment #1 --] On Sat, Apr 09, 2005 at 05:19:43PM -0400, David Gilbert wrote: +> I have two systems, each with 4 300 gig SATA disks. Let's call them +> m0 and m1. M1 exports it's disks with ggated ... on two private GigE +> networks. M0, on those same two GigE networks, imports them with +> ggatec. M0, then does the following: +> +> Mirror Disks +> ====== ===== +> s0 ggate0 da0s1g +> s1 ggate1 da1s1g +> s2 ggate2 da2s1g +> s3 ggate3 da3s1g +> +> And then: +> +> concat Disks +> ====== ===== +> v0 s0 s1 s2 s3 +> +> (so v0 is a concatination of 4 mirrors that consist of a local and +> remote disk, each) +> +> Now... This all works, and we create a filesystem on v0. The problem +> arises that whenever a lot of activity occurs on v0 (untaring a copy +> of /usr is sufficient), the ggate links break down. An example +> message from the dmesg: +> +> GEOM_MIRROR: Request failed (error=5). ggate2[WRITE(offset=259891840000, length=8192)] +> +> Now... I don't know a lot about ggate, but this appears trivial to +> trigger. Has anyone tried similar configurations and is there any +> wisdom about ggate configurations? Set kern.geom.gate.debug to 1 and send output which is generated on failures. I've much improved ggate in perforce, but it needs some polishing still... -- Pawel Jakub Dawidek http://www.wheel.pl pjd@FreeBSD.org http://www.FreeBSD.org FreeBSD committer Am I Evil? Yes, I Am! [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (FreeBSD) iD8DBQFCWqAxForvXbEpPzQRAmSaAKDCLVncaD9NBnmSWtRPlKd6knNVjgCbB8Hp oyOWhkYK2dqchAG9IHmOE6k= =mJyS -----END PGP SIGNATURE-----help
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