Date: Mon, 15 Jul 2002 11:23:42 +0200 From: Andy Sporner <sporner@nentec.de> To: Clifton Royston <cliftonr@lava.net> Cc: aaron g <click46@operamail.com>, freebsd-cluster@FreeBSD.ORG Subject: Re: SPREAD clusters Message-ID: <3D32949E.8040500@nentec.de> References: <20020709212404.16403.qmail@operamail.com> <3D2D483E.4040100@nentec.de> <20020711084338.B18402@lava.net>
next in thread | previous in thread | raw e-mail | index | archive | help
Hi, Clifton Royston wrote: >>the last 4 years and have never had a chance to commit it to a >>document. I suppose it is probably about time to do so. I even came >>up with a way that network applications can survive a node move as >>well, though it requires a special protocol and a front-end device to >>achieve this. For the sake of the front-end device and potential >>single points of failures, we have phase-1 of the clustering >>software, but ultimately, phase-2 should completely replace phase-1 >>for everything else. >> > > I assume this will be targeted at the current -current track (5.x >release) to take advantage of the major rewrite of kernel scheduling >there? > Yes, absolutely. >This sounds like a great project. I'm in agreement with both your >goals and the stages you're talking about to reach it. I've had >daydreams of trying to hammer together something similar, but don't >have the experience with clustering that you've brought to the project. >Addressing basic application failover in a structured way as you've >done does seem like the best place to start, and then go for the big >issues of moving processes, interacting with other kernels, etc. I >agree that it wouldn't make much sense sinking too much effort into >load-balancing the *front* end (network connections) in software at >this stage, when there are hardware products out there that will do it >at a reasonable price. > Well our device starts about 15K (but you get 32 10/100's ports and 4 Gb ports full line speed switching--and High availability--gee I wonder where this comes from ;-)) > > If you don't mind, maybe this sketch of the project you just gave >could be committed to the documentation as a starting point. > Yep. I will write a paper about phase-2. It should be easy if I grab all of the fragments of things I said before. > > > On the storage front, do you think it would be worthwhile to also >address in an upcoming phase the failover of shared storage access, >using something like the "Tertiary Disk project" node design at: > <http://now.cs.berkeley.edu/Td/arch.html>; > I had an idea to extend Vinum in a way to provide "Remote Raw Disks", which might be similar to Tertiary Disk Project. Have you interest in taking this a working point? Andy To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-cluster" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?3D32949E.8040500>