Date: Fri, 13 Apr 2007 07:58:08 -0500 From: Eric Anderson <anderson@freebsd.org> To: Ivan Voras <ivoras@fer.hr> Cc: freebsd-geom@freebsd.org Subject: Re: volume management Message-ID: <461F7E60.7090700@freebsd.org> In-Reply-To: <evmc62$s54$1@sea.gmane.org> References: <461A5EC6.8010000@freebsd.org> <20070409154407.GA88621@harmless.hu> <evfqtt$n23$1@sea.gmane.org> <20070410111957.GA85578@garage.freebsd.pl> <461B75B2.40201@fer.hr> <20070410114115.GB85578@garage.freebsd.pl> <20070410161445.GA18858@keira.kiwi-computer.com> <20070410162129.GI85578@garage.freebsd.pl> <20070410172604.GA21036@keira.kiwi-computer.com> <461BCC85.2080900@freebsd.org> <20070410174607.GA26432@harmless.hu> <461BCF8A.3030307@freebsd.org> <evmc62$s54$1@sea.gmane.org>
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On 04/12/07 17:34, Ivan Voras wrote: > Eric Anderson wrote: > >> Personally, what I would want to prevent, is having a server go down due >> to one file system having an issue, when it is serving (or using) many >> more file systems. I currently have a box with 5 10Tb file systems on >> it, and when I mount a 6th file system (2Tb) which I *know* has metadata >> inconsistencies that fsck can't fix, I don't want it to take down all >> 50Tb of good solid storage. > > This is slightly off-topic, but this is one of the reasons full > virtualisation is used. If your kernel panics inside a VM, it's > expendable :) I'm not sure that makes a lot of sense. Honestly, it's not efficient to have a single virtual system for each mount point/file system, because of the overhead. You lose a lot doing that, and only gain the protection of a trapped panic inside a virtualized host. At least one major commercial file system vendor that I have a lot of direct experience with ejects the filesystem from the system if it incurs a serious issue, and returns i/o errors. Truthfully, it's *FAR* better than having the kernel panic and taking out the whole system. This conversation is really a -fs@ discussion, maybe we should move it there? Eric
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