Date: Tue, 14 Aug 2007 15:41:04 +0200 From: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= <des@des.no> To: freebsd-chat@FreeBSD.ORG Cc: ama@ugr.es Subject: Re: Virtualization versus jails Message-ID: <86vebikzdb.fsf@ds4.des.no> In-Reply-To: <200708141320.l7EDKTxJ085964@lurza.secnetix.de> (Oliver Fromme's message of "Tue\, 14 Aug 2007 15\:20\:29 %2B0200 \(CEST\)") References: <200708141320.l7EDKTxJ085964@lurza.secnetix.de>
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Oliver Fromme <olli@lurza.secnetix.de> writes: > Jails don't give you a perfect separation. Jails still run under the > same kernel as the host system, and if there's a bug somewhere, you're > out of luck. You can also run into various kinds of resource > starvation with jails, i.e. jails can use up shared resources. All of > that isn't possible (or at least to a much smaller degree) with > virtualization solutions (xen, qemu, vmware, whatever), because they > run the guest systems in a virtual machine with their own kernel and > resources. In addition, numerous system features are not available or do not work properly in jails. You can't run a DHCP server in a jail, nor can you easily run multiple PostgreSQL servers in separate jails on the same machine. DES -- Dag-Erling Smørgrav - des@des.no
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