From owner-freebsd-security@FreeBSD.ORG  Thu Jul 10 18:19:31 2003
Return-Path: <owner-freebsd-security@FreeBSD.ORG>
Delivered-To: freebsd-security@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id EE5A337B404
	for <freebsd-security@freebsd.org>;
	Thu, 10 Jul 2003 18:19:31 -0700 (PDT)
Received: from vista.netmemetic.com (bb-203-125-41-203.singnet.com.sg
	[203.125.41.203])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 2ECE343F3F
	for <freebsd-security@freebsd.org>;
	Thu, 10 Jul 2003 18:19:29 -0700 (PDT)
	(envelope-from ngps@netmemetic.com)
Received: by vista.netmemetic.com (Postfix, from userid 100)
	id 52BC2301; Fri, 11 Jul 2003 09:22:24 +0800 (SGT)
Date: Fri, 11 Jul 2003 09:22:24 +0800
From: Ng Pheng Siong <ngps@netmemetic.com>
To: "V. Jones" <vjones62@earthlink.net>
Message-ID: <20030711012224.GB920@vista.netmemetic.com>
References: <1007042.1057880975396.JavaMail.nobody@kermit.psp.pas.earthlink.net>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <1007042.1057880975396.JavaMail.nobody@kermit.psp.pas.earthlink.net>
User-Agent: Mutt/1.4i
cc: freebsd-security@freebsd.org
Subject: Re: jail performance questions
X-BeenThere: freebsd-security@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Security issues [members-only posting]
	<freebsd-security.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-security>,
	<mailto:freebsd-security-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-security>
List-Post: <mailto:freebsd-security@freebsd.org>
List-Help: <mailto:freebsd-security-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-security>,
	<mailto:freebsd-security-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 11 Jul 2003 01:19:32 -0000

On Thu, Jul 10, 2003 at 04:48:21PM -0400, V. Jones wrote:
> I've found several examples showing how to set the jails up.  
> My questions involve system requirements.  Assuming plenty of 
> disk space, 1GB ram and a dual processor PIII 1.13Ghz system, 
> how many jails can I run?  Would I notice a significant 
> performance hit if, for example, I run three jails?

I haven't noticed performance degradation, but my jails aren't doing much.

There are several providers selling jail-based virtual servers.

I didn't consult the source, but my understanding is that a jail marks
individual processes, so, e.g., if a jail runs just one process, that's the
(operational, I don't know about startup) overhead for that jail.


-- 
Ng Pheng Siong <ngps@netmemetic.com> 

http://firewall.rulemaker.net  -+- Manage Your Firewall Rulebase Changes
http://www.post1.com/home/ngps -+- Open Source Python Crypto & SSL