From owner-freebsd-jail@FreeBSD.ORG Mon Feb 6 20:53:04 2012 Return-Path: Delivered-To: freebsd-jail@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id E3B99106564A; Mon, 6 Feb 2012 20:53:04 +0000 (UTC) (envelope-from prvs=1383ec7016=killing@multiplay.co.uk) Received: from mail1.multiplay.co.uk (mail1.multiplay.co.uk [85.236.96.23]) by mx1.freebsd.org (Postfix) with ESMTP id 402168FC16; Mon, 6 Feb 2012 20:53:03 +0000 (UTC) X-Spam-Processed: mail1.multiplay.co.uk, Mon, 06 Feb 2012 20:41:39 +0000 X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on mail1.multiplay.co.uk X-Spam-Level: X-Spam-Status: No, score=-5.0 required=6.0 tests=USER_IN_WHITELIST shortcircuit=ham autolearn=disabled version=3.2.5 Received: from r2d2 ([188.220.16.49]) by mail1.multiplay.co.uk (mail1.multiplay.co.uk [85.236.96.23]) (MDaemon PRO v10.0.4) with ESMTP id md50017912421.msg; Mon, 06 Feb 2012 20:41:37 +0000 X-MDRemoteIP: 188.220.16.49 X-Return-Path: prvs=1383ec7016=killing@multiplay.co.uk X-Envelope-From: killing@multiplay.co.uk Message-ID: From: "Steven Hartland" To: "Doug Barton" , References: <4F30381E.2020100@FreeBSD.org> Date: Mon, 6 Feb 2012 20:41:40 -0000 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5931 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.6157 Cc: Subject: Re: Practical limit to number of jails on a given host? X-BeenThere: freebsd-jail@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Discussion about FreeBSD jail\(8\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 06 Feb 2012 20:53:05 -0000 ----- Original Message ----- From: "Doug Barton" > So first question is, is there some sort of hard-coded limit somewhere? > If not, what is the largest number of jails that you've created > successfully/reliably on a system, and what are the specs for that system? We happilly run up ~80 single process jails on 24 core machines without issue. One thing to be aware of is the issue with prison0->uref becoming 0 and panicing the machine if a fix for this hasnt been commited yet. If you need a working patch for this I can provide one. Regards Steve ================================================ This e.mail is private and confidential between Multiplay (UK) Ltd. and the person or entity to whom it is addressed. In the event of misdirection, the recipient is prohibited from using, copying, printing or otherwise disseminating it or any information contained in it. In the event of misdirection, illegible or incomplete transmission please telephone +44 845 868 1337 or return the E.mail to postmaster@multiplay.co.uk.