From owner-freebsd-questions@freebsd.org Mon Jun 3 08:33:27 2019 Return-Path: Delivered-To: freebsd-questions@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 0723B15A886A for ; Mon, 3 Jun 2019 08:33:27 +0000 (UTC) (envelope-from matthew@FreeBSD.org) Received: from smtp.freebsd.org (smtp.freebsd.org [IPv6:2610:1c1:1:606c::24b:4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "smtp.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 8DB206CE90 for ; Mon, 3 Jun 2019 08:33:26 +0000 (UTC) (envelope-from matthew@FreeBSD.org) Received: from smtp.infracaninophile.co.uk (smtp.infracaninophile.co.uk [IPv6:2001:8b0:151:1:c4ea:bd49:619b:6cb3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "smtp.infracaninophile.co.uk", Issuer "Let's Encrypt Authority X3" (verified OK)) (Authenticated sender: matthew/mail) by smtp.freebsd.org (Postfix) with ESMTPSA id 4D30611706 for ; Mon, 3 Jun 2019 08:33:26 +0000 (UTC) (envelope-from matthew@FreeBSD.org) Received: from leaf.local (unknown [88.212.184.97]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: m.seaman@infracaninophile.co.uk) by smtp.infracaninophile.co.uk (Postfix) with ESMTPSA id 1D1E11FC for ; Mon, 3 Jun 2019 08:33:25 +0000 (UTC) Authentication-Results: smtp.infracaninophile.co.uk/1D1E11FC; dkim=none; dkim-atps=neutral Subject: Re: to jail or not to jail To: freebsd-questions@freebsd.org References: <9783db6e-959e-b177-89d5-84af47fd5c3f@FreeBSD.org> <1231820b-830b-4a22-8b08-37242226d276@www.fastmail.com> From: Matthew Seaman Message-ID: <5d9af532-45fc-b088-893d-ec413460b2ff@FreeBSD.org> Date: Mon, 3 Jun 2019 09:33:25 +0100 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:60.0) Gecko/20100101 Thunderbird/60.7.0 MIME-Version: 1.0 In-Reply-To: <1231820b-830b-4a22-8b08-37242226d276@www.fastmail.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-GB Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 8DB206CE90 X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-2.99 / 15.00]; local_wl_from(0.00)[FreeBSD.org]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; NEURAL_HAM_SHORT(-0.99)[-0.991,0]; ASN(0.00)[asn:11403, ipnet:2610:1c1:1::/48, country:US] X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 03 Jun 2019 08:33:27 -0000 On 02/06/2019 12:41, Dave Cottlehuber wrote: >> think about using vimage jails on 12.0, as that makes the jails seem a >> lot more like just regular VMs, and gives you the ability to effectively >> create a private virtual switch inside your server, rather than having >> services appear on external interfaces. Beware though that there are >> currently some quite severe bandwidth limitations on this sort of >> internally virtualized networking under FreeBSD, so this is not suitable >> for a high-traffic system. > Matthew, anything you can point me to about this limitation? Kristof Provost talked about it during his presentation at BSDCAN -- the video of that is not turning up in my searches, but here's probably a very similar talk from linux.conf.au: https://www.youtube.com/watch?v=2neDPNIcrBk In short the problem is that there's a single thread for handling all the internal traffic. (Possibly a single lock as well?) Cheers, Matthew