Date: Wed, 8 Jun 2016 15:53:57 +0200 (CEST) From: =?ISO-8859-1?Q?Trond_Endrest=F8l?= <Trond.Endrestol@fagskolen.gjovik.no> To: Niklaas Baudet von Gersdorff <stdin@niklaas.eu> Cc: freebsd-questions@freebsd.org, freebsd-net@freebsd.org Subject: Re: Getting CARP to broadcast on a different interface Message-ID: <alpine.BSF.2.20.1606081547300.1240@mail.fig.ol.no> In-Reply-To: <20160608124310.GG2050@box-hlm-03.niklaas.eu> References: <20160608124310.GG2050@box-hlm-03.niklaas.eu>
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On Wed, 8 Jun 2016 14:43+0200, Niklaas Baudet von Gersdorff wrote: > Hello, > > is it possible to configure CARP in such a way that it sends its > broadcasts on an interface different from the one that gets the shared > IP address assigned? Unfortunately, my provider blocks broadcast and > multicast on public interfaces of virtual machines. > > However, they offer to set up an additional virtual NIC that directly > connects multiple virtual machines on which broadcast and multicast are > not blocked. So, while I assign a shared IP to the public interface > vtnet0, I would like to configure CARP to broadcast on the private > interface vtnet1. > > Is that possible? Or are there alternatives for CARP that support this > function? Although it sounds pretty bad, you could set up CARP on the internal network and use those CARP events to control the main interfaces, e.g. re-adjust their annoncement intervals, or something equally awful. You might end up locked out of your systems unless you can control them remotely using a third set of means, e.g. RDP. Just a quick thought that popped up in my head. -- +-------------------------------+------------------------------------+ | Vennlig hilsen, | Best regards, | | Trond Endrestøl, | Trond Endrestøl, | | IT-ansvarlig, | System administrator, | | Fagskolen Innlandet, | Gjøvik Technical College, Norway, | | tlf. mob. 952 62 567, | Cellular...: +47 952 62 567, | | sentralbord 61 14 54 00. | Switchboard: +47 61 14 54 00. | +-------------------------------+------------------------------------+ From owner-freebsd-questions@freebsd.org Wed Jun 8 14:16:08 2016 Return-Path: <owner-freebsd-questions@freebsd.org> Delivered-To: freebsd-questions@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id BB078B6EE7E for <freebsd-questions@mailman.ysv.freebsd.org>; Wed, 8 Jun 2016 14:16:08 +0000 (UTC) (envelope-from freebsd@qeng-ho.org) Received: from bede.qeng-ho.org (bede.qeng-ho.org [217.155.128.241]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "fileserver.home.qeng-ho.org", Issuer "fileserver.home.qeng-ho.org" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 341A8146B for <freebsd-questions@freebsd.org>; Wed, 8 Jun 2016 14:16:07 +0000 (UTC) (envelope-from freebsd@qeng-ho.org) Received: from arthur.home.qeng-ho.org (arthur.home.qeng-ho.org [172.23.1.2]) by bede.home.qeng-ho.org (8.15.2/8.15.2) with ESMTP id u58Dws7j044510; Wed, 8 Jun 2016 14:58:55 +0100 (BST) (envelope-from freebsd@qeng-ho.org) Subject: Re: Feedback on UFS2 tuning for large number of small files (~100m) To: Eduardo Morras <emorrasg@yahoo.es>, freebsd-questions@freebsd.org References: <CA+Tk8fyZjdvb70HFfwJBD=+J4PU9Ae5FcsaQgSvMZW5B2T3YLA@mail.gmail.com> <20160608125325.71fab3fe95b0bc3c6272ea7c@yahoo.es> From: Arthur Chance <freebsd@qeng-ho.org> Cc: ciprian.craciun@gmail.com Message-ID: <67d9d4ae-03c1-f141-92d0-daaa4b168b16@qeng-ho.org> Date: Wed, 8 Jun 2016 14:58:54 +0100 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:45.0) Gecko/20100101 Thunderbird/45.1.0 MIME-Version: 1.0 In-Reply-To: <20160608125325.71fab3fe95b0bc3c6272ea7c@yahoo.es> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: User questions <freebsd-questions.freebsd.org> List-Unsubscribe: <https://lists.freebsd.org/mailman/options/freebsd-questions>, <mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe> List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions/>; List-Post: <mailto:freebsd-questions@freebsd.org> List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help> List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/freebsd-questions>, <mailto:freebsd-questions-request@freebsd.org?subject=subscribe> X-List-Received-Date: Wed, 08 Jun 2016 14:16:08 -0000 On 08/06/2016 11:53, Eduardo Morras via freebsd-questions wrote: > On Wed, 8 Jun 2016 11:14:40 +0300 > Ciprian Dorin Craciun <ciprian.craciun@gmail.com> wrote: > >> Hello all! (Please keep me in CC as I'm not subscribed on the mailing >> list. Should I perhaps post this to the `freebsd-fs` mailing list?) >> >> >> I would like your feedback on tuning a UFS2 file-system for the >> following use-case, which is very similar to a maildir mail server. I >> tried to look for hints on the internet, but found nothing more >> in-depth than enabling soft-updates, `noatime`, etc. >> > > You can use tunefs to set: > > a) average file size and expected number of files per directory, > b) check if your filesystem has any ACL flags on (NFS, POSIX, whatever) and disable them if you don't use ACLs, > c) if filesystem is full or near full, system switch from faster writes to minimize fragmentation strategy (slower), force the fast access optimization. > > They requires a umount/mount only no reformating. > > Newfs can set those values at fs formatting/createing. > > There are some sysctl you can tweak, again without reformating: > > vfs.ufs.dirhash_maxmem: maximum allowed dirhash memory usage Minor point: this looks like it's dependent on the memory size. On my 32GB machine it's 27.8 MB, on my 4GB machine it's 6.5 MB, and on a 2GB machine it's 3.3 MB. > > Defaul value is 6MB. Check first dirhash usage with > > #sysctl vfs.ufs.dirhash_mem > > and if it's equal or close to maxmem, grow it (24MB or more, f.ex.) > > Tuning at ffs level are more tricky and risky, check sysctl vfs.ffs.* -- Moore's Law of Mad Science: Every eighteen months, the minimum IQ necessary to destroy the world drops by one point.
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