From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from firstgate.proxmox.com (firstgate.proxmox.com [212.224.123.68]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.proxmox.com (Postfix) with ESMTPS id A112D6587E for ; Fri, 24 Jul 2020 00:00:11 +0200 (CEST) Received: from firstgate.proxmox.com (localhost [127.0.0.1]) by firstgate.proxmox.com (Proxmox) with ESMTP id 878922CB3B for ; Thu, 23 Jul 2020 23:59:41 +0200 (CEST) Received: from mout.web.de (mout.web.de [217.72.192.78]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by firstgate.proxmox.com (Proxmox) with ESMTPS id BB2822CB2E for ; Thu, 23 Jul 2020 23:59:39 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=web.de; s=dbaedf251592; t=1595541573; bh=g+sFAUxZE/8Ru8cBu0SiwYYUbOmfNO/K86o1QcyYwts=; h=X-UI-Sender-Class:Subject:To:References:From:Date:In-Reply-To; b=no71jhDBN8L/55mmpbmKlTYXQ0b/Yg422GGLmOIppG3HE+z47s1CreSZ99adXGB6M 8fzLK0Wr/jzi/qggKYYVeag31mZgTXftTjKhQ2G8TEoFRkUaHAtRxMIYCDSCVPewaq I6NfOCYyF5tZm9F6UJDDuCCrBa/llVuSo8Gjy9XQ= X-UI-Sender-Class: c548c8c5-30a9-4db5-a2e7-cb6cb037b8f9 Received: from Rolands-MacBook-Pro.cybercon.de ([93.135.183.216]) by smtp.web.de (mrweb101 [213.165.67.124]) with ESMTPSA (Nemesis) id 0Ldn6l-1kgcvH41qd-00j60V; Thu, 23 Jul 2020 23:59:33 +0200 To: Proxmox VE user list , Daniel Berteaud References: <1110267368.76036.1595436034847.JavaMail.zimbra@fws.fr> <1595486387.pi9zv7y79a.astroid@nora.none> <141180690.77175.1595487181182.JavaMail.zimbra@fws.fr> From: Roland Message-ID: Date: Thu, 23 Jul 2020 23:59:31 +0200 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <141180690.77175.1595487181182.JavaMail.zimbra@fws.fr> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:pS4wKYa6ta2aONVfJ0BeV6ZWp5XDttjHgdXOjFQ50dumkYYP0jE 1qWU3hElqfgZIRCJnFJCsY8rtOSwIOzlxpVYDa1peY74A0QfDsiI2bvHbGhJ61CCcKd+5F4 9hkFwOfzp6UAQL4wRLk4EFzv6ZNzTse9XbOqkD9cI2MIVruLfa0RS004aSkVTVI/tfBWIph ekzkf8fi0wShnPRD/iObQ== X-Spam-Flag: NO X-UI-Out-Filterresults: notjunk:1;V03:K0:6K+cXlIT2Ds=:XR9OYrf7hb84QLbLup4Gqv M2/Dg+rsaOP6EqJKHxRzKUfcq7NSG31kfLsgbBW9ULTNJij/EvYpdUndyFjvRzTem/DkR7vSj SvA47Wg9Ei5Njes5qTcp+UK+mUdCyS88hnmpaFNuTiqZuN5xhUf0sQKYDUN69RRyuoWg8b3S8 v2wU3snmj7Isl379jawvWTrFQZQELiQhxu+TKEgouinKzvjEjEJIhrTiJ0MklOWUMBNs65raT gZeuwINhERdV7ZntLrhYCZH1VeP6Re+VO28X7hSwF8P/G9qgVz1OZQ5HQ8Z27+doHwrb/8hMO pdA9JdCJR49boP/0Xd6RWrQfnUkdyinZOvOVNsr4pdcvkF0N1+zrf/lhRVG0N/2hsg+CA8BqB 0ucS57Cef/aD9vQgOZnNFAgS4S3ZtJrHKwZZjxWIxPwa5+luRow0dBEAdL9opY/pi7yhoBcwi THZFqSrdXGbe/EHnQfp0Cb43tqJeTlCfnldqKnujSPxtlo4sRdicVbIQYh6di7Btp5+o7MT+H AWHag0Pcc3EoxQjVYHZWxGcxWeo1qrMKFhbxoOFzgTAeargSEeTf78N+/dcb71IIxcvLTmb2w AIqFqkbqkLujJAkzZMt6M2W8wA+6MmaFMx5zhqThmI6zN0dFUYvL6u5qRiVkLF2jJK//YTec3 wVIHv3NXVfahV/VHztCKjVzdnIERedAxFZf5URLNyO+Nxyn/XM+XdKOl/x9jAlU+pH/ng3763 NBkC9KSs8hTwDYeEo/by9hvh+LXVZ6IzYX+bV+u8VyRz7ThC2Qtjk8mgNtTJQHEm7ZmrEppjV VmUMTKgD7J4GpRyIuZX9hhVKIlzJJdff0GECM/3LHwk5WuT0QKUPqyhjSLrgf6xwivN3/bgMS k0yWtv7+TJhQIuzUadGrkRrIwCPau+yZbZYOB6Au5N/XfGJrSvoNzg0DWWedbPfSDx34uzYdt MIQPhNcvXKSSVYY3H8PjTOAeFIsa/G/CwhHqSnijuft+l4AWICcaFeTBWoFgSzSztgvZHtTMy WKj7Fd7ey/HKkzfP/ekK2tw6Sa41z5BJ/O6ZEPYNXVsEj5dnwaJmR0o/Sf0V26Rs7oYoDJoDg ucmXMlCzuV/6ln5eutXs9zQh1FZSXvySkidlaa3lMv/6U0EmB7+c1TW5EbfwQUOkWNrQP0WUj kPh/yNXdddivuZmddYC/36+wilkevyR/dDk/J9YVTzo3iZV/QP3t9ppFo0uWxbE6bpzOnw7Vg U42vgNY104EDUhQWy X-SPAM-LEVEL: Spam detection results: 0 DKIM_SIGNED 0.1 Message has a DKIM or DK signature, not necessarily valid DKIM_VALID -0.1 Message has at least one valid DKIM or DK signature DKIM_VALID_AU -0.1 Message has a valid DKIM or DK signature from author's domain DKIM_VALID_EF -0.1 Message has a valid DKIM or DK signature from envelope-from domain FREEMAIL_FROM 0.001 Sender email is commonly abused enduser mail provider NICE_REPLY_A -1.703 Looks like a legit reply (A) RCVD_IN_DNSWL_LOW -0.7 Sender listed at https://www.dnswl.org/, low trust RCVD_IN_MSPIKE_H2 -0.001 Average reputation (+2) SPF_HELO_NONE 0.001 SPF: HELO does not publish an SPF Record SPF_PASS -0.001 SPF: sender matches SPF record Subject: Re: [PVE-User] PBS : is dirty-bitmap really accurate ? X-BeenThere: pve-user@lists.proxmox.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: Proxmox VE user list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 23 Jul 2020 22:00:11 -0000 i just had a look on that, too - i was backing up a VM i backed up this afternoon, and for my curiosity 1GB out of 15GB was marked dirty. that looks a quite much for me for a mostly idle system, because there was definitely only a little bit of change on the system within logfiles in /var/log so i wonder what marked all that blocks dirty.... i'm also suspecting atime changes...will keep an eye on that.... regards roland Am 23.07.20 um 08:53 schrieb Daniel Berteaud: > ----- Le 23 Juil 20, =C3=A0 8:43, Fabian Gr=C3=BCnbichler f.gruenbichler= @proxmox.com a =C3=A9crit : > >> possibly you haven't upgraded to pve-qemu-kvm 5.0-11 (or your VM hasn't >> been restarted yet since the upgrade): >> >> https://git.proxmox.com/?p=3Dpve-qemu.git;a=3Dcommit;h=3Df257cc05f4fbf7= 72cad3231021b3ce7587127a1b > I'm running pve-qemu-kvm 5.0.0-11, and all the implied VM have been eith= er (cold) rebooted, or migrated. > >> the bitmap has a granularity of 4MB, so depending on the activity insid= e >> you can see quite a bit of amplification. also writing and then >> zeroing/reverting again to the old content would leave a mark in the >> bitmap without permanently changing the contents. >> > Yes, I'd expect some amplification, but not that much. For my Zabbix ser= ver, it's nearly canceling all the benefit of using a dirty bitmap. > One thing I've noted, is that I get expected values at least for one gue= st, running PfSense (where I get ~150MB of dirty blocks each days). Most o= f my other VM are Linux, I'll check if it could be related to the atime up= date or something > > Cheers, > Daniel >