From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C05FEC04AB4 for ; Fri, 17 May 2019 23:15:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0CE292166E for ; Fri, 17 May 2019 23:15:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728024AbfEQXP3 (ORCPT ); Fri, 17 May 2019 19:15:29 -0400 Received: from zaphod.cobb.me.uk ([213.138.97.131]:43746 "EHLO zaphod.cobb.me.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727366AbfEQXP2 (ORCPT ); Fri, 17 May 2019 19:15:28 -0400 Received: by zaphod.cobb.me.uk (Postfix, from userid 107) id EF02A142BC3; Sat, 18 May 2019 00:15:26 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cobb.uk.net; s=201703; t=1558134926; bh=1nRSrl/8y0h2QZddE1PvBXrrQ6Hsf64l0cH1nGeItxw=; h=Subject:To:References:From:Date:In-Reply-To:From; b=twlMWf/rD4mVx9G+MLg/yKtFhihdze1UB6mwLlHN7pp/MkRM+XO81CvluvXk7QC2/ Rshs+1Wnnjey/xXv1UgO0qv57VgBl6H5xXSJtsPHJM+PHwoFxaCiBjvqYMkCesfJDe EiHR8qvQz7vtJlxbYQTzRLUKBJNo9Bv6l1yWQOjNZHevZmsdkhD6lwYlAbaogGDNN9 NqgXy1vOtYn/ug4BYCavXkL5zWqmKSXjVOveySQsuQQ2LO8ijM5NZmZ5y7liVu9LmQ 0XoLkiI2NpEuPp8lAWmvzIR2Je4mTipIWVPa8atHw136cU4s/V1yRwTorRy/LX7/4z mP7wG9YjRqjOw== Received: from black.home.cobb.me.uk (unknown [192.168.0.205]) by zaphod.cobb.me.uk (Postfix) with ESMTP id 7C5BF142BC2 for ; Sat, 18 May 2019 00:15:26 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cobb.uk.net; s=201703; t=1558134926; bh=1nRSrl/8y0h2QZddE1PvBXrrQ6Hsf64l0cH1nGeItxw=; h=Subject:To:References:From:Date:In-Reply-To:From; b=twlMWf/rD4mVx9G+MLg/yKtFhihdze1UB6mwLlHN7pp/MkRM+XO81CvluvXk7QC2/ Rshs+1Wnnjey/xXv1UgO0qv57VgBl6H5xXSJtsPHJM+PHwoFxaCiBjvqYMkCesfJDe EiHR8qvQz7vtJlxbYQTzRLUKBJNo9Bv6l1yWQOjNZHevZmsdkhD6lwYlAbaogGDNN9 NqgXy1vOtYn/ug4BYCavXkL5zWqmKSXjVOveySQsuQQ2LO8ijM5NZmZ5y7liVu9LmQ 0XoLkiI2NpEuPp8lAWmvzIR2Je4mTipIWVPa8atHw136cU4s/V1yRwTorRy/LX7/4z mP7wG9YjRqjOw== Received: from [192.168.0.211] (novatech.home.cobb.me.uk [192.168.0.211]) by black.home.cobb.me.uk (Postfix) with ESMTPS id 4476268DFA for ; Sat, 18 May 2019 00:15:26 +0100 (BST) Subject: Re: Used disk size of a received subvolume? To: linux-btrfs@vger.kernel.org References: <20190516171225.GH1667@carfax.org.uk> <27af7824-f3e9-47a5-7760-d3e30827a081@tty0.ch> <811bcd96-5a8e-cb10-7efb-22c1046e0f42@cobb.uk.net> <24f44d54-a560-0b6e-5fe0-026626d1d2c5@steev.me.uk> From: Graham Cobb Openpgp: preference=signencrypt Autocrypt: addr=g.btrfs@cobb.uk.net; prefer-encrypt=mutual; keydata= mQINBFaetnIBEAC5cHHbXztbmZhxDof6rYh/Dd5otxJXZ1p7cjE2GN9hCH7gQDOq5EJNqF9c VtD9rIywYT1i3qpHWyWo0BIwkWvr1TyFd3CioBe7qfo/8QoeA9nnXVZL2gcorI85a2GVRepb kbE22X059P1Z1Cy7c29dc8uDEzAucCILyfrNdZ/9jOTDN9wyyHo4GgPnf9lW3bKqF+t//TSh SOOis2+xt60y2In/ls29tD3G2ANcyoKF98JYsTypKJJiX07rK3yKTQbfqvKlc1CPWOuXE2x8 DdI3wiWlKKeOswdA2JFHJnkRjfrX9AKQm9Nk5JcX47rLxnWMEwlBJbu5NKIW5CUs/5UYqs5s 0c6UZ3lVwinFVDPC/RO8ixVwDBa+HspoSDz1nJyaRvTv6FBQeiMISeF/iRKnjSJGlx3AzyET ZP8bbLnSOiUbXP8q69i2epnhuap7jCcO38HA6qr+GSc7rpl042mZw2k0bojfv6o0DBsS/AWC DPFExfDI63On6lUKgf6E9vD3hvr+y7FfWdYWxauonYI8/i86KdWB8yaYMTNWM/+FAKfbKRCP dMOMnw7bTbUJMxN51GknnutQlB3aDTz4ze/OUAsAOvXEdlDYAj6JqFNdZW3k9v/QuQifTslR JkqVal4+I1SUxj8OJwQWOv/cAjCKJLr5g6UfUIH6rKVAWjEx+wARAQABtDNHcmFoYW0gQ29i YiAoUGVyc29uYWwgYWRkcmVzcykgPGdyYWhhbUBjb2JiLnVrLm5ldD6JAlEEEwECADsCGwEG CwkIBwMCBhUIAgkKCwQWAgMBAh4BAheAAhkBBQJWnr9UFRhoa3A6Ly9rZXlzLmdudXBnLm5l dAAKCRBv35GGXfm3Tte8D/45+/dnVdvzPsKgnrdoXpmvhImGaSctn9bhAKvng7EkrQjgV3cf C9GMgK0vEJu+4f/sqWA7hPKUq/jW5vRETcvqEp7v7z+56kqq5LUQE5+slsEb/A4lMP4ppwd+ TPwwDrtVlKNqbKJOM0kPkpj7GRy3xeOYh9D7DtFj2vlmaAy6XvKav/UUU4PoUdeCRyZCRfl0 Wi8pQBh0ngQWfW/VqI7VsG3Qov5Xt7cTzLuP/PhvzM2c5ltZzEzvz7S/jbB1+pnV9P7WLMYd EjhCYzJweCgXyQHCaAWGiHvBOpmxjbHXwX/6xTOJA5CGecDeIDjiK3le7ubFwQAfCgnmnzEj pDG+3wq7co7SbtGLVM3hBsYs27M04Oi2aIDUN1RSb0vsB6c07ECT52cggIZSOCvntl6n+uMl p0WDrl1i0mJUbztQtDzGxM7nw+4pJPV4iX1jJYbWutBwvC+7F1n2F6Niu/Y3ew9a3ixV2+T6 aHWkw7/VQvXGnLHfcFbIbzNoAvI6RNnuEqoCnZHxplEr7LuxLR41Z/XAuCkvK41N/SOI9zzT GLgUyQVOksdbPaxTgBfah9QlC9eXOKYdw826rGXQsvG7h67nqi67bp1I5dMgbM/+2quY9xk0 hkWSBKFP7bXYu4kjXZUaYsoRFEfL0gB53eF21777/rR87dEhptCnaoXeqbkBDQRWnrnDAQgA 0fRG36Ul3Y+iFs82JPBHDpFJjS/wDK+1j7WIoy0nYAiciAtfpXB6hV+fWurdjmXM4Jr8x73S xHzmf9yhZSTn3nc5GaK/jjwy3eUdoXu9jQnBIIY68VbgGaPdtD600QtfWt2zf2JC+3CMIwQ2 fK6joG43sM1nXiaBBHrr0IadSlas1zbinfMGVYAd3efUxlIUPpUK+B1JA12ZCD2PCTdTmVDe DPEsYZKuwC8KJt60MjK9zITqKsf21StwFe9Ak1lqX2DmJI4F12FQvS/E3UGdrAFAj+3HGibR yfzoT+w9UN2tHm/txFlPuhGU/LosXYCxisgNnF/R4zqkTC1/ao7/PQARAQABiQIlBBgBAgAP BQJWnrnDAhsMBQkJZgGAAAoJEG/fkYZd+bdO9b4P/0y3ADmZkbtme4+Bdp68uisDzfI4c/qo XSLTxY122QRVNXxn51yRRTzykHtv7/Zd/dUD5zvwj2xXBt9wk4V060wtqh3lD6DE5mQkCVar eAfHoygGMG+/mJDUIZD56m5aXN5Xiq77SwTeqJnzc/lYAyZXnTAWfAecVSdLQcKH21p/0AxW GU9+IpIjt8XUEGThPNsCOcdemC5u0I1ZeVRXAysBj2ymH0L3EW9B6a0airCmJ3Yctm0maqy+ 2MQ0Q6Jw8DWXbwynmnmzLlLEaN8wwAPo5cb3vcNM3BTcWMaEUHRlg82VR2O+RYpbXAuPOkNo 6K8mxta3BoZt3zYGwtqc/cpVIHpky+e38/5yEXxzBNn8Rn1xD6pHszYylRP4PfolcgMgi0Ny 72g40029WqQ6B7bogswoiJ0h3XTX7ipMtuVIVlf+K7r6ca/pX2R9B/fWNSFqaP4v0qBpyJdJ LO/FP87yHpEDbbKQKW6Guf6/TKJ7iaG3DDpE7CNCNLfFG/skhrh5Ut4zrG9SjA+0oDkfZ4dI B8+QpH3mP9PxkydnxGiGQxvLxI5Q+vQa+1qA5TcCM9SlVLVGelR2+Wj2In+t2GgigTV3PJS4 tMlN++mrgpjfq4DMYv1AzIBi6/bSR6QGKPYYOOjbk+8Sfao0fmjQeOhj1tAHZuI4hoQbowR+ myxb Message-ID: <04d3b1ac-2a3e-f79e-59be-513c00eb8bb1@cobb.uk.net> Date: Sat, 18 May 2019 00:15:25 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 MIME-Version: 1.0 In-Reply-To: <24f44d54-a560-0b6e-5fe0-026626d1d2c5@steev.me.uk> Content-Type: text/plain; charset=windows-1252 Content-Language: en-GB Content-Transfer-Encoding: 7bit Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org On 17/05/2019 17:39, Steven Davies wrote: > On 17/05/2019 16:28, Graham Cobb wrote: > >> That is why I created my "extents-list" stuff. This is a horrible hack >> (one day I will rewrite it using the python library) which lets me >> answer questions like: "how much space am I wasting by keeping >> historical snapshots", "how much data is being shared between two >> subvolumes", "how much of the data in my latest snapshot is unique to >> that snapshot" and "how much space would I actually free up if I removed >> (just) these particular directories". None of which can be answered from >> the existing btrfs command line tools (unless I have missed something). > > I have my own horrible hack to do something like this; if you ever get > around to implementing it in Python could you share the code? > Sure. The current hack (using shell and command line tools) is at https://github.com/GrahamCobb/extents-lists. If the python version ever materialises I expect it will end up there as well.