From owner-freebsd-fs@FreeBSD.ORG Fri Sep 27 12:29:49 2013 Return-Path: Delivered-To: freebsd-fs@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTP id A2012F66 for ; Fri, 27 Sep 2013 12:29:49 +0000 (UTC) (envelope-from bra@fsn.hu) Received: from people.fsn.hu (people.fsn.hu [195.228.252.137]) (using TLSv1 with cipher ADH-CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 5336328E0 for ; Fri, 27 Sep 2013 12:29:48 +0000 (UTC) Received: by people.fsn.hu (Postfix, from userid 1001) id 46EE311B88DE; Fri, 27 Sep 2013 14:29:40 +0200 (CEST) X-Bogosity: Ham, tests=bogofilter, spamicity=0.350304, version=1.2.3 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MF-ACE0E1EA [pR: 9.1069] X-CRM114-CacheID: sfid-20130927_14293_669B5939 X-CRM114-Status: Good ( pR: 9.1069 ) X-DSPAM-Result: Whitelisted X-DSPAM-Processed: Fri Sep 27 14:29:40 2013 X-DSPAM-Confidence: 0.7002 X-DSPAM-Probability: 0.0000 X-DSPAM-Signature: 52457a3441081262551121 X-DSPAM-Factors: 27, From*Attila Nagy , 0.00010, zfs, 0.00481, zfs, 0.00481, From*Attila, 0.00529, says+the, 0.00529, Subject*system, 0.00661, To*FreeBSD.org, 0.00682, 0+53, 0.00879, If+not, 0.00958, Received*online.co.hu+[195.228.243.99]), 0.01000, STATE, 0.99000, Received*[195.228.243.99]), 0.01000, Received*online.co.hu, 0.01000, From*Attila+Nagy, 0.01000, Subject*zfs, 0.01000, USED, 0.99000, Received*(japan.t, 0.01000, es+on, 0.99000, From*Nagy+; Fri, 27 Sep 2013 14:29:39 +0200 (CEST) Message-ID: <52457A32.2090105@fsn.hu> Date: Fri, 27 Sep 2013 14:29:38 +0200 From: Attila Nagy MIME-Version: 1.0 To: freebsd-fs@FreeBSD.org Subject: zfs: the exponential file system from hell Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 27 Sep 2013 12:29:49 -0000 Hi, Did anyone try to fill a zpool with multiple zfs in it and graph the space accounted by df and zpool list? If not, here it is: https://picasaweb.google.com/104147045962330059540/FreeBSDZfsVsDf#5928271443977601554 The zpool in question: NAME STATE READ WRITE CKSUM mnt ONLINE 0 0 0 raidz2-0 ONLINE 0 0 0 da1 ONLINE 0 0 0 da2 ONLINE 0 0 0 da3 ONLINE 0 0 0 da4 ONLINE 0 0 0 raidz2-1 ONLINE 0 0 0 da5 ONLINE 0 0 0 da6 ONLINE 0 0 0 da7 ONLINE 0 0 0 da8 ONLINE 0 0 0 raidz2-2 ONLINE 0 0 0 da9 ONLINE 0 0 0 da10 ONLINE 0 0 0 da11 ONLINE 0 0 0 da13 ONLINE 0 0 0 And the zfs-es on it: NAME USED AVAIL REFER MOUNTPOINT mnt 23.3G 0 53.8K /mnt mnt/p1 3.89G 0 3.89G /mnt/p1 mnt/p2 3.89G 0 3.89G /mnt/p2 mnt/p3 3.89G 0 3.89G /mnt/p3 mnt/p4 3.89G 0 3.89G /mnt/p4 mnt/p5 3.89G 0 3.89G /mnt/p5 mnt/p6 3.89G 0 3.89G /mnt/p6 I have evenly filled the six zfs in 1/100th percents of the full space available, and graphed the results of zpool list's capacity and df's capacity. The x scale is the real space usage in percents. It's quite annoying when df says the file systems are 20% full, while in reality, they are at 60%. Any chance that it will be solved?