From owner-freebsd-fs@FreeBSD.ORG Fri Jan 10 07:26:52 2014 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 ESMTPS id 241EBE9B for ; Fri, 10 Jan 2014 07:26:52 +0000 (UTC) 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 29C881F2D for ; Fri, 10 Jan 2014 07:26:50 +0000 (UTC) Received: by people.fsn.hu (Postfix, from userid 1001) id 94718128B790; Fri, 10 Jan 2014 08:26:48 +0100 (CET) X-Bogosity: Ham, tests=bogofilter, spamicity=0.014374, version=1.2.3 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MF-ACE0E1EA [pR: 6.4552] X-CRM114-CacheID: sfid-20140110_08264_1F228031 X-CRM114-Status: Good ( pR: 6.4552 ) X-DSPAM-Result: Whitelisted X-DSPAM-Processed: Fri Jan 10 08:26:48 2014 X-DSPAM-Confidence: 0.9930 X-DSPAM-Probability: 0.0000 X-DSPAM-Signature: 52cfa0b8967101704620511 X-DSPAM-Factors: 27, From*Attila Nagy , 0.00010, FreeBSD, 0.00066, From*Attila, 0.00438, Subject*ZFS, 0.00477, filter, 0.00477, filter, 0.00477, shell, 0.00477, 22+26, 0.00583, config, 0.00655, config, 0.00655, 22+38, 0.00655, 488, 0.00748, 488, 0.00748, Received*online.co.hu+[195.228.243.99]), 0.00872, Received*[195.228.243.99]), 0.00872, 08+22, 0.00872, 08+22, 0.00872, Received*online.co.hu, 0.00872, From*Attila+Nagy, 0.00872, 22+40, 0.00872, Received*(japan.t, 0.00872, From*Nagy+; Fri, 10 Jan 2014 08:26:46 +0100 (CET) Message-ID: <52CFA0B6.7090109@fsn.hu> Date: Fri, 10 Jan 2014 08:26:46 +0100 From: Attila Nagy MIME-Version: 1.0 To: 'freebsd-fs' Subject: What does ZFS write when nothing should write there? Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 10 Jan 2014 07:26:52 -0000 Hi, I've created 6 zpools, each of them with zpool create -m /data/A dataA mirror daX daY. The machine has nothing running except sshd and my shell. Yet, I see this in gstat: # while ( 1 ) while? date while? gstat -b -f 'da[0-9]+$' while? sleep 1 while? end Fri Jan 10 08:22:26 CET 2014 dT: 1.062s w: 1.000s filter: da[0-9]+$ L(q) ops/s r/s kBps ms/r w/s kBps ms/w %busy Name 0 0 0 0 0.0 0 0 0.0 0.0 da0 0 0 0 0 0.0 0 0 0.0 0.0 da1 0 0 0 0 0.0 0 0 0.0 0.0 da2 0 0 0 0 0.0 0 0 0.0 0.0 da3 0 0 0 0 0.0 0 0 0.0 0.0 da4 0 88 0 0 0.0 82 573 4.1 9.0 da5 0 89 0 0 0.0 83 573 4.8 9.8 da6 0 0 0 0 0.0 0 0 0.0 0.0 da7 0 0 0 0 0.0 0 0 0.0 0.0 da8 0 87 0 0 0.0 81 573 2.6 5.7 da9 0 89 0 0 0.0 84 573 3.0 6.7 da10 0 0 0 0 0.0 0 0 0.0 0.0 da11 0 0 0 0 0.0 0 0 0.0 0.0 da12 0 0 0 0 0.0 0 0 0.0 0.0 da13 0 0 0 0 0.0 0 0 0.0 0.0 da14 Fri Jan 10 08:22:28 CET 2014 dT: 1.032s w: 1.000s filter: da[0-9]+$ L(q) ops/s r/s kBps ms/r w/s kBps ms/w %busy Name 0 0 0 0 0.0 0 0 0.0 0.0 da0 0 0 0 0 0.0 0 0 0.0 0.0 da1 0 0 0 0 0.0 0 0 0.0 0.0 da2 0 0 0 0 0.0 0 0 0.0 0.0 da3 0 0 0 0 0.0 0 0 0.0 0.0 da4 0 0 0 0 0.0 0 0 0.0 0.0 da5 0 0 0 0 0.0 0 0 0.0 0.0 da6 0 0 0 0 0.0 0 0 0.0 0.0 da7 0 0 0 0 0.0 0 0 0.0 0.0 da8 0 0 0 0 0.0 0 0 0.0 0.0 da9 0 0 0 0 0.0 0 0 0.0 0.0 da10 0 91 0 0 0.0 85 590 4.9 9.5 da11 0 92 0 0 0.0 86 590 5.1 10.3 da12 0 0 0 0 0.0 0 0 0.0 0.0 da13 0 0 0 0 0.0 0 0 0.0 0.0 da14 Fri Jan 10 08:22:30 CET 2014 dT: 1.020s w: 1.000s filter: da[0-9]+$ L(q) ops/s r/s kBps ms/r w/s kBps ms/w %busy Name 0 0 0 0 0.0 0 0 0.0 0.0 da0 0 0 0 0 0.0 0 0 0.0 0.0 da1 0 0 0 0 0.0 0 0 0.0 0.0 da2 0 0 0 0 0.0 0 0 0.0 0.0 da3 0 0 0 0 0.0 0 0 0.0 0.0 da4 0 0 0 0 0.0 0 0 0.0 0.0 da5 0 0 0 0 0.0 0 0 0.0 0.0 da6 0 0 0 0 0.0 0 0 0.0 0.0 da7 0 0 0 0 0.0 0 0 0.0 0.0 da8 0 0 0 0 0.0 0 0 0.0 0.0 da9 0 0 0 0 0.0 0 0 0.0 0.0 da10 0 0 0 0 0.0 0 0 0.0 0.0 da11 0 0 0 0 0.0 0 0 0.0 0.0 da12 0 0 0 0 0.0 0 0 0.0 0.0 da13 0 0 0 0 0.0 0 0 0.0 0.0 da14 Fri Jan 10 08:22:32 CET 2014 dT: 1.058s w: 1.000s filter: da[0-9]+$ L(q) ops/s r/s kBps ms/r w/s kBps ms/w %busy Name 0 0 0 0 0.0 0 0 0.0 0.0 da0 0 0 0 0 0.0 0 0 0.0 0.0 da1 0 0 0 0 0.0 0 0 0.0 0.0 da2 0 0 0 0 0.0 0 0 0.0 0.0 da3 0 0 0 0 0.0 0 0 0.0 0.0 da4 0 0 0 0 0.0 0 0 0.0 0.0 da5 0 0 0 0 0.0 0 0 0.0 0.0 da6 0 81 0 0 0.0 76 576 1.8 4.1 da7 0 82 0 0 0.0 77 576 2.0 4.8 da8 0 0 0 0 0.0 0 0 0.0 0.0 da9 0 0 0 0 0.0 0 0 0.0 0.0 da10 0 0 0 0 0.0 0 0 0.0 0.0 da11 0 0 0 0 0.0 0 0 0.0 0.0 da12 0 0 0 0 0.0 0 0 0.0 0.0 da13 0 0 0 0 0.0 0 0 0.0 0.0 da14 Fri Jan 10 08:22:34 CET 2014 dT: 1.024s w: 1.000s filter: da[0-9]+$ L(q) ops/s r/s kBps ms/r w/s kBps ms/w %busy Name 0 0 0 0 0.0 0 0 0.0 0.0 da0 0 0 0 0 0.0 0 0 0.0 0.0 da1 0 0 0 0 0.0 0 0 0.0 0.0 da2 0 91 0 0 0.0 85 595 1.4 3.8 da3 0 91 0 0 0.0 85 595 1.5 3.6 da4 0 0 0 0 0.0 0 0 0.0 0.0 da5 0 0 0 0 0.0 0 0 0.0 0.0 da6 0 0 0 0 0.0 0 0 0.0 0.0 da7 0 0 0 0 0.0 0 0 0.0 0.0 da8 0 0 0 0 0.0 0 0 0.0 0.0 da9 0 0 0 0 0.0 0 0 0.0 0.0 da10 0 0 0 0 0.0 0 0 0.0 0.0 da11 0 0 0 0 0.0 0 0 0.0 0.0 da12 0 92 0 0 0.0 86 595 2.0 5.3 da13 0 93 0 0 0.0 87 595 2.0 5.0 da14 Fri Jan 10 08:22:36 CET 2014 dT: 1.073s w: 1.000s filter: da[0-9]+$ L(q) ops/s r/s kBps ms/r w/s kBps ms/w %busy Name 0 0 0 0 0.0 0 0 0.0 0.0 da0 0 81 0 0 0.0 76 568 2.2 4.4 da1 0 82 0 0 0.0 76 568 2.2 4.5 da2 0 0 0 0 0.0 0 0 0.0 0.0 da3 0 0 0 0 0.0 0 0 0.0 0.0 da4 0 88 0 0 0.0 82 568 2.1 5.7 da5 0 90 0 0 0.0 85 568 2.5 7.0 da6 0 0 0 0 0.0 0 0 0.0 0.0 da7 0 0 0 0 0.0 0 0 0.0 0.0 da8 0 47 0 0 0.0 42 488 2.1 3.9 da9 0 48 0 0 0.0 43 488 2.3 4.0 da10 0 0 0 0 0.0 0 0 0.0 0.0 da11 0 0 0 0 0.0 0 0 0.0 0.0 da12 0 0 0 0 0.0 0 0 0.0 0.0 da13 0 0 0 0 0.0 0 0 0.0 0.0 da14 Fri Jan 10 08:22:38 CET 2014 dT: 1.010s w: 1.000s filter: da[0-9]+$ L(q) ops/s r/s kBps ms/r w/s kBps ms/w %busy Name 0 0 0 0 0.0 0 0 0.0 0.0 da0 0 0 0 0 0.0 0 0 0.0 0.0 da1 0 0 0 0 0.0 0 0 0.0 0.0 da2 0 0 0 0 0.0 0 0 0.0 0.0 da3 0 0 0 0 0.0 0 0 0.0 0.0 da4 0 0 0 0 0.0 0 0 0.0 0.0 da5 0 0 0 0 0.0 0 0 0.0 0.0 da6 0 0 0 0 0.0 0 0 0.0 0.0 da7 0 0 0 0 0.0 0 0 0.0 0.0 da8 0 0 0 0 0.0 0 0 0.0 0.0 da9 0 0 0 0 0.0 0 0 0.0 0.0 da10 0 94 0 0 0.0 88 603 1.7 4.6 da11 0 92 0 0 0.0 86 603 1.8 4.5 da12 3 59 0 0 0.0 55 541 3.1 4.5 da13 4 60 0 0 0.0 56 541 3.2 4.5 da14 Fri Jan 10 08:22:40 CET 2014 dT: 1.073s w: 1.000s filter: da[0-9]+$ L(q) ops/s r/s kBps ms/r w/s kBps ms/w %busy Name 0 0 0 0 0.0 0 0 0.0 0.0 da0 0 0 0 0 0.0 0 0 0.0 0.0 da1 0 0 0 0 0.0 0 0 0.0 0.0 da2 0 0 0 0 0.0 0 0 0.0 0.0 da3 0 0 0 0 0.0 0 0 0.0 0.0 da4 0 88 0 0 0.0 82 568 2.0 4.6 da5 0 87 0 0 0.0 81 568 2.0 4.5 da6 0 0 0 0 0.0 0 0 0.0 0.0 da7 0 0 0 0 0.0 0 0 0.0 0.0 da8 0 86 0 0 0.0 80 568 2.1 4.7 da9 0 86 0 0 0.0 80 568 2.5 5.3 da10 0 0 0 0 0.0 0 0 0.0 0.0 da11 0 0 0 0 0.0 0 0 0.0 0.0 da12 0 0 0 0 0.0 0 0 0.0 0.0 da13 0 0 0 0 0.0 0 0 0.0 0.0 da14 Fri Jan 10 08:22:43 CET 2014 dT: 1.035s w: 1.000s filter: da[0-9]+$ L(q) ops/s r/s kBps ms/r w/s kBps ms/w %busy Name 0 0 0 0 0.0 0 0 0.0 0.0 da0 0 0 0 0 0.0 0 0 0.0 0.0 da1 0 0 0 0 0.0 0 0 0.0 0.0 da2 0 0 0 0 0.0 0 0 0.0 0.0 da3 0 0 0 0 0.0 0 0 0.0 0.0 da4 0 0 0 0 0.0 0 0 0.0 0.0 da5 0 0 0 0 0.0 0 0 0.0 0.0 da6 0 86 0 0 0.0 80 588 3.4 7.3 da7 0 85 0 0 0.0 79 588 3.5 7.6 da8 0 0 0 0 0.0 0 0 0.0 0.0 da9 0 0 0 0 0.0 0 0 0.0 0.0 da10 0 0 0 0 0.0 0 0 0.0 0.0 da11 0 0 0 0 0.0 0 0 0.0 0.0 da12 0 0 0 0 0.0 0 0 0.0 0.0 da13 0 0 0 0 0.0 0 0 0.0 0.0 da14 ^C FreeBSD 10.0-BETA1 #5 r256751 # zpool status pool: data1 state: ONLINE scan: none requested config: NAME STATE READ WRITE CKSUM data1 ONLINE 0 0 0 mirror-0 ONLINE 0 0 0 da1 ONLINE 0 0 0 da2 ONLINE 0 0 0 errors: No known data errors pool: data2 state: ONLINE scan: none requested config: NAME STATE READ WRITE CKSUM data2 ONLINE 0 0 0 mirror-0 ONLINE 0 0 0 da3 ONLINE 0 0 0 da4 ONLINE 0 0 0 errors: No known data errors pool: data3 state: ONLINE scan: none requested config: NAME STATE READ WRITE CKSUM data3 ONLINE 0 0 0 mirror-0 ONLINE 0 0 0 da5 ONLINE 0 0 0 da6 ONLINE 0 0 0 errors: No known data errors pool: data4 state: ONLINE scan: none requested config: NAME STATE READ WRITE CKSUM data4 ONLINE 0 0 0 mirror-0 ONLINE 0 0 0 da7 ONLINE 0 0 0 da8 ONLINE 0 0 0 errors: No known data errors pool: data5 state: ONLINE scan: none requested config: NAME STATE READ WRITE CKSUM data5 ONLINE 0 0 0 mirror-0 ONLINE 0 0 0 da9 ONLINE 0 0 0 da10 ONLINE 0 0 0 errors: No known data errors pool: data6 state: ONLINE scan: none requested config: NAME STATE READ WRITE CKSUM data6 ONLINE 0 0 0 mirror-0 ONLINE 0 0 0 da11 ONLINE 0 0 0 da12 ONLINE 0 0 0 errors: No known data errors pool: data7 state: ONLINE scan: none requested config: NAME STATE READ WRITE CKSUM data7 ONLINE 0 0 0 mirror-0 ONLINE 0 0 0 da13 ONLINE 0 0 0 da14 ONLINE 0 0 0 errors: No known data errors