Date: Mon, 16 Feb 2009 21:35:38 -0800 From: Rudy <crapsh@monkeybrains.net> To: FreeBSD Questions <freebsd-questions@freebsd.org> Subject: How do I see disk IO for specific ZFS file systems? Message-ID: <499A4CAA.7010805@monkeybrains.net>
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I realize I can see per device iostats with zpool or gstat, but I am interested in specific mount points. Is that possible? What are the read/writes for "/tank/BBB.monkeybrains.net"? The READS are low and then jump to a higher value and I'm trying to track it down. READ/WRITE over past 6 months: http://www.monkeybrains.net/images/IO-past-6months.png # zfs list NAME USED AVAIL REFER MOUNTPOINT tank 73.1G 368G 39K /tank tank/AAA.monkeybrains.net 2.54G 7.46G 2.45G /tank/AAA.monkeybrains.net tank/BBB.monkeybrains.net 2.64G 97.4G 2.64G /tank/BBB.monkeybrains.net tank/CCC.monkeybrains.net 1.39G 98.6G 1.39G /tank/CCC.monkeybrains.net # zpool iostat -v capacity operations bandwidth pool used avail read write read write ---------- ----- ----- ----- ----- ----- ----- tank 67.5G 380G 12 34 446K 257K mirror 67.5G 380G 12 34 446K 257K ad0s2 - - 3 17 276K 258K ad8s2 - - 3 17 256K 258K ---------- ----- ----- ----- ----- ----- ----- # gstat dT: 1.001s w: 1.000s L(q) ops/s r/s kBps ms/r w/s kBps ms/w %busy Name 0 29 6 456 6.1 22 338 2.3 21.7| ad0 0 31 8 615 9.8 22 338 2.3 19.2| ad8 0 26 5 392 4.6 21 318 2.5 3.1| ad0s1 0 3 1 64 13.6 1 20 2.3 19.4| ad0s2 0 26 5 392 10.5 21 318 2.5 5.8| ad8s1 0 5 3 224 8.7 1 20 0.3 16.9| ad8s2 specifically, I am intested in the file systems in ad0s2 and ad8s2. Thanks if you can point me in the right direction, and thanks if you read this far! Rudy
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