Date: Mon, 18 Mar 2013 20:32:32 +0100 From: Davide D'Amico <davide.damico@contactlab.com> To: Steven Hartland <killing@multiplay.co.uk> Cc: freebsd-fs@freebsd.org Subject: Re: FreBSD 9.1 and ZFS v28 performances Message-ID: <13317bbd289c4c828f134e2c2592a2d7@sys.tomatointeractive.it> In-Reply-To: <897DB64CEBAF4F04AE9C76B3F686E497@multiplay.co.uk> References: <514729BD.2000608@contactlab.com> <810E5C08C2D149DBAC94E30678234995@multiplay.co.uk> <51473D1D.3050306@contactlab.com> <1DD6360145924BE0ABF2D0979287F5F4@multiplay.co.uk> <51474F2F.5040003@contactlab.com> <E106A7DB08744581A08C610BD8A86560@multiplay.co.uk> <51475267.1050204@contactlab.com> <514757DD.9030705@contactlab.com> <42B9D942BA134E16AFDDB564858CA007@multiplay.co.uk> <1bfdea0efb95a7e06554dadf703d58e7@sys.tomatointeractive.it> <897DB64CEBAF4F04AE9C76B3F686E497@multiplay.co.uk>
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Il 18.03.2013 20:28 Steven Hartland ha scritto: > ----- Original Message ----- From: "Davide D'Amico" > <davide.damico@contactlab.com> >>> How does ZFS compare if you do it on 1 SSD as per your second >>> UFS test? As I'm wondering the mfi cache is kicking in? >> Well, it was a test :) >> The MFI cache is enabled because I am using mfid* as jbod (mfiutil >> create jbod mfid3 mfid4 mfid5 mfid6): > > Don't use mfiutil to do this it doesnt work it creates mirrors. > > Use MegaCli instead to create real jbods e.g. > MegaCli -AdpSetProp -EnableJBOD -1 -aALL > Ok, I'll give it a try (never used, I thought it has been dismissed), and I'll let you know. >> And the result from sysbench: >> General statistics: >> total time: 82.9567s >> total number of events: 1 >> total time taken by event execution: 82.9545s > > Thats hardly doing any disk access at all, so odd it would be doubling > your benchmark time. > >> Using a SSD: >> # iostat mfid2 -x 2 >> tty mfid2 cpu >> tin tout KB/t tps MB/s us ni sy in id >> 0 32 125.21 31 3.84 0 0 0 0 99 [...] >> 0 585 0.00 0 0.00 3 0 1 0 96 >> 0 22 4.00 0 0.00 0 0 0 0 100 >> And the result from sysbench: >> General statistics: >> total time: 36.1146s >> total number of events: 1 >> total time taken by event execution: 36.1123s >> That are the same results using SAS disks. > > So this is ZFS on the SSD, resulting the same benchmark results as > UFS? This is UFS on SSD, that has the same behaviour than UFS on RAID10 HW on SAS drives. d.
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