Date: Sat, 29 Jan 2005 00:22:14 -0500 From: Mike Tancsa <mike@sentex.net> To: Robert Watson <rwatson@FreeBSD.org> Cc: jeff@FreeBSD.org Subject: Re: FreeBSD 5.3 I/O Performance / Linux 2.6.10 | Continued Discussion Message-ID: <6.2.0.14.0.20050128200200.0860ddf8@64.7.153.2> In-Reply-To: <Pine.NEB.3.96L.1050129004326.82911C-100000@fledge.watson.o rg> References: <6.2.0.14.0.20050128145435.098e3d48@64.7.153.2> <Pine.NEB.3.96L.1050129004326.82911C-100000@fledge.watson.org>
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At 07:49 PM 28/01/2005, Robert Watson wrote: >On Fri, 28 Jan 2005, Mike Tancsa wrote: > > > At 04:52 AM 28/01/2005, Robert Watson wrote: > > > > >Just to get started, using dd to read and write at various block sizes is > > >probably a decent start. Take a few samples, make sure there's a decent > > >sample size, etc, and don't count the first couple of runs. > > > > > > I started over and installed the OS on a separate drive, so that the > > RAID5 partition was one big partition. Bonnie seems fairly equal on the > > 2 platforms. I am just putting together all the IOZONE tests as well > > which I will post later tonight / over the weekend. > >The basic I/O results are encouraging. Could you remind me which storage >controller you're using? Hi, 3ware 8605 with 4 SATA drives in RAID5. >For postmark, could you try running the test against a partition with the >async flag set, but no soft updates turned on? OK [nfs]# newfs /dev/twed0s1d /dev/twed0s1d: 715418.0MB (1465176132 sectors) block size 16384, fragment size 2048 using 3894 cylinder groups of 183.77MB, 11761 blks, 23552 inodes. super-block backups (for fsck -b #) at: [nfs]# mount -o async /dev/twed0s1d /mnt [nfs]# mount /dev/ad0s1a on / (ufs, local) devfs on /dev (devfs, local) /dev/ad0s1e on /tmp (ufs, local, soft-updates) /dev/ad0s1d on /usr (ufs, local, soft-updates) /dev/ad0s1f on /var (ufs, local, soft-updates) /dev/twed0s1d on /mnt (ufs, asynchronous, NFS exported, local) [nfs]# postmark PostMark v1.5 : 3/27/01 pm>set location /mnt pm>set transactions 400000 pm>set size 300 100000 pm>run Creating files...Done Performing transactions..........Done Deleting files...Done Time: 2427 seconds total 2419 seconds of transactions (165 per second) Files: 200107 created (82 per second) Creation alone: 500 files (250 per second) Mixed with transactions: 199607 files (82 per second) 199905 read (82 per second) 199384 appended (82 per second) 200107 deleted (82 per second) Deletion alone: 889 files (148 per second) Mixed with transactions: 199218 files (82 per second) Data: 12715.55 megabytes read (5.24 megabytes per second) 12728.92 megabytes written (5.24 megabytes per second) pm> No difference it would seem. > Also, could you compare >with the sync flag on both Linux and FreeBSD (again, no soft updates)? Linux was with on ext3, so no such option. ---Mike
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