Date: Mon, 15 Apr 1996 00:13:50 +0100 From: "Gary Palmer" <gpalmer@FreeBSD.ORG> To: "Marc G. Fournier" <scrappy@ki.net> Cc: nash@mcs.com, hackers@FreeBSD.ORG Subject: Re: Unices are created equal, but... Message-ID: <1061.829523630@palmer.demon.co.uk> In-Reply-To: Your message of "Sun, 14 Apr 1996 18:48:36 EDT." <Pine.BSI.3.92.960414184638.22378G-100000@ki.net>
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"Marc G. Fournier" wrote in message ID
<Pine.BSI.3.92.960414184638.22378G-100000@ki.net>:
> IOZONE performance measurements:
> 2155321 bytes/second for writing the file
> 2092693 bytes/second for reading the file
> (ncr0:0:0): "QUANTUM FIREBALL1280S 630C" type 0 fixed SCSI 2
> sd0(ncr0:0:0): Direct-Access
> sd0(ncr0:0:0): FAST SCSI-2 100ns (10 Mb/sec) offset 8.
That's weird:
Disk 0:
(ahc0:0:0): "CONNER CFP1060S 1.05GB 1823" type 0 fixed SCSI 2
sd0(ahc0:0:0): Direct-Access
sd0(ahc0:0:0): 1013MB (2074880 512 byte sectors)
iozone 32
IOZONE: Performance Test of Sequential File I/O -- V2.01 (10/21/94)
By Bill Norcott
Operating System: FreeBSD 2.x -- using fsync()
Send comments to: b_norcott@xway.com
IOZONE writes a 32 Megabyte sequential file consisting of
65536 records which are each 512 bytes in length.
It then reads the file. It prints the bytes-per-second
rate at which the computer can read and write files.
Writing the 32 Megabyte file, 'iozone.tmp'...15.546875 seconds
Reading the file...10.906250 seconds
IOZONE performance measurements:
2158275 bytes/second for writing the file
3076624 bytes/second for reading the file
Disk 1:
(ahc0:1:0): "FUJITSU M1603S-512 6404" type 0 fixed SCSI 2
sd1(ahc0:1:0): Direct-Access
sd1(ahc0:1:0): 519MB (1064268 512 byte sectors)
IOZONE: Performance Test of Sequential File I/O -- V2.01 (10/21/94)
By Bill Norcott
Operating System: FreeBSD 2.x -- using fsync()
Send comments to: b_norcott@xway.com
IOZONE writes a 32 Megabyte sequential file consisting of
65536 records which are each 512 bytes in length.
It then reads the file. It prints the bytes-per-second
rate at which the computer can read and write files.
Writing the 32 Megabyte file, 'iozone.tmp'...15.367188 seconds
Reading the file...9.437500 seconds
IOZONE performance measurements:
2183511 bytes/second for writing the file
3555436 bytes/second for reading the file
In both cases, it was at least 42% faster for reading than writing...
Gary
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