Date: Wed, 9 May 2001 22:46:43 -0500 From: "Scott Mace" <smace@intt.org> To: "Greg Lehey" <grog@lemis.com>, "Dan Phoenix" <dphoenix@bravenet.com> Cc: "FreeBSD Questions" <questions@FreeBSD.ORG> Subject: RE: vinum on 2 ide drives? Message-ID: <BFENLHFJOCHGGGAHGHOPKEADCCAA.smace@intt.org> In-Reply-To: <20010510125406.I56501@wantadilla.lemis.com>
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I'm seeing the same behaviour with a pair of IBM drives. I even made sure
that
write cache was enabled... I'm using 307030's
This is on a regular non-vinum partition
onix2# iozone 128 8192
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 128 Megabyte sequential file consisting of
16384 records which are each 8192 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 128 Megabyte file, 'iozone.tmp'...6.171875 seconds
Reading the file...4.523438 seconds
IOZONE performance measurements:
21746669 bytes/second for writing the file
29671622 bytes/second for reading the file
This is on a vinum mirror.
onix2# cd /a
onix2# iozone 128 8192
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 128 Megabyte sequential file consisting of
16384 records which are each 8192 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 128 Megabyte file, 'iozone.tmp'...12.445312 seconds
Reading the file...5.492188 seconds
IOZONE performance measurements:
10784600 bytes/second for writing the file
24437936 bytes/second for reading the file
drive vinumdrive0 device /dev/ad0s1e
drive vinumdrive2 device /dev/ad0s1f
drive vinumdrive4 device /dev/ad0s1g
drive vinumdrive1 device /dev/ad1s1e
drive vinumdrive3 device /dev/ad1s1f
drive vinumdrive5 device /dev/ad1s1g
volume mirror0
volume mirror1
volume mirror2
plex name mirror0.p0 org concat vol mirror0
plex name mirror0.p1 org concat vol mirror0
plex name mirror1.p0 org concat vol mirror1
plex name mirror1.p1 org concat vol mirror1
plex name mirror2.p0 org concat vol mirror2
plex name mirror2.p1 org concat vol mirror2
sd name mirror0.p0.s0 drive vinumdrive0 plex mirror0.p0 len 4194039s
driveoffset 265s plexoffset 0s
sd name mirror0.p1.s0 drive vinumdrive1 plex mirror0.p1 len 4194039s
driveoffset 265s plexoffset 0s
sd name mirror1.p0.s0 drive vinumdrive2 plex mirror1.p0 len 4194039s
driveoffset 265s plexoffset 0s
sd name mirror1.p1.s0 drive vinumdrive3 plex mirror1.p1 len 4194039s
driveoffset 265s plexoffset 0s
sd name mirror2.p0.s0 drive vinumdrive4 plex mirror2.p0 len 47453240s
driveoffset 265s plexoffset 0s
sd name mirror2.p1.s0 drive vinumdrive5 plex mirror2.p1 len 47453240s
driveoffset 265s plexoffset 0s
Scott
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