Date: Wed, 9 May 2001 19:51:05 -0700 (PDT) From: Dan Phoenix <dphoenix@bravenet.com> To: freebsd-hackers@freebsd.org Subject: vinum on 2 ide drives? Message-ID: <Pine.BSO.4.21.0105091950450.7249-100000@gandalf.bravenet.com>
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These 2 are from running it on each on the ide drives without vinum.
[root@gorbag /mnt1]# dd if=/dev/zero of=bigfile bs=16384k count=1000
1000+0 records in
1000+0 records out
16777216000 bytes transferred in 799.865832 secs (20975038 bytes/sec)
[root@gorbag /mnt2]# dd if=/dev/zero of=bigfile bs=16384k count=1000
1000+0 records in
1000+0 records out
16777216000 bytes transferred in 796.395885 secs (21066427 bytes/sec)
[root@gorbag /mnt2]#
This is from running it on both drives striped with vinum.
[root@gorbag /backup]# dd if=/dev/zero of=bigfile bs=16384k count=1000
1000+0 records in
1000+0 records out
16777216000 bytes transferred in 1365.405607 secs (12287350 bytes/sec)
[root@gorbag /backup]#
seems to be quite abit slower..
now i was running systat -vm 1 while writing to the striped vinum drive
and did see both of them getting hit equally. IN this case prob at around
99% IO on both of them half the time.
[root@gorbag dphoenix]# cat /etc/vinum.conf
drive ibm1 device /dev/ad1s1e
drive ibm2 device /dev/ad2s1e
volume stripe
plex org striped 512s
sd length 58643m drive ibm1
sd length 58643m drive ibm2
[root@gorbag dphoenix]#
ad1: 58644MB <IBM-DTLA-307060> [119150/16/63] at ata0-slave UDMA33
ad2: 58644MB <IBM-DTLA-307060> [119150/16/63] at ata1-master UDMA33
As you can see these are 2 ide drives with 58643 Megs each. Well you can
see that with fdisk anyhow...fdisk seems to be 1 meg less than what dmesg
reports.
Any suggestions to get some speed here? Or should i just go back to single
ide drives split up again?
--
Dan
+------------------------------------------------------+
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|make installkernel KERNCONF=MYKERNEL;make installworld|
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