Date: Tue, 10 Aug 2010 18:37:17 +0800 From: "Alex V. Petrov" <alexvpetrov@gmail.com> To: freebsd-fs@freebsd.org Subject: zpool - low speed write (moved from freebsd-stable) Message-ID: <201008101837.17311.alexvpetrov@gmail.com>
next in thread | raw e-mail | index | archive | help
Hi All!
$ dd if=/dev/random of=/tank/test bs=3M count=1000
1000+0 records in
1000+0 records out
3145728000 bytes transferred in 298.153293 secs (10550707 bytes/sec)
What, i think, very-very low :-(
FreeBSD alex.super 8.1-STABLE FreeBSD 8.1-STABLE #76: Mon Aug 2 20:19:09
KRAST 2010 alex@alex.super:/usr/obj/usr/src/sys/ALEX amd64
real memory = 4294967296 (4096 MB)
avail memory = 4098732032 (3908 MB)
zpool status -v
pool: tank
state: ONLINE
scrub: scrub completed after 7h12m with 0 errors on Tue Aug 3 04:54:14 2010
config:
NAME STATE READ WRITE CKSUM
tank ONLINE 0 0 0
ada4 ONLINE 0 0 0
ada2 ONLINE 0 0 0
ada3 ONLINE 0 0 0
errors: No known data errors
zpool history
History for 'tank':
2009-07-16.19:46:24 zpool create tank ad12
2009-12-13.14:58:46 zpool add tank ad8
2010-04-24.01:59:41 zpool upgrade tank
2010-05-09.02:16:34 zpool add tank ada3
2010-05-25.17:57:12 zpool scrub tank
2010-06-27.16:02:45 zpool scrub tank
2010-08-02.21:41:53 zpool scrub tank
ada2 at ahcich2 bus 0 scbus2 target 0 lun 0
ada2: <WDC WD10EADS-00M2B0 01.00A01> ATA-8 SATA 2.x device
ada2: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
ada2: Command Queueing enabled
ada2: 953869MB (1953525168 512 byte sectors: 16H 63S/T 16383C)
ada3 at ahcich3 bus 0 scbus3 target 0 lun 0
ada3: <WDC WD10EADS-00L5B1 01.01A01> ATA-8 SATA 2.x device
ada3: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
ada3: Command Queueing enabled
ada3: 953869MB (1953525168 512 byte sectors: 16H 63S/T 16383C)
ada4 at ahcich4 bus 0 scbus4 target 0 lun 0
ada4: <WDC WD10EADS-00M2B0 01.00A01> ATA-8 SATA 2.x device
ada4: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
ada4: Command Queueing enabled
smartd daily output:
Checking health of /dev/ada2: OK
Checking health of /dev/ada3: OK
Checking health of /dev/ada4: OK
/boot/loader.conf:
ahci_load="YES"
sem_load="YES"
snd_hda_load="YES"
nvidia_load="YES"
linux_load="YES"
wlan_xauth_load="YES"
vboxdrv_load="YES"
atapicam_load="YES"
coretemp_load="YES"
aio_load="YES"
****************************************
Next without "ahci_load="YES""
zpool destroy tank
zpool create tank ad8 ad10 ad12
dd if=/dev/zero of=/tank/test.zero bs=3M count=1000
1000+0 records in
1000+0 records out
3145728000 bytes transferred in 83.219741 secs (37800262 bytes/sec)
zpool offline tank ad10
cannot offline ad10: no valid replicas
zpool destroy tank
zpool create tank ad8 ad12
dd if=/dev/zero of=/tank/test.zero bs=3M count=1000
1000+0 records in
1000+0 records out
3145728000 bytes transferred in 126.873102 secs (24794286 bytes/sec)
dd if=/dev/zero of=/tank/test.zero bs=64k count=1000000
1000000+0 records in
1000000+0 records out
65536000000 bytes transferred in 1735.680273 secs (37758106 bytes/sec)
zpool destroy tank
zpool create tank ad8
dd if=/dev/zero of=/tank/test.zero bs=3M count=1000
1000+0 records in
1000+0 records out
3145728000 bytes transferred in 39.550739 secs (79536517 bytes/sec)
dd if=/dev/zero of=/tank/test.zero bs=64k count=100000
100000+0 records in
100000+0 records out
6553600000 bytes transferred in 90.810344 secs (72167990 bytes/sec)
1-disk zpool faster multy-disks?
****************************************
zpool destroy tank
At one time 3 dd
dd if=/dev/zero of=/dev/ad8 bs=64k count=1000000
1000000+0 records in
1000000+0 records out
65536000000 bytes transferred in 605.173955 secs (108292830 bytes/sec)
dd if=/dev/zero of=/dev/ad10 bs=64k count=1000000
1000000+0 records in
1000000+0 records out
65536000000 bytes transferred in 759.946393 secs (86237662 bytes/sec)
dd if=/dev/zero of=/dev/ad12 bs=64k count=1000000
1000000+0 records in
1000000+0 records out
65536000000 bytes transferred in 605.139062 secs (108299074 bytes/sec)
Disks ad4 ad6 ad8 ad10 ad12 da0 da1
KB/t 0,00 16,00 64,00 64,00 64,00 0,00 0,00
tps 0 1 1667 1329 1646 0 0
MB/s 0,00 0,02 104 83,04 103 0,00 0,00
%busy 0 0 93 94 93 0 0
ie this problem is not the controller
-----
Alex V. Petrov
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201008101837.17311.alexvpetrov>