Date: Wed, 4 Aug 2010 20:08:24 +0800 From: "Alex V. Petrov" <alexvpetrov@gmail.com> To: freebsd-stable@freebsd.org Subject: zpool - low speed write Message-ID: <201008042008.25679.alexvpetrov@gmail.com>
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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 iostat -v
capacity operations bandwidth
pool used avail read write read write
---------- ----- ----- ----- ----- ----- -----
tank 1,91T 829G 101 4 12,4M 148K
ada4 597G 334G 31 1 3,81M 53,4K
ada2 633G 295G 32 1 4,03M 51,8K
ada3 727G 201G 37 1 4,59M 42,9K
---------- ----- ----- ----- ----- ----- -----
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"
vfs.zfs.prefetch_disable=0
vfs.zfs.cache_flush_disable=1
vfs.zfs.zil_disable=1
Any ideas?
-----
Alex V. Petrov
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