Date: Thu, 5 Aug 2010 12:47:42 +0800 From: "Alex V. Petrov" <alexvpetrov@gmail.com> To: Jeremy Chadwick <freebsd@jdc.parodius.com> Cc: freebsd-stable@freebsd.org Subject: Re: zpool - low speed write Message-ID: <201008051247.43260.alexvpetrov@gmail.com> In-Reply-To: <20100805041752.GA89285@icarus.home.lan> References: <201008042008.25679.alexvpetrov@gmail.com> <20100805041752.GA89285@icarus.home.lan>
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> Your ada3 disk is different from the other two. Can you please provide
> the output from the following 3 commands?
>
> camcontrol identify ada2
> camcontrol identify ada3
> camcontrol identify ada4
>
> > vfs.zfs.cache_flush_disable=1
> > vfs.zfs.zil_disable=1
>
> I question both of these settings, especially the latter. Please remove
> them both and re-test your write performance.
I removed all settings of zfs.
Now it default.
camcontrol identify ada2
pass2: <WDC WD10EADS-00M2B0 01.00A01> ATA-8 SATA 2.x device
pass2: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
protocol ATA/ATAPI-8 SATA 2.x
device model WDC WD10EADS-00M2B0
firmware revision 01.00A01
serial number WD-WCAV51709425
WWN 50014ee2adf88aae
cylinders 16383
heads 16
sectors/track 63
sector size logical 512, physical 512, offset 0
LBA supported 268435455 sectors
LBA48 supported 1953525168 sectors
PIO supported PIO4
DMA supported WDMA2 UDMA6
Feature Support Enable Value Vendor
read ahead yes yes
write cache yes yes
flush cache yes yes
overlap no
Tagged Command Queuing (TCQ) no no
Native Command Queuing (NCQ) yes 32 tags
SMART yes yes
microcode download yes yes
security yes no
power management yes yes
advanced power management no no 0/0x00
automatic acoustic management yes no 254/0xFE 128/0x80
media status notification no no
power-up in Standby yes no
write-read-verify no no 0/0x0
unload no no
free-fall no no
data set management (TRIM) no
*************
camcontrol identify ada3
pass3: <WDC WD10EADS-00L5B1 01.01A01> ATA-8 SATA 2.x device
pass3: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
protocol ATA/ATAPI-8 SATA 2.x
device model WDC WD10EADS-00L5B1
firmware revision 01.01A01
serial number WD-WCAU4D726772
WWN 50014ee238ab988
cylinders 16383
heads 16
sectors/track 63
sector size logical 512, physical 512, offset 0
LBA supported 268435455 sectors
LBA48 supported 1953525168 sectors
PIO supported PIO4
DMA supported WDMA2 UDMA6
Feature Support Enable Value Vendor
read ahead yes yes
write cache yes yes
flush cache yes yes
overlap no
Tagged Command Queuing (TCQ) no no
Native Command Queuing (NCQ) yes 32 tags
SMART yes yes
microcode download yes yes
security yes no
power management yes yes
advanced power management no no 0/0x00
automatic acoustic management yes no 254/0xFE 128/0x80
media status notification no no
power-up in Standby yes no
write-read-verify no no 0/0x0
unload no no
free-fall no no
data set management (TRIM) no
*************
camcontrol identify ada4
pass4: <WDC WD10EADS-00M2B0 01.00A01> ATA-8 SATA 2.x device
pass4: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
protocol ATA/ATAPI-8 SATA 2.x
device model WDC WD10EADS-00M2B0
firmware revision 01.00A01
serial number WD-WMAV50095864
WWN 50014ee014f3265
cylinders 16383
heads 16
sectors/track 63
sector size logical 512, physical 512, offset 0
LBA supported 268435455 sectors
LBA48 supported 1953525168 sectors
PIO supported PIO4
DMA supported WDMA2 UDMA6
Feature Support Enable Value Vendor
read ahead yes yes
write cache yes yes
flush cache yes yes
overlap no
Tagged Command Queuing (TCQ) no no
Native Command Queuing (NCQ) yes 32 tags
SMART yes yes
microcode download yes yes
security yes no
power management yes yes
advanced power management no no 0/0x00
automatic acoustic management yes no 254/0xFE 128/0x80
media status notification no no
power-up in Standby yes no
write-read-verify no no 0/0x0
unload no no
free-fall no no
data set management (TRIM) no
*************
dd if=/dev/zero of=/tank/test.zero bs=3M count=1000
1000+0 records in
1000+0 records out
3145728000 bytes transferred in 527.727573 secs (5960894 bytes/sec)
During execution dd:
zpool iostat -v 10 10
capacity operations bandwidth
pool used avail read write read write
---------- ----- ----- ----- ----- ----- -----
tank 1,91T 829G 0 48 25,4K 4,35M
ada4 598G 333G 0 16 9,94K 1,56M
ada2 633G 295G 0 16 7,26K 1,54M
ada3 727G 201G 0 14 8,21K 1,25M
---------- ----- ----- ----- ----- ----- -----
capacity operations bandwidth
pool used avail read write read write
---------- ----- ----- ----- ----- ----- -----
tank 1,91T 829G 0 29 0 2,28M
ada4 598G 333G 0 10 0 870K
ada2 633G 295G 0 8 0 774K
ada3 727G 201G 0 9 0 689K
---------- ----- ----- ----- ----- ----- -----
capacity operations bandwidth
pool used avail read write read write
---------- ----- ----- ----- ----- ----- -----
tank 1,91T 829G 0 14 0 91,8K
ada4 598G 333G 0 4 0 25,2K
ada2 633G 295G 0 5 0 28,6K
ada3 727G 201G 0 4 0 38,0K
---------- ----- ----- ----- ----- ----- -----
capacity operations bandwidth
pool used avail read write read write
---------- ----- ----- ----- ----- ----- -----
tank 1,91T 829G 0 19 0 227K
ada4 598G 333G 0 6 0 75,3K
ada2 633G 295G 0 6 0 76,6K
ada3 727G 201G 0 6 0 75,3K
---------- ----- ----- ----- ----- ----- -----
capacity operations bandwidth
pool used avail read write read write
---------- ----- ----- ----- ----- ----- -----
tank 1,91T 829G 0 25 0 2,27M
ada4 598G 333G 0 9 0 877K
ada2 633G 295G 0 8 0 787K
ada3 727G 201G 0 7 0 659K
---------- ----- ----- ----- ----- ----- -----
capacity operations bandwidth
pool used avail read write read write
---------- ----- ----- ----- ----- ----- -----
tank 1,91T 829G 0 29 12,8K 2,51M
ada4 598G 333G 0 11 0 1,07M
ada2 633G 295G 0 9 0 750K
ada3 727G 201G 0 8 12,8K 724K
---------- ----- ----- ----- ----- ----- -----
capacity operations bandwidth
pool used avail read write read write
---------- ----- ----- ----- ----- ----- -----
tank 1,91T 829G 0 37 0 2,53M
ada4 598G 333G 0 12 0 847K
ada2 633G 295G 0 13 0 986K
ada3 727G 201G 0 11 0 759K
---------- ----- ----- ----- ----- ----- -----
capacity operations bandwidth
pool used avail read write read write
---------- ----- ----- ----- ----- ----- -----
tank 1,91T 829G 0 25 0 2,39M
ada4 598G 333G 0 9 0 915K
ada2 633G 295G 0 8 0 900K
ada3 727G 201G 0 7 0 632K
---------- ----- ----- ----- ----- ----- -----
capacity operations bandwidth
pool used avail read write read write
---------- ----- ----- ----- ----- ----- -----
tank 1,91T 829G 0 28 0 1,76M
ada4 598G 333G 0 11 0 919K
ada2 633G 295G 0 7 0 207K
ada3 727G 201G 0 9 0 676K
---------- ----- ----- ----- ----- ----- -----
capacity operations bandwidth
pool used avail read write read write
---------- ----- ----- ----- ----- ----- -----
tank 1,91T 829G 0 26 0 2,16M
ada4 598G 333G 0 10 0 856K
ada2 633G 295G 0 7 0 646K
ada3 727G 201G 0 8 0 711K
---------- ----- ----- ----- ----- ----- -----
-----
Alex V. Petrov
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