Date: Wed, 4 Aug 2010 22:14:24 +0800 From: "Alex V. Petrov" <alexvpetrov@gmail.com> To: "Stefan Huerter" <maulwurf@guckux.de> Cc: freebsd-stable@freebsd.org Subject: Re: zpool - low speed write Message-ID: <201008042214.25335.alexvpetrov@gmail.com> In-Reply-To: <3511.195.185.213.162.1280927363.squirrel@artif-webmail.de> References: <201008042008.25679.alexvpetrov@gmail.com> <3511.195.185.213.162.1280927363.squirrel@artif-webmail.de>
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=D0=92 =D1=81=D0=BE=D0=BE=D0=B1=D1=89=D0=B5=D0=BD=D0=B8=D0=B8 =D0=BE=D1=82 =
4 =D0=B0=D0=B2=D0=B3=D1=83=D1=81=D1=82=D0=B0 2010 21:09:23 =D0=B2=D1=8B =D0=
=BD=D0=B0=D0=BF=D0=B8=D1=81=D0=B0=D0=BB=D0=B8:
> Guckux Alex
>=20
> The first output of zpool iostat shows you only a statistical output for a
> specific time (unknown to me now).
> Have you tried s.th. like:
> zpool iostat -v 10 10
> shows you the first statistic summary, followed 9 output with 10sec delay
> and a statistic average to the last output.
>=20
Result for 1 proces copying (Krusader)
single HDD to pool
zpool iostat -v 10 10
capacity operations bandwidth
pool used avail read write read write
=2D--------- ----- ----- ----- ----- ----- -----
tank 1,91T 826G 98 5 12,0M 206K
ada4 599G 332G 30 1 3,69M 74,4K
ada2 634G 294G 31 1 3,90M 72,5K
ada3 728G 200G 36 1 4,44M 59,6K
=2D--------- ----- ----- ----- ----- ----- -----
capacity operations bandwidth
pool used avail read write read write
=2D--------- ----- ----- ----- ----- ----- -----
tank 1,91T 826G 0 172 0 7,96M
ada4 599G 332G 0 58 0 2,88M
ada2 634G 294G 0 58 0 2,70M
ada3 728G 200G 0 55 0 2,38M
=2D--------- ----- ----- ----- ----- ----- -----
capacity operations bandwidth
pool used avail read write read write
=2D--------- ----- ----- ----- ----- ----- -----
tank 1,91T 826G 0 166 0 8,06M
ada4 599G 332G 0 56 0 2,99M
ada2 634G 294G 0 56 0 2,81M
ada3 728G 200G 0 53 0 2,26M
=2D--------- ----- ----- ----- ----- ----- -----
capacity operations bandwidth
pool used avail read write read write
=2D--------- ----- ----- ----- ----- ----- -----
tank 1,91T 826G 0 162 0 7,61M
ada4 599G 332G 0 54 0 2,64M
ada2 634G 294G 0 56 0 2,80M
ada3 728G 200G 0 52 0 2,18M
=2D--------- ----- ----- ----- ----- ----- -----
capacity operations bandwidth
pool used avail read write read write
=2D--------- ----- ----- ----- ----- ----- -----
tank 1,91T 826G 0 145 0 6,27M
ada4 599G 332G 0 47 0 2,14M
ada2 634G 294G 0 51 0 2,29M
ada3 728G 200G 0 46 0 1,84M
=2D--------- ----- ----- ----- ----- ----- -----
capacity operations bandwidth
pool used avail read write read write
=2D--------- ----- ----- ----- ----- ----- -----
tank 1,91T 826G 0 130 0 6,37M
ada4 599G 332G 0 45 0 2,52M
ada2 634G 294G 0 44 0 2,09M
ada3 728G 200G 0 40 0 1,77M
=2D--------- ----- ----- ----- ----- ----- -----
capacity operations bandwidth
pool used avail read write read write
=2D--------- ----- ----- ----- ----- ----- -----
tank 1,92T 826G 0 143 0 6,68M
ada4 599G 332G 0 48 0 2,43M
ada2 634G 294G 0 49 0 2,39M
ada3 728G 200G 0 45 0 1,86M
=2D--------- ----- ----- ----- ----- ----- -----
capacity operations bandwidth
pool used avail read write read write
=2D--------- ----- ----- ----- ----- ----- -----
tank 1,92T 826G 0 147 0 7,03M
ada4 599G 332G 0 49 0 2,63M
ada2 634G 294G 0 49 0 2,39M
ada3 728G 200G 0 48 0 2,02M
=2D--------- ----- ----- ----- ----- ----- -----
capacity operations bandwidth
pool used avail read write read write
=2D--------- ----- ----- ----- ----- ----- -----
tank 1,92T 826G 0 176 0 7,61M
ada4 599G 332G 0 58 0 2,89M
ada2 634G 294G 0 60 0 2,61M
ada3 728G 200G 0 56 0 2,10M
=2D--------- ----- ----- ----- ----- ----- -----
capacity operations bandwidth
pool used avail read write read write
=2D--------- ----- ----- ----- ----- ----- -----
tank 1,92T 826G 0 142 0 7,27M
ada4 599G 332G 0 47 0 2,54M
ada2 634G 294G 0 50 0 2,67M
ada3 728G 200G 0 45 0 2,06M
=2D--------- ----- ----- ----- ----- ----- -----
In time=20
dd if=3D/dev/zero of=3D/tank/test.zero bs=3D3M count=3D1000
1000+0 records in
1000+0 records out
3145728000 bytes transferred in 91.863862 secs (34243368 bytes/sec)
zpool iostat -v 10 10
capacity operations bandwidth
pool used avail read write read write
=2D--------- ----- ----- ----- ----- ----- -----
tank 1,92T 824G 98 5 12,0M 239K
ada4 599G 332G 30 1 3,68M 86,4K
ada2 635G 293G 31 1 3,89M 84,0K
ada3 729G 199G 36 1 4,43M 69,0K
=2D--------- ----- ----- ----- ----- ----- -----
capacity operations bandwidth
pool used avail read write read write
=2D--------- ----- ----- ----- ----- ----- -----
tank 1,92T 825G 4 220 320K 15,5M
ada4 599G 332G 1 76 128K 5,56M
ada2 635G 293G 1 74 115K 5,45M
ada3 728G 200G 1 69 76,7K 4,44M
=2D--------- ----- ----- ----- ----- ----- -----
capacity operations bandwidth
pool used avail read write read write
=2D--------- ----- ----- ----- ----- ----- -----
tank 1,92T 824G 0 511 6,39K 34,0M
ada4 599G 332G 0 173 6,39K 12,1M
ada2 635G 293G 0 175 0 12,0M
ada3 728G 200G 0 162 0 9,95M
=2D--------- ----- ----- ----- ----- ----- -----
capacity operations bandwidth
pool used avail read write read write
=2D--------- ----- ----- ----- ----- ----- -----
tank 1,92T 824G 0 491 0 30,1M
ada4 599G 332G 0 169 0 11,1M
ada2 635G 293G 0 165 0 10,2M
ada3 728G 200G 0 156 0 8,67M
=2D--------- ----- ----- ----- ----- ----- -----
capacity operations bandwidth
pool used avail read write read write
=2D--------- ----- ----- ----- ----- ----- -----
tank 1,92T 824G 0 578 19,2K 38,6M
ada4 600G 331G 0 194 0 13,5M
ada2 635G 293G 0 200 6,39K 14,0M
ada3 729G 199G 0 183 12,8K 11,1M
=2D--------- ----- ----- ----- ----- ----- -----
capacity operations bandwidth
pool used avail read write read write
=2D--------- ----- ----- ----- ----- ----- -----
tank 1,92T 823G 0 647 6,39K 42,6M
ada4 600G 331G 0 223 0 15,6M
ada2 635G 293G 0 219 6,39K 14,8M
ada3 729G 199G 0 204 0 12,2M
=2D--------- ----- ----- ----- ----- ----- -----
capacity operations bandwidth
pool used avail read write read write
=2D--------- ----- ----- ----- ----- ----- -----
tank 1,92T 823G 0 513 6,39K 29,0M
ada4 600G 331G 0 176 0 10,6M
ada2 635G 293G 0 176 6,39K 10,4M
ada3 729G 199G 0 161 0 8,02M
=2D--------- ----- ----- ----- ----- ----- -----
capacity operations bandwidth
pool used avail read write read write
=2D--------- ----- ----- ----- ----- ----- -----
tank 1,92T 823G 0 693 12,8K 38,7M
ada4 600G 331G 0 239 6,39K 14,1M
ada2 636G 292G 0 232 6,39K 13,7M
ada3 729G 199G 0 221 0 11,0M
=2D--------- ----- ----- ----- ----- ----- -----
capacity operations bandwidth
pool used avail read write read write
=2D--------- ----- ----- ----- ----- ----- -----
tank 1,92T 822G 0 534 0 30,4M
ada4 600G 331G 0 179 0 10,7M
ada2 636G 292G 0 183 0 11,0M
ada3 729G 199G 0 171 0 8,73M
=2D--------- ----- ----- ----- ----- ----- -----
capacity operations bandwidth
pool used avail read write read write
=2D--------- ----- ----- ----- ----- ----- -----
tank 1,92T 822G 0 465 0 23,8M
ada4 600G 331G 0 157 0 8,66M
ada2 636G 292G 0 156 0 8,22M
ada3 729G 199G 0 150 0 6,92M
=2D--------- ----- ----- ----- ----- ----- -----
=2D----
Alex V. Petrov
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