Adam,
results after changing these settings
read is faster, but write is still half sw raid speed
Version 1.02c ------Sequential Output------ --Sequential Input-
--Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block--
--Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP
/sec %CP
storagenew.a2000 1G 18240 90 30134 22 12535 6 24634 98 82337 16
468.0 1
------Sequential Create------ --------Random
Create--------
-Create-- --Read--- -Delete-- -Create-- --Read---
-Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
/sec %CP
16 1926 95 +++++ +++ +++++ +++ 1960 97 +++++ +++
5627 99
storagenew.a2000.nu,1G,18240,90,30134,22,12535,6,24634,98,82337,16,468.0,1,16,1926,95,+++++,+++,+++++,+++,1960,97,+++++,+++,5627,99
On Thu, 10 Oct 2002, Adam Radford wrote:
> Can you run the following commands, then re-run your 3ware benchmark and see
> if the results change?
>
> echo "60" > /proc/sys/vm/bdflush
> echo "512" > /proc/sys/vm/max-readahead
> echo "256" > /proc/sys/vm/min-readahead
>
> -Adam
>
> -----Original Message-----
> From: raid@ddx.a2000.nu [mailto:raid@ddx.a2000.nu]
> Sent: Thursday, October 10, 2002 2:18 PM
> To: linux-raid@vger.kernel.org
> Subject: Re: 3ware 7500-12, bad write speed
>
>
> Ok did a benchmark between software raid en hw raid
> controller 3ware 7850 (7500-8 now?) with 5 * WDC 120GB 7200RPM (2mb cache)
> On xeon dual 2GHZ (controller in 64bits pci)
>
> results :
>
> ---raid5 5*120gb sw raid :
>
> Version 1.02c ------Sequential Output------ --Sequential Input-
> --Random-
> -Per Chr- --Block-- -Rewrite- -Per Chr- --Block--
> --Seeks--
> Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP
> /sec %CP
> storagenew.a2000 1G 18850 99 78959 77 29982 29 24052 99 81547 22
> 510.5 2
> ------Sequential Create------ --------Random
> Create--------
> -Create-- --Read--- -Delete-- -Create-- --Read---
> -Delete--
> files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
> /sec %CP
> 16 1933 97 +++++ +++ +++++ +++ 1986 98 +++++ +++
> 5056 98
> storagenew.a2000.nu,1G,18850,99,78959,77,29982,29,24052,99,81547,22,510.5,2,
> 16,1933,97,+++++,+++,+++++,+++,1986,98,+++++,+++,5056,98
>
>
> ---raid5 5*120gb hw raid :
>
> Version 1.02c ------Sequential Output------ --Sequential Input-
> --Random-
> -Per Chr- --Block-- -Rewrite- -Per Chr- --Block--
> --Seeks--
> Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP
> /sec %CP
> storagenew.a2000 1G 17100 85 32250 23 12053 5 22660 91 49603 10
> 466.9 1
> ------Sequential Create------ --------Random
> Create--------
> -Create-- --Read--- -Delete-- -Create-- --Read---
> -Delete--
> files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
> /sec %CP
> 16 1872 93 +++++ +++ +++++ +++ 1976 98 +++++ +++
> 5677 100
> storagenew.a2000.nu,1G,17100,85,32250,23,12053,5,22660,91,49603,10,466.9,1,1
> 6,1872,93,+++++,+++,+++++,+++,1976,98,+++++,+++,5677,100
>
>
> -
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