From: raid@ddx.a2000.nu
To: Adam Radford <aradford@3WARE.com>
Cc: linux-raid@vger.kernel.org
Subject: RE: 3ware 7500-12, bad write speed
Date: Sat, 12 Oct 2002 00:03:26 +0200 (CEST) [thread overview]
Message-ID: <Pine.LNX.4.44.0210120001500.29225-100000@ddx.a2000.nu> (raw)
In-Reply-To: <A1964EDB64C8094DA12D2271C04B812672C771@tabby>
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
>
>
> -
> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
>
next parent reply other threads:[~2002-10-11 22:03 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <A1964EDB64C8094DA12D2271C04B812672C771@tabby>
2002-10-11 22:03 ` raid [this message]
2002-10-11 22:05 ` 3ware 7500-12, bad write speed raid
2002-10-14 18:08 Adam Radford
-- strict thread matches above, loose matches on Subject: below --
2002-09-26 17:50 Adam Radford
2002-09-25 21:12 Adam Radford
2002-09-26 5:25 ` Mikael Abrahamsson
2002-09-26 6:04 ` dean gaudet
2002-09-25 20:43 Mikael Abrahamsson
2002-09-26 4:23 ` Maurice Hilarius
2002-09-26 6:43 ` Jason
2002-10-10 21:18 ` raid
2002-10-10 22:27 ` Mikael Abrahamsson
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=Pine.LNX.4.44.0210120001500.29225-100000@ddx.a2000.nu \
--to=raid@ddx.a2000.nu \
--cc=aradford@3WARE.com \
--cc=linux-raid@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox