Mailinglist Archive: opensuse (963 mails)

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Re: [opensuse] Write time performance - slightly out of topic
  • From: Bogdan Cristea <cristeab@xxxxxxxxx>
  • Date: Mon, 15 Nov 2010 19:14:54 +0200
  • Message-id: <AANLkTinbjmyVT3mGOyQWomHMZb07R2Y685AW7DReYuNh@xxxxxxxxxxxxxx>
I have a HP Pavilion Slimline s7605.fr PC. I don't know exactly the
hard disk type, anyway this is not the system I have to use for real
time processing. I have done some preliminary tests to see what should
be set up for a fast disk access.

Thank you everyone for your help.

regards
Bogdan

On Mon, Nov 15, 2010 at 4:59 PM, Ciro Iriarte <cyruspy@xxxxxxxxx> wrote:
2010/11/15 Bogdan Cristea <cristeab@xxxxxxxxx>:
Hi

 I intend to use openSUSE for a real time application which requires to write
from memory to hard disk 330 MB of data continuously in about 2.56 s. When I
write only 330 MB, the write time using Round Robin real-time scheduler is
about 1.5 s, almost two times better than using the default scheduler. If I
use 10 times 330 MB data and then I average the write time I get about 7 s
regardless of the scheduling policy. My first thought is that the disk
defragmentation should be held responsible for such performance penalty.
 Is this the right explanation ? Are there ways to improve the write time
when dealing with large amounts of data ?

thanks
--
Bogdan Cristea
http://sites.google.com/site/cristeab/

Making your disk subsystem faster?, what disks are you using?

Regards,

--
Ciro Iriarte
http://cyruspy.wordpress.com
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Bogdan Cristea
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