lkml.org 
[lkml]   [2003]   [Oct]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: Software RAID5 with 2.6.0-test
Date
Samuel Flory <sflory@rackable.com> writes:

>> What about the RAID controllers in the $400 category? Surely, they
>> must be doing something better than the $50 fakeraid controllers.
>>
>
> Yes, but follow this logic.
>
> 1)You are willing to devote 10% of 2Ghz xeon to software raid.
> 2)A $500+ controller has a 100Mhz proccessor.
>
> Thus just from this you could guess that software raid has x2 as
> many clock cycles availble to it. It's even worse when you realize
> the 2Ghz xeon is a better proccessor in many more ways than just
> clock cycles.

How about this logic:

1) If the processor on the RAID controller can handle the full
bandwidth of the disks, it's fast enough.
2) If someone else does the 10% work, the CPU can do 10% more work.

--
Måns Rullgård
mru@users.sf.net

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:58    [W:0.112 / U:0.448 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site