[ale] "Cost" of raid?

[Robert L. Harris]

Collecting data, doing some calculations on that data then pushing it
and the output to another machine.

Thus spake Jeff Hubbs (hbbs at attbi.com):

> From: Jeff Hubbs <hbbs at attbi.com>
> To: "Robert L. Harris" <Robert.L.Harris at rdlg.net>
> Cc: Atlanta Linux Enthusiasts <ale at ale.org>
> X-Mailer: Evolution/1.0.2-5mdk 
> Date: 26 Sep 2002 16:07:07 -0400
> Subject: Re: [ale] "Cost" of raid?
> 
> Robert -
> 
> What's the machine going to be doing?
> 
> - Jeff
> 
> 
> On Thu, 2002-09-26 at 15:58, Robert L. Harris wrote:
> > 
> > 
> > 
> >   I'm effectively "pricing" raid for a system on our network.  Currently
> > they have 4x18Gig disks, Raid 0 giving them 72Gigs available.  I've done
> > a breakdown of how much disk is available, what will be the effects on
> > space and redundance.  
> > 
> >   One question hit me I'm not sure how to answer though.  How much
> > slower is Raid 5 than a Raid 0+1?  Will it be noticable?  This system is
> > very IO intensive with an average load around 0.8.
> > 
> >   The box is a dual-P3-850 with 4x18Gig SCSI Cheetas.
> > 
> > 
> > :wq!
> > ---------------------------------------------------------------------------
> > Robert L. Harris                
> >                                
> > DISCLAIMER:
> >       These are MY OPINIONS ALONE.  I speak for no-one else.
> > FYI:
> >  perl -e 'print $i=pack(c5,(41*2),sqrt(7056),(unpack(c,H)-2),oct(115),10);'
> > 
> > 
> > ---
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> > sent to listmaster at ale dot org.
> > 
> 
> 
> 
> ---
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:wq!
---------------------------------------------------------------------------
Robert L. Harris                
                               
DISCLAIMER:
      These are MY OPINIONS ALONE.  I speak for no-one else.
FYI:
 perl -e 'print $i=pack(c5,(41*2),sqrt(7056),(unpack(c,H)-2),oct(115),10);'


---
This message has been sent through the ALE general discussion list.
See http://www.ale.org/mailing-lists.shtml for more info. Problems should be 
sent to listmaster at ale dot org.