Re: RE Tuning for performance

[Cyrille Bollu]

Joshua Baker-LePain <[EMAIL PROTECTED]> a écrit sur 22/08/2006 15:15:34 :

> On Tue, 22 Aug 2006 at 9:36am, Cyrille Bollu wrote
>
> > [EMAIL PROTECTED] a écrit sur 21/08/2006 18:10:56 :
> >>
> >> What RAID controller?  Have you benchmarked the array itself with
> >> something like bonnie++ or tiobench?
> >
> > A Dell PowerEdge Expandable RAID Controller 4e/Di.
> >
> > Yes I benchmarked it using iozone but could not get meaningfull results.
>
> Grab bonnie++ from <http://www.coker.com.au/bonnie++/> and throw it at the
> array.  It's very easy to use and gives some quite basic numbers.  The
> ones you're interested in are sequential read and sequential write.
>

[EMAIL PROTECTED] bonnie++-1.03a]# ./bonnie++ -u 0
(snip)
Version  1.03       ------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
srv-fhq-bkp.fed 16G 36522  95 120980  60 58116  21 17956  49 56374  27 431.1   0
                    ------Sequential Create------ --------Random Create--------
                    -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
              files  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP
                 16  1680  60 +++++ +++ +++++ +++  2846  99 +++++ +++  9810  99
srv-fhq-bkp.fedasil.be,16G,36522,95,120980,60,58116,21,17956,49,56374,27,431.1,0,16,1680,60,+++++,+++,+++++,+++,2846,99,+++++,+++,9810,99
[EMAIL PROTECTED] bonnie++-1.03a]#

Does that speaks to you?

I see bad sequential input with getc but good (better than what I get with Amanda) block sequential input.

I have no idea whether 431 random seek/sec is good or not.

Cyrille