[Mageia-dev] Will this work for a build system?

Michael Scherer misc at zarb.org
Sun Sep 26 11:38:24 CEST 2010

Le samedi 25 septembre 2010 à 20:56 -0700, herman a écrit :
> On Sat, 2010-09-25 at 10:44 -0700, R James wrote:
> > Yeah, if I move the physical server about 2 miles. I can plug it into
> > a better ISP.
> BTW, I once calculated (test plus extrapolation) how long it would take
> to rebuild every package in Mandriva on a low end 2 GHz Celeron server
> that I had available and it came to about 80 days.  
> Usually one won't rebuild every package all in one go, but one has to do
> that the first time.  So, a build system needs to be a big ass piece of
> iron, otherwise it will be frustrating to use.

Well, for the moment, Mandriva has ( for i586 ) 5 servers with 4 core at
2.8 ghz
( fast scsi disk, 2 g of ram ). So by your estimate and using similar
hardware ( which date back to 3/4 years ago ), it would take
80/(5*4*1.5) = 3 days

now, that doesn't take in account several factors, like :
- others bottleneck ( memory, i/o )
- overhead of using iurt and chroot regeneration
- overhead of uploading to the mirror
- overhead of a non linear repartition ( kde, kernel, openoffice,
sagemath, etc, take more time ).

Michael Scherer

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