[CentOS] How fast?

Robert Heller heller at deepsoft.com
Mon Oct 5 23:51:37 UTC 2009


At Mon, 5 Oct 2009 15:34:38 -0700 (PDT) CentOS mailing list <centos at centos.org> wrote:

> 
> On Mon, 5 Oct 2009, nate wrote:
> 
> > ML wrote:
> >> HI All,
> >>
> >> How fast does a a small DNS Server need to be? I will have about 10 
> >> servers and a few workstations. I have a few older Compaq PIII 
> >> boxes with 1gb RAM each or I have faster P4 boxes.
> >
> > Your watch is probably sufficient.
> 
> Or your phone...
> 
> It wasn't THAT long ago that "monster" servers ran 85MHz SPARC 4d's. 
> (We had a cool 12-proc unit that auto-failed one cpu so I could say 
> with a straight face that I administered the only 11-processor web 
> server I knew...)
> 
> Seriously, you'd have to look long and hard to find a computer that 
> didn't have the horsepower to host DNS, DHCP, NTP and static HTTP 
> services.
> 
> The bigger issue is ensuring that an older computer has enough disk 
> space to house a modern distro and enough RAM to run modern kernels -- 
> and even then you can tighten things up if you're willing to work with 
> a speciality distro.

Right.  You'll *have* to get at least a socket-7 motherboard with a K6
processor and DIMM RAM sockets and PCI bus, if only because getting
old-school SIMMs is hard these days.  And getting a distro with install
kernels (much less stock kernels) for less than a 586 is getting hard,
unless you opt for something like Slackware or Linux From Scratch.  In
practice any still working minimually i686 system with a reasonable
amount of RAM (for just a DNS server, 256meg RAM and a 20-40 GIG IDE
disk, would probably even be enough to install, say, CentOS).  I
recently installed CentOS 5.2 on a old Dell box (PII or PIII vintage)
with an 18gig disk.  No X11.  Just DNS, DHCPD, PPPD, Samba, CUPS, and
little else.  This little box is just being used as a dialup 'router'. 
It is jacked into a wireless 'router', but the wireless router is just
being used as an accesspoint and Ethernet switch (this is a home setup
-- broadband is not presently available, only dialup internet).

> 

-- 
Robert Heller             -- 978-544-6933
Deepwoods Software        -- Download the Model Railroad System
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