Re: Single Core2Duo Quadcore vs. two dualcore Xeon?

On Aug 16, 2007, at 17:20 , Martin Cracauer wrote:

>
>> The Xeon Quad core just got a major price reduction
though, so now
>> I'm looking at a dual quad xeon (with 5320, 1.68Ghz
or 5330 2.0GHz)
>> instead...
>
> You still have to weight whether there is any
application that you
> need that is not multithreaded.

Well the most load (at least from the current situation)
will  
probably be mysql, and apache with mod_php. And that should
be pretty  
multithreaded..

>
>> The "default" mobo at the supplier
(www.mullet.se) uses the X7DVL-i
>> board, which takes 6 FB-DIMMs on two channels (max
out at 16 gig)..
>
> That math doesn't play.

Thats what the specs says.. 6 dimm sockets, altough it
actually  
doesnt say anything about number of channels, that was from
Mullets  
site. mobo spec says 16 gig max.

>
>> But I'm thinking about getting the upgrade mobo
instead, X7BDE, with
>> 8 slots on 4 channels with max 32GB (and also full
KVM features in
>> the IPMI slot..)
>>
>> But I'm curious if this kind of platform will ever
be able to use all
>> this? Disk access, memory bus & cpu etc.. lets
asume I max this
>> system in the future with 32 gigs of mem and 8 2ghz
cores.. Will I
>> ever be able to use that much with a raid5 (or 10,
whats the lists
>> opinion on this? 5 or 10?) config on a PCI-X slot?
>
> Much of ... what?
>
> I can't parse this sentence.

Hehe.. I'll give it another try 

If I push the system to the max cpu/memory wise, will I ever
make any  
use of 8cores each 2Ghz? Memory can always be used I
guess..

>
> For a pure fileserver all this is overkill.

Oh yes, no this is not a fileserver. Mainly web hosting
(combined  
mysql/php)
>
>> But realistically, for a php,mysql,apache,java etc
machine with a
>> number of jails, i wonder if I will ever be able to
use this much
>> power or if I should aim lower and if the box gets
too loaded I'll
>> get another one..
>
> The moment php and Java are involved you are not
strictly disk-bound
> anymore 

Very true.. It would be the mysql processes that would be
limited.


Johan
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On 8/16/07, Johan Ström <johanstromnet.se> wrote:
> Oh yes, no this is not a fileserver. Mainly web hosting
(combined
> mysql/php)

IMO, a weaker diskless C2D server with at least 4 GB RAM for
web hosting
and a C2Q server with at least 4 Gb RAM for CPU intensive
(mysql, php, tomcat)
processing would be a better combination because it's
designed to scale as
your demands increase while at the same time you wouldn't be
keeping all
your eggs in the same basket. When your web server starts
maxing out, you
can just add more RAM until it's time to add another C2D web
server and load
balancing (once you have enough servers you could get an F5
BIG-IP). Your
C2Q is not likely to max out easily, but if/when it does you
won't have to
worry about the cost of adding another one.

As for storage RAID10 in the C2Q server would be OK at
first, but in the long
run I'd get a NAS solution like a NetApp NFS server.

Just my $0.02 worth.

G. Mirov
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