Re: P4 Motherboard for File Server

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On Wed, 2004-11-10 at 17:19, Joel Jaeggli wrote:
> On Wed, 10 Nov 2004, Jeff Vian wrote:
> 
> > On Wed, 2004-11-10 at 08:51, Joel Jaeggli wrote:
> >> On Tue, 9 Nov 2004, Nifty Hat Mitch wrote:
> >>>>
> >>>> I don't know why your requirements are so high.. I'm running a P3 300Mhz
> >>>> 512 MB Ram as a file-server.
> >>>>
> >>>> 600GB IDE Storage
> >>>
> >>> I wondered too.
> >>
> >> If you want to get over ~60MB/s agregate via nfs your server is going to
> >> need a faster connection between you disk controllers, processor and your
> >> NIC's than 32bit 33mhz pci.
> >>
> >
> > ~60MB/s sounds like enough to saturate 40 T1 links, and definitely would
> > likely require multiple gigabit LAN as well as massive switches and
> > routers.
> 
> 60MB/s is 480Mb/s and that's nothing for a high-end nfs server.
> 
480/1.54 is still almost 30 T1 volumes.  NFS overhead pushes that a lot
higher.

Are you planning for peak or average?

> > It would seem better to me to use a SAN storage unit with fibre channel
> > rather than a pc file server on a LAN for that massive throughput. NFS
> > will be a major bottleneck here.
> 
> Unless you have some kind of funky namespace mananger, access to san 
> filesystmes is at the block level, access to filesystems via nfs is at the 
> fs level and can thuse be shared. beyond that gigabit ethernet hardware is 
> simply a hell of a lot cheaper than fibre channel.
> 

true

> > In any case, for that throughput it definitely requires a server class
> > system.
> 
> yes
> 
> >> At this point, your IO requirements tend to drive motherboard choice,
> >> which in turn drives processor selection. If you need more than 2 x Gb ethernet
> >> or more than 4 pci-x slots for controllers and additional nics then
> >> obviously your number of choices narrows quite a bit.
> >>
> >>> A file server only needs to have disks that match the
> >>> wire speed.  While he specified multiple network links
> >>> he did not specify the speed of those links.
> >>>
> >>> How many clients, what type of service NFS, samba, ftp, http, squid???
> >>> Lots of things qualify as file serving today.
> >>>
> >>> An rsync host does demand extra CPU if the client load is high.
> >>>
> >>> One comment is that a reliable mother board is likely one that has one
> >>> notch down: CPU, IO and memory installed and two notch up fan/ cooling.
> >>> Keep those disks cool....
> >>>
> >>> Do some measurements... and analysis.
> >>>
> >>>
> >>>
> >>
> >> --
> >> --------------------------------------------------------------------------
> >> Joel Jaeggli  	       Unix Consulting 	       joelja@xxxxxxxxxxxxxxxxxxxx
> >> GPG Key Fingerprint:     5C6E 0104 BAF0 40B0 5BD3 C38B F000 35AB B67F 56B2
> >
> >
> 
> -- 
> -------------------------------------------------------------------------- 
> Joel Jaeggli  	       Unix Consulting 	       joelja@xxxxxxxxxxxxxxxxxxxx 
> GPG Key Fingerprint:     5C6E 0104 BAF0 40B0 5BD3 C38B F000 35AB B67F 56B2


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