On 7/20/05, Erik Mouw <[EMAIL PROTECTED]> wrote: > On Wed, Jul 20, 2005 at 02:16:36PM +0200, Bastiaan Naber wrote: > > I have a 15 GB file which I want to place in memory via tmpfs. I want to do > > this because I need to have this data accessible with a very low seek time. > > That should be no problem on a 64 bit architecture. > > > I want to know if this is possible before spending 10,000 euros on a machine > > that has 16 GB of memory. > > If you want to spend that amount of money on memory anyway, the extra > cost for an AMD64 machine isn't that large. > > > The machine we plan to buy is a HP Proliant Xeon machine and I want to run a > > 32 bit linux kernel on it (the xeon we want doesn't have the 64-bit stuff > > yet) > > AFAIK you can't use a 15 GB tmpfs on i386 because large memory support > is basically a hack to support multiple 4GB memory spaces (some VM guru > correct me if I'm wrong). Just get an Athlon64 machine and run a 64 bit > kernel on it. If compatibility is a problem, you can still run a 32 bit > i386 userland on an x86_64 kernel. > > > Erik > > -- > +-- Erik Mouw -- www.harddisk-recovery.com -- +31 70 370 12 90 -- > | Lab address: Delftechpark 26, 2628 XH, Delft, The Netherlands > -
Bastian, Erik is dead-on on that one: go 64bit and forget all worries about your 15GB filesize. Just don't forget to look not only x86-64 (intel or amd) but also itanium, ppc64 and s390 machines, you never know about surprises! -- Greetz, Antonio Vargas aka winden of network http://wind.codepixel.com/ Las cosas no son lo que parecen, excepto cuando parecen lo que si son. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/