[ale] Fast NFS

[Christopher Fowler]

I think it may be related to the ARM board.  It has only 32mb of mem and
that is not much when compiling glibc.

Here is kernel log:

__alloc_pages: 0-order allocation failed (gfp=0x92/0)
__alloc_pages: 0-order allocation failed (gfp=0x92/0)
__alloc_pages: 0-order allocation failed (gfp=0x92/0)
__alloc_pages: 0-order allocation failed (gfp=0x92/0)
__alloc_pages: 0-order allocation failed (gfp=0x92/0)

Which tells me we are running out of memeory.

On Sat, 2004-09-11 at 23:54, Stephan Uphoff wrote:
> On Sat, 2004-09-11 at 23:12, Christopher Fowler wrote:
> > Funmy.
> > 
> > I can't imagine a busty load.  I'm on a 100mbs switch and all I'm doing
> > on the ARM is compiling GCC.  What else could be going on that the NFS
> > server does not respond?  It is only serving up one share to one
> > machine.  It is doing nothing else.
> 
> Are you using NFS2 or NFS3 ?
> 
> Have you tried to reduce the write/read size all the way down to 1024 ?
> 
> Some network cards are just overwhelmed when a packet train for
> a big NFS request/reply is coming in.
> 
> What NIC are you using on the server?
> 
> How big is the receive queue on your arm board? 
> Can the board get enough memory to replace the buffers used
> by the received frames?
> 
> As always a network sniffer is your best friend.
> 
> 
> 	Stephan
> 
> 
> > 
> > 
> > On Sat, 2004-09-11 at 21:29, Pete Hardie wrote:
> > > On Sat, 11 Sep 2004 17:32:58 -0400, Stephan Uphoff <ups at tree.com> wrote:
> > > > My guess is that IP fragmentation issues (packet loss under load, busty
> > > > load .. ) are killing you. (You are using UDP right ?)
> > >
> > > "Busty load"???  When did they extend NFS to recognize porn? :->
> 
> NFS 6 ?
> 
> Not that I know of - but NFS 4 gained non persistent file handles for
> the MS crowd :-( .... so they are definitely trying for mass appeal :-)
> 
> 
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