On Tue, 6 Apr 2004 at 3:38pm, Joel Jaeggli <joelja@xxxxxxxxxxxxxxxxxxxx>...: > You can build a pretty wicked disk subsystem these days. single 15k rpm > disk-drives can read a rate of around 86-78MB/s depending on what part of Technology Marches on! My keeping up with it doesn't :) > Do the machines in question have the ethernet in 64 bit pci slots? It's an SBC, and ethernet is on board. The schematic shows an interconnect via 64-bit PCI-X, 133 MHz, via an Intel 82870P2 PCI/PCI-X hub. The eth chip itself is an Intel 82546EB. Dual Gigabit. Soldered in. Copper trace PCI, but no plug-in connectors. > block reads on 4GB files from a netap-940 we were testing were order of > 83MB/s using jumbo 9k ethernet frames... dropping that to 1500mtu made it Off topic (SORRY): Where do I tune these parameters in my NFS setup? I'm actually running RHEL WS3.0 (not Fedora) but should be similar. > desktop which just has 100baset. For small switched environments where > performance is important unmanged gig copper switches now cost order of > $20 a port or less, so if you need the speed it may be cheap. Exactly, our plan is it run multiple SBCs but not have them communicate over a backplane. Instead, using an unmanaged, copper giga switch and Cat5E between them. :) Endpoints will be NFS-mounted RAM disks. You folks are demonstrating to me that it's a pretty efficient pipeline. Neall
