On Sat, Jan 18, 2003 at 07:04:25PM +0000, [EMAIL PROTECTED] wrote: > Hi, > > > > but i now change some Servers from SuSE to debian > > > and now is the best time to get them a good nic. > > What about a Gigabit NIC ? > > I am setting up a new RAID file server that will see > some traffic. My spec is to us a Gigabit NIC on a > standard (32 bit) PCI card. > I will be talking to 100Mbit clients. > (so will not use special Gbit tricks i.e. jumbo-frame) > > I do think there is no server performance penalty > when using a 1Gig NIC, possibly benefits. > > The server would probably be literally interrupt > driven under heavy load, what with the RAID and > fast the NIC. But that would only apply when > it is going well beond the limitations of a > 100 Mbit card. > > I know it will not deliver 10 times 100Mbits > because of overhead and interrupt load but I > would like to see it max at more than 300Mbit. > > Some CPU offloading to the NIC would be cool. > Who much extra memory would help performance? > > As the price is comming down I hope to move to > installing only 1Gig NICs on all new system. > > Comments, links ??
I am not sure the problem is the cpu processing packets. The 2 mains bottle necks are the bus and the interrupt lacency. the people of the click router project (www.pdos.lcs.mit.edu/click/) made some studdies about those limitation (paper is quite interesting). Their solution is to use DMA based drivers (they coded, tested and modified some of the card drivers, have a look for more details). That's why i dont think that card cpu offloading is not an immediate solution (off course it'll help). > > Re. 100MBit cards. > > Most of my servers are NOT using much transfer bandwith > (behind a 10Mbit connection to the net). > > I use 100Mbit full-duplex on all new systems, > > Most important for me is time to get things working > and stability, I like: > Driver on the Linux install disk > Autoprobe with no parameters to the module > Duplex Auto_Negotiation that works :-) > > (If a card (type that I know) does not work when I > install a new system I throw in the bin (trash)). > > The cards I like and have worked well for me are: > 3C905, sold second hand for almost nothing > Realtek RTL-8139, have had no problems with them > INTEL Ether Pro 100, not many but work ok > > > >normally i use the 8139 becaue the work everywhere. > I am happy to report success when having to clamp > to 10Mbit full-duplex using this card. > (using: options 8139too media=0x0018 ) > > Best > [EMAIL PROTECTED] > > -- > Support freedom, -- give bandwith and diskspace > to Freenet -- http://freenetproject.org > > > -- > To UNSUBSCRIBE, email to [EMAIL PROTECTED] > with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED] -- -> Jean-Francois Dive --> [EMAIL PROTECTED] There is no such thing as randomness. Only order of infinite complexity. - Marquis de LaPlace deterministic Principles - -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]