Originally posted by: Sunner
Originally posted by: yoda291
Originally posted by: spidey07
Originally posted by: randal
Originally posted by: Sunner
The fastest real world transfer I've seen was between two servers directly connected to each other.
Both are HPaq Proliants with Broadcom bcm5700 NIC's, getting about 40-50 MB/sec, this is sending data from a Win2K box to a Linux box running Samba, no tweaking.
Of course, this measurement is HIGHLY unscientific, seeing as I just looked at the files transferring, somewhat easy though since the files were all 40-50 MB in size and took about 1 sec/file
And yes, PCI is 133 MB/Sec.
PCI-X goes from 66 - 133 MHz, ~ 532 MB/Sec - 1064 MB/Sec.
Then there's PCI-X 2.0, which increases this to a max of 533 MHz, ~4 GB/Sec.
Considering that a standard 1000mbps NIC is PCI@33Mhz/32bits, it becomes nearly impossible for the machine to saturate a gigE network; there simply isn't enough bandwidth on the machine's bus to accomodate moving tons of data from a HD/memory to the NIC and back without everything having to compromise/slow down.
Hence why big iron servers have ridiculous amounts of I/O & bus availability - going so far as to have completely separate busses for different devices.
hence why "real" servers (not the puny wintel crap) have no trouble filling multiple 1000
Base-t ports.
![]()
I fail to see how a server running an intel proc or windows as an operating system affects bus speeds. Last time I checked, most servers sold nowadays use an intel proc.
Well, an IBM pSeries certainly has alot more I/O bandwidth than any Wintel server around.
But again, even lowly 2-way $2K servers use PCI-X buses, oftentime several of them, so they shouldn't have much of a problem, so long as you're not talking loads of GigE ports.
actually a unisys es7000 would be around those IO numbers as well. I'd have to bench them and I don't have several hundred thousand dollars to throw around. Funny sidenote,I conference called a unisys sales rep and an IBM sales rep last year when spec'ing out a database machine (they were all giving me conflicting numbers and facts) -- hilarity ensued, and it eventually degraded into playground name-calling tactics. Fun was had by all.