[rescue] u2 drive trays
Jonathan C. Patschke
jp at celestrion.net
Tue Aug 19 11:58:28 CDT 2003
On Tue, 19 Aug 2003, Curtis H. Wilbar Jr. wrote:
> OK.... but how is this different from FDDI.... if I have two FDDI
> clients trying to throttle one FDDI server... that is still only
> 100Mbit of bandwidth at the server, and aggregated 200Mbit of clients...
> So how does it differ ?
The clients don't have to fight for fair time at the fabric level. This
is built into the FDDI protocol and is a large portion of why Ethernet
doesn't reach a full 100Mbit in most real-world situations.
To put it another way, FDDI guarantees that each node will have time to
speak. Ethernet makes the switch deal with it.
> Other than MTU, I don't see a big difference between 100baseTX switched
> and FDDI... in the example you cite, how is FDDI going to do any better
> than switched 100baseTX (other than an improved MTU) ?
If you're using NFS, SMB, AFS, AFP, or some other distributed
filesystem, that increased MTU is enough.
As soon as I get the DEFPA drivers working on OpenBSD/sparc64, I'll post
benchmarks for some fairly common scenarios.
Jonathan Patschke ) "We're Texans. We figure out ways to do these
Elgin, TX ( things..." --Bill Bradford
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