Wed Mar 30 15:25:56 EDT 2011
Copying data from zoo to moms saturates at 12MB/sec, completely
plugging the pipe. No other traffic gets through.
Why does it saturate? And why does it saturate at 12MB/sec (100Mbit?)
for a disk copy with dst and src disks faster than that?
tom@zoo:~$ ssh moms 'cat /dev/zero' | pv >/dev/null
This gives 11-12 MB/sec. These are 100M speeds. Topology is as
zoo -- gig1 -- gig2 -- moms
fast1 fast2 -- internet
Both gigabit ethernet switches have a fast ehternet (100M) switch
attached which connects some slower gear. fast2 is a WRT54G which has
its switch configured to tag the internet port as VLAN1, and bridges
its wifi port to VLAN11 on the shared segment.