# In order to see if there's a big advantage in using
# the `async' option of NFSv3 (Linux-Linux) the following
# was tried on the link between serv.ntmm.org (in the 
# cupboard) and box.ntmm.org (desktop), copying files
# from and to the /home partition.
# The network is Gbit with one switch between the
# computers; little other activity was going on.
# The disk on the server is a normal boring IDE 40GB
# one:
#=== START OF INFORMATION SECTION ===
#Device Model:     WDC WD400JB-00ENA0
#Serial Number:    WD-WMAD1A534533
#Firmware Version: 05.03E05
#User Capacity:    40,020,664,320 bytes
#Device is:        In smartctl database [for details use: -P show]
#ATA Version is:   5
#ATA Standard is:  Exact ATA specification draft version not indicated

# 292MB in about 7280 files was copied then deleted.  This was done 
# two times with the sync option (write to disk before finishing transaction
# with NFS client) in order to see if any initial caching affected
# results (it didn't).
# Then one more run with the async option on the server.

nt@box ~/ $ time cp -a .??* Maildir/ /home/scratch/nc/
real    8m42.111s
user    0m1.064s
sys     0m17.973s

nt@box ~/ $ time rm -rf  /home/scratch/nc/
real    1m34.603s
user    0m0.068s
sys     0m0.836s

nt@box ~/ $ time cp -a .??* Maildir/ /home/scratch/nc/
time rm -rf  /home/scratch/nc/
real    8m44.402s
user    0m1.128s
sys     0m18.713s

nt@box ~/ $ time rm -rf  /home/scratch/nc/
real    1m36.625s
user    0m0.184s
sys     0m3.184s

## restart service and remount client

nt@box ~/ $ time cp -a .??* Maildir/ /home/scratch/nc/
real    3m12.497s
user    0m0.848s
sys     0m14.333s

nt@box ~/ $ time rm -rf  /home/scratch/nc/
real    0m20.233s
user    0m0.048s
sys     0m1.456s



# Conclusions:  more than doubled copy speed, more than quadrupled
# delete speed.