### Tests of old machine:  2005-11-19
### Tests of new machine:  2005-11-
###
### NFS operation speeds:  a practical comparison.


From old `serv' (500MHz PIII, 128MB RAM) to box (1600MHz 
AthlonXP2000, 512MB RAM), read or write small and large 
files over nfs to test the speed.
The local machine is box, and /dev/shm (tmpfs in RAM) is
being used for storing files at that end.
The server, serv, has 4 disks, all IDE (PATA).
/dev/hda4              26G   16G  9.2G  63% /export/home
/dev/hdb2              89G   84G  1.2G  99% /export/video
/dev/hdd1              38G   28G  8.5G  77% /export/audio
/dev/hdc1              57G   51G  3.5G  94% /export/sfw
The first is mounted on box as /home.
The last three are mounted on box under /home/public.

Note that all tests here resulted only in a low CPU usage
(<50%, often negligible) on the client, box.
e.g.  real:103s, user:0.2s, sys:7.2s


*****************************
READ from /home (small files)

serv$  find Maildir/ -type f | wc -l
	9917

serv$  find Maildir/ -type d | wc -l
	 396

serv$  du -sm /home/nt/Maildir
	 125

box$  time cp -R /home/nt/Maildir /dev/shm/Maildir
real  102.9s

box$  time cp -R /dev/shm/Maildir /home/nt/Maildir_returned
real  102.2s
(nfsd on serv:  2 instances, taking around 10-25% CPU each)

box$  rm -rf /dev/shm/Maildir

box$  time cp -R /home/nt/Maildir_returned /dev/shm/Maildir
real   78.0s
(nfsd on serv:  2 instances taking ~25% CPU each, plus 2 others)

box$ time  rm -rf /home/nt/Maildir_returned
real    8.6s


******************************************************
READ AND WRITE from/to /home

*** read small, write large

box$  time tar -cf Maildir.tar Maildir
real    96.0s

*** read large, write small

box$  mkdir tst ; cd tst
box$  time tar -xf ../Maildir.tar 
real    59.7s

*** delete large and small
box$  cd .. 
box$  time rm -rf Maildir.tar tst/
real    10.3s

*** read small, write large

box$  time tar -cf Maildir.tar Maildir
real    80.9s

*** read large, write small

box$  mkdir tst ; cd tst
box$  time tar -xf ../Maildir.tar
real    55.0s

*** delete large and small
box$  cd ..
box$  time rm -rf Maildir.tar tst/
real    9.5s


***********************************
READ FROM /home, large file

box$  ls -sm /home/nt/Maildir.tar
	114696

box$  time cp /home/nt/Maildir.tar /dev/shm/
real    0.9s
(presumably was cached)

(try to clear cache)
box$ tar -c [^M]* > /dev/null
box$ tar -c /home/public/audio/ > /dev/null  (then interrupt)

box$  time cp /home/nt/Maildir.tar /dev/shm/
real    1.1s
(hmmmm)

(various things:  malloc loads, etc.)
box$  time cp /home/nt/Maildir.tar /dev/shm/
real    7.9s
(ok -- just over 100Mbps if none was cached any more)


**************************************
WRITE TO /home, large file

box$  rm /home/nt/Maildir.tar
box$  time cp /dev/shm/Maildir.tar /home/nt/
real    15.0s

box$  time cp /dev/shm/Maildir.tar /home/nt/Maildir2.tar
real    13.1s


***************************************
WRITE TO /home, small files

box$  mkdir /home/nt/tst ; cd /home/nt/tst
box$  time tar -xf /dev/shm/Maildir.tar
real    55.4s

box$  rm -rf Maildir/
box$  time tar -xf /dev/shm/Maildir.tar
real    55.6s


*****************************************
READ FROM /home/public/sfw:  small files

serv$ cd /home/public/sfw/portage ; du -smc app* | tail -n1 
	   73

serv$ find app-* -type f | wc -l
	14062

box$  time cp -a /home/public/sfw/portage/app* /dev/shm/
real    129.2s

box$  rm -r /dev/shm/app*
box$  time cp -a /home/public/sfw/portage/app* /dev/shm/
real    104.6s


******************************************
READ FROM /home/public/video:  large file

$box ls -sm /home/public/video/tv/Yes_.......avi
	234528
$box time cp /home/public/video/tv/Yes_.......avi /dev/shm/
real    16.6s

$box rm /dev/shm/*
$box time cp /home/public/video/tv/Yes_.......avi /dev/shm/
real    15.8s