Sequence of tasks performed during connection from clients:
-----------------------------------------------------------

1) iRodsServer listen on a well known port 
2) Client connects to the well-known port.
3) Client sends the startup Packet (info on userName, zone, version, 
protocol ...)
4) iRodsServer read the startup Packet
5) iRodsServer forks a child to handling the connection.
6) The child exec iRodsAgent.
7) iRodsAgent calls initAgent to initialize the irods data structures 
including querying the iCat for resource and zone information.
8) iRodsAgent calls sendVersion to send a short massage to the client
including the version of the server to inform the client the connection
has been established.
9) client makes AUTH_REQUEST and AUTH_RESPONSE calls to authenticate,

Timing Results
---------------
All values are given in milliseconds - average(min-max) of 10 timing runs.

Process: iRodsServer

Tasks             IES(one.ucsd.edu)   IES(srbbrick8)        non-IES(srbbrick7)
-----------------------------------------------------------------------------
read StartupPack  0.14(0.13-0.15)     0.41(0.35-0.78) 	    0.39(0.38 - 0.41)
fork agent 	  2.0(1.9-2.2) 	      4.01(0.50-5.60)       2.7(2.6-2.8)


Process: iRodsAgent

Tasks             IES(one.ucsd.edu)   IES(srbbrick8)        non-IES(srbbrick7)
-----------------------------------------------------------------------------
fork (2)         0.05(0.04-0.09)     0.12(0.09-0.29)        0.11(0.10-0.13) 
exec             1.0 (1.0 - 1.0)     12.0 (10.4 - 25.8)     1.97 (1.89 - 2.10)
initAgent        76.7(71.0-98.7)     122.0(118.8-128.0)     33.3(27.8-35.3) 
sendVersion      0.22(0.17-0.38)     0.28( 0.26- 0.40)      0.23(0.22-0.23)
challenge/response 2.5(2.3-4.0)      7.3(6.8-10.4)          4.53(4.46-4.64) 

Notes:

1) one.ucsd.edu is a Intel dual core system. srbbrick8 and srbbrick7 are
relatively old SRB bricks with Intel Celeron processors.
2) For the irodsAgent, the timing for forking represents the time between
the parent (iRodsServer) issues the fork call and the child executes its 
first instruction.

Under heavy load conditions
---------------------
Scripts to run multiple ils concurrently. Can have up to 50 agent processes 
running at a time. All runs for IES(one.ucsd.edu).

Process: iRodsServer

Tasks             Light load          Heavy load
-----------------------------------------------------------------------------
read StartupPack  0.14(0.13-0.15)     0.12 (0.10-0.15)
fork agent        2.0(1.9-2.2)        51.0(43.2-57.6)


Process: iRodsAgent

Tasks             Light load          Heavy load
-----------------------------------------------------------------------------
fork (2)          0.05(0.04-0.09)     3.2(0.4-5.2)
exec              1.0 (1.0 - 1.0)     5.8 (1.2-29.8)
initAgent         76.7(71.0-98.7)     192.0(164.17-202.5)
sendVersion       0.22(0.17-0.38)     14.0(9.1-17.9)
challenge/response 2.5(2.3-4.0)       11.7(9.8-16.7)