🚀 go-pugleaf

Hi


I created an TCP/IP Server that accepts connections from about 300 sockets
and keeps them alive , when one socket sends a request the app understande it
, query a local Infomix server , takes the data and send it over back via the
same socket.


I have used I/O completion ports ( Windows NT ) to implement the I/O requrest
queues .

I developend the app on a IBM Intellistation with 2 Intel Pentium III 500
cpu's and 256MB of RAM , it worked great , the entire process takes about
20-45 ms for each request-query-send cycle!

Now I bought a larger server configuration for my actual platform , it's an
IBM Netfinity 5500 M20 , with 2 Intel Pentium III 500 XEON 512KB cpu's and
same configuration for the other components as the Intellistation.

the only difference is the RAID card that is suppose to be stronger on the
netfinty.


to my horror , I found at first that I got 500ms for the enitre process !! I
reinstaled all the hardware and software and now I get ~90ms.

still , I pointed it out no to be an informix problem ( at least with the
query ) that is the same time.

What I did notice is the recieve cycle ( actuall made out of select , recv )
takes twice the time , and the send cycle take about the same .

I disable the onboard adapter and installed an Intel PRO 100  , the results
are the same.

this is the nefinity configuration :


Netfinity 5500 M20

2 x CPU Pentium III 500 XEON 512K

256MB RAM ECC

OnBoard AMD Fault Tolorent Adapter 10/100
    also tried Intel Pro 100 PCI

2 x 4.5GB HDD , one logical drive ,config as Raid 0

40GB Hdd's , one logical drive , config as Raid 5

Windows NT 4 SP 4 ( 1-4 cpu edition )

Informix 7.30

IE 4

ALL services are idential
all system parameters are identical.




can some one give me a hint of what is going on , why a huge server can't get
the same results as a workstation that costs half as much ?


any help is greatly appreciated !

Moshe






Sent via Deja.com http://www.deja.com/
Share what you know. Learn what you don't.