Re: Performance info for Client/server

-- 
Francisco C Piragibe de Almeida
Distributed Databases Consultant
Phone#: 55-21-2332691
Fax#: 55-21-2537390
e-mail: piragibe_at_esquadro.com.br



> Tony Brown <tb_at_arete.demon.co.uk> wrote in article


 <805843895wnr_at_arete.demon.co.uk>...


> We have an existing Database written for Oracle 7 and


 Forms 3 which we 


> run on a UNIX machine with access via VT220 emulators.


 We are in the 


> process of converting to Developer 2000 and using it in


 client/server 


> mode. I have a number of queries about the possible


 pereformance issues 


> and wondered if anyone had had experience of doing this.

> 

> 1. How much of a PC do I need for 4.5 to run OK 


It should be, at least, a 486 DX4-100 with 16MB memory and
a 500 MB hard disk, video and disk connected through VESA
or PCI adapters. I'd recommend you  PENTIUM 100 Mhz class
machines and 32 MB of memory.


> 

> 2. What is the difference in performance between direct


 connect (VT220) 


> and client server. Should we expect it to be better or


worse.
As the protocols are very "machine expensive", and
Windows-3.1 is not a 32 bits operating system, performance
suffers a lot. You should expect worse performance as a
rule (that's the reason for the suggested PENTIUM's)


> 

> 3. Is there any FAQ or similar relating to


 performance/sizing 


> algorithms for estimating which target machines (s) will


 provide a 


> comfortable performance.


As far as I know, no. The only one that showed to be
trustworthy is "never go for mininum configuration client
machines"


> 4. Any one had adverse experience in doing this sort of


thing
Despite of the machine requirements, conversion is a
fairly straightforward process. The vast majority of
problems are related to Windows 3.1 poor memory
management, not to Developer/2000 itself. You will
experience quite a few GPF's at the beginning, but things
usually get better in a few weeks and stay this way.


> Thanks in Advance.


It's allright!