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3 tier combined
  Caravan Business Server (CBS) ASP Java VB
Architecture

 

 

 

 
1 Tier includes - Presentation, Business & Database with browser as front end 3 tier architecture 3 tier architecture 3 tier architecture
Windows Platform. Web based development tool on Win 95, 98, ME, NT, 2000 and XP Web based development tool. Works only on Win NT, 2000 and XP  

Web based development tool. Works on all windows platform and other platforms

Complex to deploy on the web as a web application. Mainly VB applications are client server solutions.
Write once deploy every where including desktop, LAN, intranet, internet and extranet. Works on Win 95, 98 and above Works only on Windows Servers. Cannot deploy solution on Desktops Works on all platforms Works on all Windows platforms, but lot of problems in deployment and complex to deploy on web.
Caravan solutions can be deployed cross platform e.g Windows and IBM OS/2.(Linux solution is to be developed).  Works only on Windows Platform Cross platform solution Works only on Windows platform
Small footprint. The whole CBS is within 1MB. In 10's of MB In 10's of MB In 10's of MB
         
Database

 

 
In built  database with Search Engine. Automatic indexing. Third party databases. The database used are normally RDBMS and does not act as a search engine. Requires Index server The database used are normally RDBMS and does not act as a search engine The database used are normally RDBMS and does not act as a search engine
RDBMS database Yes Yes Yes
Browser front end to access the database No No No
         
Features

 

 

 

 

 

 

 

 

 

 
ftp server. Easy to configure for multiple users. part of IIS Independent ftp Third party
SMTP server part of IIS Independent application  Independent application or third party control.
Excellent web based development tool to develop messaging solution Need third party controls. Serial communication projects may not be possible. Difficult to develop messaging solution Requires many thrid party controls to develop a solution. But it would be client -server application and not web based
Enterprise wide solution with data synchronization, across the web, can easily be developed and deployed across multi location. Centrally located web solutions possible. But distributed enterprise wide solution not possible Centrally located web solutions possible. But distributed enterprise wide solution not possible Only client server applications possible. Works well on LAN. Multilocational enterprise wide solution extremely complex to implement.
In built scheduler. Very useful for messaging applications. No No Yes. Timer control.
In built security to create groups, users and logins. Possible to offer html page wise security No. Have to write lots of program to built this facility into any application No. Have to write lots of program to built this facility into any application No. Have to write lots of program to built this facility into any application
In built communication server for serial and TCP/IP connectivity No. Needs minimum MSMQ for part of a communication solution. Yes Needs third party tools
In built web server Part of IIS Normally needs external web server No
XML support Yes Yes Yes
Event handler No Yes Yes
Learning curve extremely small. Medium Very high High