i am goin to open a website of news,blogs,communities,E-mail,web messenger,matrimonial,online buying and selling,file storing etc. so i need minimum 5gb of webspace and minimum 500 gb of database.

i am expecting around 2,00,000 members will login into my website. i dont know where to take web hosting. and also i want the meaning of what is shared and dedicated hosting. thanks in advance.

I will say dedicated hosting is more suitable for your requirement.

Dedicated server

Performance - You are not sharing the system resources such as processor power, memory and disk space with other sites on the same server.

Greater Reliability - You do not run the risk of the server being slowed down, swamped with traffic, or crashed by another site on a shared server.

Security - As nobody else has access to the server you can be sure of having a much greater degree of security.

Custom Configuration - If you need to install special software or configure the server to your own particular needs then often a dedicated server is the solution.

Custom Firewall - Run your own custom firewall to enforce your own access control policy.

Your own IP address - Most shared hosting sites share a single IP address, with site traffic directed by the server examining `host headers'. In contrast your dedicated server has its own unique IP address.

Upgrade Path - More memory, disk space or extra processors can be added as the need arises.