Hi Before replying please read this carefully.. How to create a website where I could store online data of around 20,000 users. How much domain space I would require and wats the procedure? Now some basic question... How to build a site like facebook?
There are plenty or turnkey facebook clone scripts out the so you could start with one of them as a base for your site, i have a site with around 15k users and each user has about 4 pages of information and the db is about 300meg+ but if you let user have blogs, upload pics, videos etc the space is going to go up rapidly also if you are planning on 20k users you are going to need a good VPS or even a dedibox with a decent amount of monthly bandwidth
Well mysql data wont take much space maybe 500 mb for that many members with post data and stuff the issue will be the images and otehr data a user uploads. Try social engine
First you use open source script Get unlimited Webhosting and Mysql Check our Social network in my signature we using opensource script
Unlimited webhosting is NOT actually unlimited.... It's better to buy a server to spec, not just "UNLIMITED / UNLIMITED / UNLIMITED" crap.