I'll explain my needs, and hopefully someone can tell me what kind of configuration I will need.
I am designing a web page in PHP (LAMP configuration) that will allow 12 separate retailers to store their entire inventories online. Each retailer will use the site to check out customers at each transaction. These are hobby stores, and I estimate that each inventory will have about 300-500 items. In addition, each retailer will do about 10-20 transactions (like checking out a customer) per hour. Sometimes, though, a retailer might want to browse/sort his entire inventory and to do reports on the entire inventory.
One VERY important note: Every single transaction is done over SSL.
I know that this is a difficult question to answer, but could someone give me a vague idea of how much computing power I will need? Right now I do not have a dedicated server. Instead, I am running in a virtual server environment provided by olm.net. Please go to www.olm.net
and look at their lowest-priced VPS plan. That's what I have.
One more question: Now let's change the assumptions and assume that I am going to have 50 retailers instead of 12. Now what kind of configuration will I need?
I know that it's difficult to be specific. Really I'm just looking for general ideas at this point. I'm assigning 500 points to this question because it is quite urgent in timeframe.
Thanks in advance for the advice!