Should I use olap plus package in my data warehousing project?

I will build a massive data warehousing which size is over 3t.
And I will provide many analytical functions to users.
Oracle 11g is my choice. But OLAP is suitable for me, I don't know?
In my opinion, OLAP is helpful to analysis, but it's hard to refresh data when it's based on a large table.
Who can help me? Thanks.

So as I'm attempting to do the first one of these, I'm feeling like I should have gone with iMovie. Why? Because everything except for the green screen can be done so easily and with profressional looking results in iMovie. But that just doesn't seem right to me.< </div>
It takes thick skin to be in this business so I'll test that ability of yours now: Your statements imply vast gaps in your skills, knowledge and patience. That's not bad, we all got started someplace, but you're in way over your head.
We'll help in any way we can. I'll start by telling you to forget the notion that HD is necessary if your release media are iPods and Flash.
bogiesan

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