Cluster performance with 50 million entries

[Hanny Tidore]

Hi All,

I am thinking of using mysql cluster for about 8 servers (may be HP DL 320 or 360).
The table to be implemented is very simple (id, status1, status2). The operation performed is updating the value of status1 and status 2.
The number of entries for this database is about 60 million.

My questions:
1. How much RAM would I need for each of the server?
2. How fast can an update in one server be propagated to the rest of the server?
3. For performance, do I need more RAM or more CPU (like quad core)?

Thanks.