Sync Data

I'm trying to centralize data in a unique db, like it:


---        ---        ---      |DB |           |DB |           |DB |---        ---        ---         \              |
         /           \            |         /      \      -----------    /       |         |/               | "Big" DB
|               |    with    |               | centralized|               | data       |                ------------
 

Information:
1) The "small" DBs sync data with the "big" DB.2) We have 4 linux box above.3) The big DB has a copy of all data. Just
the"small"    DBs inserts data in the "big" one.
 


The question:  Does Postgres do it?

[]'s


Paulo Angelo