Backup Omeka to new server

Hi, could anyone teach me how to backup entire omeka to go new server/hosting? I'm sorry because is noob question ...

Luckily, we have instructions in our Documentation section to help you do just that:
http://omeka.org/codex/Moving_to_Another_Server

oh thank yu so much,
it's very useful ....

Hi again...
I hv something problem when I wanna import my omeka database with extension .sql to new phpmyadmin. because it's to large to import.

Does omeka have other way to import that database to new server, or other way to reduce the size of database but when import that, there is no missing data?

The easiest thing to do is to export the database in pieces, maybe just 10 tables at a time and try uploading each piece separately.