If you have questions about using mojoPortal, you can post them here.
You may want to first review our site administration documentation to see if your question is answered there.
I want to use mojoportal as city portal.My database is 1 gb and its obviously that 1 day it will be full loaded. What will be then how i can able to extend database?
mojoPortal doesn't implement any database limits. You are limited by your server hardware and any limitations placed on your database by your database software/server.
You should consult the documentation for your database platform for moving databases and setting/unsetting limits.