Database Operation
http://master_server is the master service, $db_name is the name of the created database.
List Database
curl -XGET http://master_server/dbs
Create Database
curl -XPOST http://master_server/dbs/$db_name
View Database
curl -XGET http://master_server/dbs/$db_name
Delete Database
curl -XDELETE http://master_server/dbs/$db_name
Cannot delete if there is a table space under the datebase.
View Database Spaces
curl -XGET http://master_server/dbs/$db_name/spaces