You can access the remote database extraction utility in the following ways:
From Sybase Central, for interactive use.
From the system command prompt, using the dbxtract utility. This is useful for incorporating into batch or command files.
By default, the extraction utility runs at isolation level zero. If you are extracting a database from an active server, you should run it at isolation level 3 to ensure that data in the extracted database is consistent with data on the server. Running at isolation level 3 may hamper others' turnaround time on the server because of the large number of locks required. It is recommended that you run the extraction utility when the server is not busy, or run it against a copy of the database
The extraction utility does not unload the objects created for the dbo user ID during database creation. Changes made to these objects, such as redefining a system procedure, are lost when the data is unloaded. Any objects created by the dbo user ID since the initialization of the database are unloaded by the Extraction utility, and so these objects are preserved.
Extracting a remote database in Sybase Central