Measure changes for disaster recovery.

[ohnowhathaveidone]

How do I measure the amount of changes in a database. I'm a unix admin with limited (dangerous) knowledge of Oracle. I want to implement Disaster Recovery by copying changes from a production server to a backup server in another city. I need to know the amount of change on a database, archive logs, redo logs so that I can calculate the size of comms link required between the 2 locations.

 

[dbtoo2001]

Read through

http://www.oracle.com/pls/db92/db92.show_toc?partno=a96653&remark=drilldown&word=dataguard

.
It will explain what is necessary.