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GG SCN..........

Annamalai AMar 18 2011 — edited Mar 18 2011

Could you please clarify the following question,

1. Once enabled the supplemental log data in database , whether that supplemental log data consume the more space on disk from actual redolog file size? extract process fetch the changed datas from online redo log file?

3. We have the scn number in database so we can start the extract process based on the SCN(CSN in gg) then why we need RBA? Where actually RBA will be generated and what scenario we can use RBA detail?

3. What is the difference between SCN and RBA?

Please kindly clarify the above queries that would be very much helpful to understand the internal functionality of GG?
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Added on Mar 18 2011