SQL apply and redo

Hello

What is sql apply and eredo? how it is used in the configuration of dg?

Operating system: solaris 10u9
DB: 11R2
ASM: not configured

Kind regards

is related to the data active gurd?

N °

A few days back, someone said that there is no architecture that offers 0% data loss.is it true or not?

SQL apply and redo the two seem to work on or on the logfile.so is the current work until the transaction commited? If I'm wrong correct me please...

Depends on how you define "data loss": If you use the maximum protection mode Data Guard, Oracle says that there is no loss of data.
See Data Guard protection mode http://download.oracle.com/docs/cd/E11882_01/server.112/e17022/protection.htm#CHDDAHJD.

Tags: Database

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