【多选题】
A Archive logs are retained if they are necessary to allow the database to be recovered to a consistent state when an archival backup is restored
B The SPFILE is included in the archival backup.
C The ARCHIVAI attribute for a backup overrides the RMAN retention policy
D They are never considered obsolete by RMAN
E They can optionally be written to a fast recovery area(FRA、.
F All archive logs are retained after an archival backup is taken, until the next archival backup is taken of the same database
G Use of a recovery catalog is always required to support the creation and use of archival backups
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