Software Suite for Oracle Instruction Manual

2.2
Virtual Copies
Recovery Manager for Oracle User’s Guide
2.7 The Virtual Copy Repository 2.14
2.7.1 The Virtual Copy Repository Removal Utility 2.14
2.8 Virtual Copy Policy 2.15
2.9 Database Rollback from a Virtual Copy 2.15
2.10 Recovery Manager and Third-Party Backup Tools 2.16
2.10.1 The Database Backup Utility 2.16
2.10.2 The Database Restoration Utility 2.20
2.11 Recovery Manager with Remote Copy 2.21
This chapter introduces virtual copy technology and provides instructions for using 3PAR
Recovery Manager to back up and restore Oracle databases.
In this document, the following terminology is used:
■ primary host - A host machine where the Oracle database installation occurs.
■ backup host - A host machine where Recovery Manager for Oracle operations and backup
media installation take place.
2.1 Virtual Copies
A virtual copy is a point-in-time image of a virtual volume created using the copy-on-write
technique. It is composed of a pointer to the parent virtual volume and a record of all the
changes made to the parent since the virtual copy was created. These changes can be rolled
back to reproduce the parent’s earlier state.
A virtual copy can be exported to or mounted on a server to allow regular operations such as
backup or off-host processing.
Within 3PAR Recovery Manager, a virtual copy of a database is a point-in-time image of the
database. It consists of virtual copies of the virtual volumes where the data files and/or archive
logs reside. Recovery Manager can be used to create an online, offline, datafile, or archive log
virtual copy of an Oracle database. An online or offline virtual copy is a point-in-time image of
a database, which is taken while the database is OPEN (online) or CLOSED (offline),
respectively. A datafile virtual copy is a point-in-time image of all database's datafiles, which is
taken while the database is OPEN (online). An archive log virtual copy is a point-in-time image
of database's archive log destination, which is taken while the database is online (OPEN).