Database Reference
In-Depth Information
The ability to back up databases easily through RMAN
Support for OS file system backups, including OCFS file systems (OCFS is deprecated
in Oracle Database 12 c but is still available.)
Support for all major tape drives and SAN tape libraries
Full support for fiber-attached devices as well as Gigabit Ethernet, SCSI, and Infini-
Band environments
Support for all commonly used Internet protocols
The ability to do incremental backups, duplexing of backups, and backups that span
more than one volume
Support for compression and encryption of backups
Reduction in the number of support contacts that are required to deal with backup-
related issues
• As you can see, OSB provides a large number of features that help reduce the demands on
the DBA and provide the best architecture for the enterprise. In this topic, we are mostly con-
cerned with databases and how OSB supports database backups. So, let's discuss that next.
How Does OSB Interface with RMAN?
The nice thing about OSB is that if you are already using a vendor tape API to back up or
restore your databases (called the SBT interface, as we have mentioned in several chapters),
OSB uses the same interface. So, if you are backing up to tape devices, your backup com-
mands will not change. You will still use the SBT library to connect. Thus, a basic BACKUP
command might look like this:
backup database device type SBT;
Notice that the DEVICE TYPE SBT part of the command indicates that you want Oracle
to use the MML interface to connect to some existing tape vendor. So, in changing over to
OSB, your backup scripts need not change at all if you already use the SBT device.
The one exception to this is if you are including specific commands that need to be sent to
the vendor software. In this case, you will probably need to remove those commands from
your backup scripts.
The OSB Architecture
The OSB architecture contains a number of different components. These components are
logically connected together through the OSB domain, and OSB operations are managed
by various OSB daemons. OSB administration is effected through OSB accounts that are
secured through the definition of OSB classes and rights. In the next sections, we will
discuss each of these components in more detail so you will understand the architecture
of OSB.
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