 |
|
Oracle Tips by Burleson |
Oracle10g Grid Computing
with RAC
Chapter 13 - Oracle RAC Backup and Recovery
RMAN (Recovery Manager)
Oracle RMAN
provides the DBA with a comprehensive backup environment. Using RMAN,
a DBA can perform a multitude of backup types. The abilities of RMAN
depend entirely on whether you are using a backup catalog or not. A
backup catalog is a set of tables stored in an Oracle database that
track backup sets, pieces, and databases. If a catalog is not
available, then RMAN stores the backup data in the control file of the
instance it is performing the backup against.
RMAN also
allows a block-level backup, where only the changed blocks of a
tablespace get backed up. For large databases, the space savings in
using a block-level backup can be enormous.
RMAN is also
critical to ASM, and since ASM is critical to GRID operations, RMAN is
critical for GRID based systems. In ASM, RMAN is responsible for
tracking the ASM filenames and for performing the deletion of obsolete
ASM files. Remember, ASM files cannot be accessed through normal
operating system interfaces, therefore, RMAN is the preferred means of
copying ASM files; however, you can also use FTP through XDB but
generally, RMAN will be less complex. You must learn to use RMAN
because RMAN is the only method for performing backups of a database
containing ASM files.
During
conversion to ASM, RMAN is used for moving databases or files into ASM
storage.
For more information,
see the book
Oracle 11g Grid and Real Application Clusters - 30% off if
you buy it directly from Rampant TechPress .
Written by top
Oracle experts, this RAC book has a complete online code depot with
ready to use RAC scripts.
Customized Oracle Training
Classes
Burleson Consulting offers
on-site
Oracle courses
year-round in a variety of Oracle topics. All on-site Oracle training can be
custom fit to
meet your specific training needs. For
customized
syllabus development or a price quote, please visit
www.fast-track.cc or email
 .
|
