Databases Reference
In-Depth Information
Chapter 8
Backup and Recovery
As an Exadata Database Machine administrator (DMA), it is important to be able to back up your databases and
software and, ultimately, be able to recover failed components in the event of failure. Since the Exadata Database
Machine consists of multiple servers of different types as well as Oracle databases, a strong, tested, backup strategy is
vital to administering Exadata.
Fortunately for the Exadata DMA, Oracle does a nice job of making your backup and recovery tasks manageable.
Backup, restore, and recovery operations on your compute nodes and Oracle databases will likely be similar to
your processes on non-Exadata Oracle environments. The storage cells are pre-configured with their own backup
and validation framework. Additionally, most of the common backup and recovery tasks are outlined nicely in the
Exadata Owner's Manual
.
In this chapter, we will present assorted Oracle Exadata backup and recovery strategies, techniques, processes,
and supporting information that will enable the DMA to successfully develop a backup strategy and confidently
perform recovery operations.
8-1. Backing Up the Storage Servers
Problem
You wish to back up your Exadata Storage Servers and validate your backups.
Solution
Oracle automatically performs backups of the operating system and cell software on each Exadata Storage Server. The
contents of the system volumes are automatically backed up and require no Oracle DMA intervention or operational
processes.
Oracle assumes responsibility for backing up the critical files of the storage cells to an internal USB drive called
the CELLBOOT USB Flash Drive. You can validate the contents of your
/opt/oracle.cellos/iso
and CELLBOOT
USB Flash Drive as detailed below:
[root@cm01cel01 iso]# ls /opt/oracle.cellos/iso
lboot.cat image.id initrd.img lastGoodConfig trans.tbl
boot.msg imgboot.lst isolinux.bin memtest vmlinuz
cellbits initrd-2.6.18-238.12.2.0.2.el5.img isolinux.cfg splash.lss vmlinuz-2.6.18-
238.12.2.0.2.el5
[root@cm01cel01 iso]#
[root@cm01cel01 iso]# ls /mnt/usb
boot.cat image.id
isolinux.bin lost+found vmlinuz-2.6.18-
194.3.1.0.2.el5
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