Databases Reference
In-Depth Information
Chapter 25
RMAN in Exadata
RMAN is the preferred option to back up a database on Exadata. In this chapter you will learn a few nuances of RMAN
when used in the Exadata environment. When we wrote this topic, Exadata was still on Oracle Database 11g Release 2;
so none of the Oracle Database 12c specific features described elsewhere in this topic applied to Exadata.
The Lay of the Land
Let's start with a general explanation of Exadata. Boiled down to its most rudimentary concepts, Exadata is just a
special-purpose RAC cluster with database servers, storage, and network switches, all within a single enclosure called
a “rack.” An Exadata rack comes in two models, X3-2 and X3-8, and in four sizes: full rack, half rack, quarter rack and
eighth rack. Figure
25-1
shows a schematic representation of the organization of an Exadata X3-2 full rack.
Users
Compute
Node 1
Compute
Node 8
IB
Traffic
Ethernet
Traffic
Ethernet
Switches
Infiniband
Switches
Storage Cell 1
Storage Cell 14
Disk 1
Disk 2
Disk 12
Figure 25-1.
Components of an Exadata full rack
