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Oracle Tips by Burleson |
Oracle10g Grid Computing
with RAC
Chapter 5 -
Preparing Shared Storage
LUN stands for Logical Unit Number. It is a
physical disk, as seen by the node or host. They are also called
RAID logical drives. Once they are introduced into a disk group at
the volume manager level, they become the basis for logical volume
creation. Volumes are usable pieces carved out of the storage pool.
When they are used by the database application, they are the raw
partitions. When a file system is created on the volumes, they
become mountable at the operating system level. Figure 5.14 shows
the connection between the storage structures.
Figure 5.14 Storage Volume
Relations
In the case of a Windows platform, the Windows
disk manager provides a facility to create raw partitions. When
using the OCFS (Oracle Cluster File System) module, Veritas CFS or
PolyServe, we can create appropriate cluster file system mount
points.
The above text is
an excerpt from:
Oracle 10g Grid & Real Application
Clusters
Oracle 10g
Grid
Computing with RAC
ISBN 0-9744355-4-6
by Mike Ault, Madhu Tumma
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