Databases Reference
In-Depth Information
Databases in an Exadata Database Machine are typically deployed so that the database files are evenly
distributed across all storage cells in the machine as well as all physical disks in an individual cell. Oracle uses Oracle
Automated Storage Management (ASM) in combination with logical storage entities called
cell disks
and grid disks to
achieve this balance.
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Note
To learn more about cell disks and grid disks, refer to Recipes 3-1 and 3-2.
To summarize, the ExadataStorage Server is quite simply an Oracle Sun Fire X4270 M2 server running Oracle
Linux and Oracle's Exadata Storage Server software. Minus the storage server software component of Exadata (which
is difficult to ignore since it's the primary differentiator with the machine), understanding the configuration and
administration topics of an ExadataStorage Server is similar to any server running Linux. What makes Exadata unique
is truly the storage server software combined with the manner in which Oracle has standardized its configuration
to best utilize its resources and be positively exploited by the cellsrv software. The operating system, image, disk
configuration, and network configuration in an ExadataStorage Server is the trademark of Oracle's entire Engineered
Systems portfolio and as such, once you understand how the pieces fit together on one ExadataStorage Server, you
can be confident that as an administrator you'll be comfortable with any storage cell.
1-3. Displaying Compute Server Architecture Details
Problem
As an Exadata DMA, you wish to better understand the overall hardware configuration, storage configuration, network
configuration, and operating environment of the Exadata X2-2, X2-8, X3-2, or X3-8 Database Machine compute servers.
Solution
The ExadataX2-2 compute servers are Oracle Sun Fire X4170 M2 servers and the Exadata X3-2 compute nodes are
built on Oracle X3-2 servers. Depending on the architecture details you're interested in, various commands are
available to display configuration information. In this recipe, we will show you how to do the following:
•
Validate your Oracle Linux operating system version
•
Query system information using
dmidecode
Display the current server image version and image history
•
•
Check your network configuration
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Note
In this recipe we will be showing command output from an Exadata X2-2 Quarter Rack.
Begin by logging in to an Exadata compute server as root and checking your operating system release:
Macintosh-7:~ jclarke$ ssh root@cm01dbm01
root@cm01dbm01's password:
Last login: Fri Jul 20 16:53:19 2012 from 172.16.150.10
[root@cm01dbm01 ~]# cat /etc./enterprise-release
Enterprise Linux Enterprise Linux Server release 5.5 (Carthage)
[root@cm01dbm01 ~]#
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