Refer to this page for background information on Spotlight's connection to Exadata Storage Server (cells).
Note: Spotlight monitoring of Oracle RAC systems requires additional licensing.
How Spotlight connects to Exadata Storage Cells
Spotlight does not directly connect to the Exadata Storage Cells. It uses one of the database nodes as an intermediary to tunnel through to the cell storage nodes to retrieve performance metrics. In a default Oracle Exadata installation, the client will not have direct access to the Storage cells as these are private to the appliance. The database nodes are generally public and can be accessed by the Spotlight client.
Spotlight makes an Oracle connection to the Exadata database nodes.
When this is successful, Spotlight runs a SQL query against an Oracle view - v$active_instances - to obtain the operating system host name. On further processing Spotlight also obtains the domain information. This information is used to establish an operating system connection to one of the database nodes.
Spotlight establishes an operating system connection to one of the Exadata database nodes.
4. Given the information obtained in the preceding steps, Spotlight uses port forwarding to tunnel through to the Exadata Storage Cells via one of the database nodes.
The host names resolve to IP addresses on the management network. You can override this via the Verify Storage Node Connection Details Dialog
It is recommended that the celladmin operating system user account be used for connecting to the Storage Cells.