Which statement is true about Enterprise Manager 12c for Exadata?
A.
EM Agents are installed on each database and storage node.
B.
EM Agents should not be installed on Exadata. Remote monitoring is the best practice.
C.
EM Agents can communicate to storage cells via SSH.
D.
The Exadata Plug-In for monitoring switches is installed in each EM Agent.
E.
Storage cells communicate directly to the EM Management Server via SNMP and/or SMTP.
Explanation:
All the code required for monitoring the various Oracle Exadata hardware
components has been bundled into the Oracle Exadata plug-in that is pushed to the agents
running on the Oracle Exadata Compute (or Database) nodes. Once the plug-in is deployed on the
compute nodes, the database machine is ready for discovery with Oracle Enterprise Manager.Incorrect:
Not A: Since agents only run on the compute nodes it is important to assign specific agents to
different Oracle Exadata components. Not B: Oracle Exadata Discovery in Oracle Enterprise
Manager 12c
I think (D) is not correct because it talks about “Exadata Plug-In for monitoring switches” whereas the plugin is required for each and every Exadata component monitoring from EM 12c.
(E) looks more correct to me because this statement is correct “Storage cells communicate directly to the EM Management Server via SNMP” but SMTP is not correct.
C:
EM Agents are installed on each database nodes and they communicate with the storage cells via ssh
It’s C – check the EM Exadata Plug-in installation guide.
Option ‘C’ : Establish SSH connectivity between Oracle Exadata Storage Server and the computer running the EM Agent.
C see: https://docs.oracle.com/cd/E24628_01/doc.121/e27442/ch2_deployment.htm#EMXIG226
Open SSH Ports
The Enterprise Manager Cloud Control 12c Agents require ssh access to the Exadata Database Machine components they monitor. As the Agents will run on the compute nodes the ssh ports, 22, on each of the storage cells, ILOMs, PDUs, KVMs, InfiniBand switches, and Cisco switch will need to be opened for each of the compute nodes.
c