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You are tasked with checking the status of the Exadata Database Service (ExaDB) components using the dcli utility. You need to gather information about the health and status of the database servers and storage cells across the ExaDB infrastructure. Which dcli command, combined with appropriate commands run across the nodes, will provide the most comprehensive overview?
A . dcli -g cell_group 'list cell attributes name, status' combined with dcli -g dbnodes 'srvctl status database -d dbname'
dcli Utility:
dcli (Distributed Command Line Interface) allows you to run commands on multiple nodes simultaneously.
cell_group: A group configuration file listing all storage cells.
dbnodes: A group configuration file listing all database nodes.
Commands Explanation:
dcli -g cell_group 'list cell attributes name, status':
Retrieves the name and current status of each storage cell.
dcli -g dbnodes 'srvctl status database -d dbname':
Checks the status of the database instances on the compute nodes.
Combining these commands provides a complete picture of both storage and compute components.
Why the other options are incorrect:
B . Including metriccurrent: Produces excessive output, not suitable for a quick health check.
C . Listing dbnodes only: Insufficient as it lacks storage cell status.
D . dcli -g all 'list status': Invalid syntax and lacks specificity.
Oracle Exadata Documentation: Using dcli for Status Checks
When upgrading the Oracle Database software version on a BaseDB VM system, what is the primary responsibility of the database administrator (DBA) regarding the underlying operating system?
Responsibility of DBA:
Before upgrading the Oracle Database software on a BaseDB VM system, the DBA must verify that the underlying operating system version is compatible with the new database software version. This is crucial because Oracle Database upgrades may introduce new requirements or dependencies.
The DBA needs to check the Oracle Database Upgrade Guide and the Oracle Validated Configurations to ensure compatibility. Upgrading without this validation could lead to compatibility issues, failed upgrades, or reduced performance.
Why the other options are incorrect:
A: OCI manages the infrastructure, but the DBA must ensure compatibility.
C: While OCI manages the OS patching, ensuring compatibility is still a DBA responsibility.
D: OS updates should be addressed before the database upgrade, not afterward.
Oracle BaseDB Upgrade Documentation
Which two of the following describe capabilities of the Database Management service in relation to database parameter management?
B . Recommendations for parameter tuning:
Database Management analyzes historical performance data and provides tuning recommendations.
These recommendations align with Oracle best practices to optimize database performance.
C . Comparison of parameter settings:
The service allows users to compare parameter configurations between different databases or across time points for a single database.
This is useful for identifying changes or discrepancies that could impact performance.
Why the other options are incorrect:
A . Automatic correction of parameters: Database Management does not automatically correct parameters; changes require manual intervention.
D . Lack of parameter management: Incorrect statement, as the service does offer parameter management features.
Oracle Database Management Documentation: Parameter Management
Which technology within the Exadata Database Service provides intelligent data offloading and processing capabilities directly within the storage tier?
Exadata Smart Scan:
This technology is a core feature of Exadata storage servers. It allows the storage servers to perform data filtering, projection, and other processing tasks directly within the storage tier before sending the results to the database compute nodes. This significantly reduces the amount of data transferred over the network, leading to improved query performance.
Why the other options are incorrect:
A . Oracle Data Guard: Used for disaster recovery and high availability, not for in-storage processing.
C . Oracle Active Data Guard: Allows read-only access to a standby database, but doesn't provide in-storage processing.
D . Exadata Smart Flash Cache: Used for caching frequently accessed data in flash memory to improve I/O performance. While it enhances performance, it does not provide intelligent data offloading and processing within the storage tier.
Oracle Exadata Database Service Documentation
Which two of the following options are valid statements regarding the management of the operating system on a Base Database Service Virtual Machine DB System?
B . Full root access:
Customers have root-level access to manage the OS, install custom software, and configure settings.
This provides flexibility to meet specific application requirements.
D . Responsibility for OS security:
With root access, customers must manage OS security, including updates and patches.
Oracle provides tools to facilitate patching, but the responsibility lies with the customer.
Why the other options are incorrect:
A . Restricted SSH access: SSH access is allowed for VM DB systems.
C . Oracle-managed OS patching: Oracle does not automatically patch the OS; this is a customer responsibility.
E . Initial OS installation by customers: The OS is pre-installed, but ongoing maintenance is customer-driven.
Oracle BaseDB VM Documentation: VM Management
