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Oracle Exadata Database Machine X8M Implementation Essentials Sample Questions (Q11-Q16):
NEW QUESTION # 11
What are two recommended configuration best practices for backup and recovery on Exadata?
- A. Even if the backup was limited to writing to four tape drives, eight channels could be specified to expedite the restore process.
- B. When off-site long-term backup retention is needed, use Oracle Database Backup Cloud Service as a low-cost, offsite scalable storage for a disaster recovery solution.
- C. The internal Recovery Appliance backup and restore processing is optimized when the RMAN FILESPERSET parameter is set to 1 for the level 1 incremental backup set.
- D. Placing the backup network on dedicated switches installed in the top of the rack (ToR) has the benefits of isolating the backup network from other workloads and providing a greater level of control.
Answer: A,C
NEW QUESTION # 12
Examine these commands:
1. Execute "crscti stop cluster -all" as the grid user from one database server.
2. Execute "crscti stop cluster -all" as root from one database server.
3. Power off all network switches.
4. Execute "crscti stop cluster" as root from one database server.
5. Execute "crscti stop cluster" as the grid user from one database server.
6. Power off the rack using the power switches on the PDUs.
7. Execute "shutdown -h now" on all database servers.
8. Execute "shutdown -h now" on all Exadata storage servers.
Which is the correct order or the required commands to completely power off an Exadata Database Machine in an orderly fashion?
- A. 4, 7, 8, 3, and 6
- B. 2, 8, 7, 3, and 6
- C. 1, 8, 7, 3 and 6
- D. 5, 8, 7, and 6
- E. 2, 7, 8, and 6
Answer: C
Explanation:
In order to power off an Exadata Database Machine in an orderly fashion, the commands should be executed in the following order: 1) Execute "crscti stop cluster -all" as the grid user from one database server; 2) Execute "shutdown -h now" on all database servers; 3) Power off all network switches; 4) Execute "shutdown -h now" on all Exadata storage servers; and 5) Power off the rack using the power switches on the PDUs. This sequence of commands ensures that all services running on the Exadata Database Machine are in a clean state before powering off the system. (Source: Oracle Exadata Database Machine X9M Implementation Essentials, page 543)
NEW QUESTION # 13
Which three statements are true about the CELLCLI command?
- A. It has command-line history.
- B. It can execute commands on multiple storage servers in parallel.
- C. It can be executed using the DCLI utility.
- D. It can be executed on storage servers.
- E. It requires root privileges to create CELLDISKS and GRIDDISKS.
Answer: A,C,D
Explanation:
The CellCLI utility supports command-line history.
Each Exadata Storage cell can be monitored, configured, and maintained using the cellcli command line interface.
The dcli utility facilitates centralized management across an Oracle Exadata Storage Server Software realm by automating the execution of CellCLI commands on a set of cells and returning the output to the centralized management location where the dcli utility was run.
NEW QUESTION # 14
Which two statements are true about enabling write-back flash cache?
- A. When enabling write-back flash cache in a non-rolling manner, you need to drop the Persistent Memory Commit Accelerator (PMEMLog) first.
- B. Before write-back flash cache is enabled, you need to drop the Flash Cache first.
- C. Write-back flash cache is on by default for High Capacity Storage Servers in High Redundancy configurations.
- D. Write-back Flash Cache cannot be used on Extreme Flash Storage Servers.
- E. When enabling write-back flash cache in a rolling manner, DBCLI should be used to inactivate the grid disks on all cells first.
Answer: B,E
Explanation:
The two statements that are true about enabling write-back flash cache are:
When enabling write-back flash cache in a rolling manner, DBCLI should be used to inactivate the grid disks on all cells first.
Before write-back flash cache is enabled, you need to drop the Flash Cache first.
The Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book states that "when enabling write-back flash cache in a rolling manner [1], grid disks need to be inactivated on all cells before enabling write-back flash cache". It also states that "before write-back flash cache can be enabled, the existing flash cache must be dropped".
NEW QUESTION # 15
An Exadata X9M-2 Elastic Rack with 4 Database Servers and 8 HC Storage Servers and 3-phase 24kVA PDUs is being installed in a Data Center. However, the Data Center is only providing enough power for a single cable from each PDU. Which statement is correct?
- A. A splitter cable can be used to provide power to all PDU cables.
- B. The installation can go ahead, no change is required.
- C. The installation cannot proceed until two power feeds are available per PDU.
- D. The power cables from the servers to the PDUs can be rearranged inside the rack following OECA guidance to utilize a single PDU power cable.
Answer: C
Explanation:
In order for an Exadata X9M-2 Elastic Rack to be installed, two power feeds are required for each of the three-phase 24kVA PDUs. A single cable from each PDU will not be enough to power the rack, and neither a splitter cable nor rearrangement of the power cables from the servers to the PDUs will be able to provide sufficient power for the system. Therefore, the installation cannot proceed until two power feeds are available per PDU.
For more information about power requirements for Exadata X9M-2 Elastic Racks, refer to the Oracle Exadata Database Machine X9M Implementation Essentials official text book and resources.
Search results: [1] Oracle Exadata Database Machine X9M-2 Full Rack Installation - Oracle Docs [2] Exadata Database Machine X8M-2 Mid-Size Rack Installation - Oracle Docs
NEW QUESTION # 16
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