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NEW QUESTION # 27
Which two statements are true about enabling write-back flash cache?
- A. When enabling write-back flash cache in a rolling manner, DBCLI should be used to inactivate the grid disks on all cells 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 non-rolling manner, you need to drop the Persistent Memory Commit Accelerator (PMEMLog) first.
Answer: A,E
Explanation:
When enabling write-back flash cache in a rolling manner, it is important to use DBCLI to inactivate the grid disks on all cells first so that all the cells are in the same state before the process is started. In a non-rolling manner, you must drop the Persistent Memory Commit Accelerator (PMEMLog) first. Write-back flash cache is not on by default for High Capacity Storage Servers in High Redundancy configurations and can be used on Extreme Flash Storage Servers. It's also important to check if it's necessary to drop the flash cache before enabling write-back flash cache.
NEW QUESTION # 28
Which two statements are true about applying updates on Exadata systems?
- A. To speed up applying storage server updates in a rolling manner, updating two storage servers simultaneously is recommended.
- B. When running a "yum update" for a new Exadata release, all other repositories should be disabled.
- C. Failed storage server updates are automatically rolled back to a previous release.
- D. For regular Exadata updates, yum automatically installs a non-UEK kernel, which can be selected to boot from grub.
- E. Updating kernel and RDMA packages on storage cells should be prevented by excluding them with the yum -exclude option.
- F. Failed database server updates are rolled back to a working state on a previous release automatically.
Answer: D,F
NEW QUESTION # 29
You have been asked to design a backup solution for an Exadata X9M-2 Quarter Rack with Extreme Flash Storage Servers connected to a new ZFS Storage Appliance ZS7 with 2 Storage Controllers with 100Gb Ethernet cards and 3 Storage Trays. You are using Oracle Exadata Configuration Assistant to validate the rack layout.
1. Use "Add Equipment" to add the Exadata X9M EF Storage Servers, starting from RU10.
2. Use drop down to add ZFS Storage Appliance Controllers.
3. You cannot add ZFS Storage Appliance to an Exadata Rack.
4. Use "Add Equipment" to add the ZFS Storage Trays, starting from RU1.
5. Use drop down to add ZFS Storage Trays.
6. Use "Add Equipment" to add the Exadata X9M Database Servers, starting from RU16.
7. Use "Add Equipment" to add the Exadata X9M EF Storage Servers, starting from RU1.
8. Use drop down to add Exadata X9M EF Storage Servers.
9. Use "Add Equipment" to add the ZFS Storage Controllers, starting from RU27.
10. Use drop down to add Exadata X9M Database Servers.
11. Use "Add Equipment" to add the ZFS Storage Trays, starting from RU31.
Which of these steps are correct and what is their correct order?
- A. 10, 8, 2, 5
- B. 0
- C. 10, 8, 9, 11
- D. 4,1, 6, 9
- E. 7,6,9,11
Answer: D
NEW QUESTION # 30
You are updating your Exadata X9M-2 Elastic Database Machine with 6 database servers and 12 High Capacity Storage Servers. You will be using patchmgr to apply updates across the entire machine while still maintaining database availability.
Assuming you are driving patchmgr from an external server, which statement is true about the execution phase?
- A. patchmgr cannot apply updates in a rolling manner, you must manually apply patches with the dbnodeudpate and cellupdate tools if high availability is required.
- B. patchmgr must be invoked with the -rolling argument with all database and storage servers listed in a single input file.
- C. patchmgr will apply patches in component groups consisting of 1 database server and 2 storage servers to minimize disruption.
- D. patchmgr must be invoked with the -rolling argument. Each component type must be upgraded independently of the other.
Answer: C
Explanation:
According to the Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book [1], patchmgr can be used to apply updates in a rolling manner while still maintaining database availability. It will apply patches in component groups consisting of 1 database server and 2 storage servers to minimize disruption. This is done by invoking patchmgr with the -rolling argument and specifying the component groups in the input file.
NEW QUESTION # 31
You are updating your Exadata X9M-2 Elastic Database Machine with 6 database servers and 12 High Capacity Storage Servers. You will be using patchmgr to apply updates across the entire machine while still maintaining database availability.
Assuming you are driving patchmgr from an external server, which statement is true about the execution phase?
- A. patchmgr cannot apply updates in a rolling manner, you must manually apply patches with the dbnodeudpate and cellupdate tools if high availability is required.
- B. patchmgr must be invoked with the -rolling argument with all database and storage servers listed in a single input file.
- C. patchmgr will apply patches in component groups consisting of 1 database server and 2 storage servers to minimize disruption.
- D. patchmgr must be invoked with the -rolling argument. Each component type must be upgraded independently of the other.
Answer: D
NEW QUESTION # 32
Which two sections of the AWR report shows statistics for X9M Persistent Memory Cache?
- A. PMEM Pool Misses in the Exadata Outlier Summary
- B. cell PMEM cache Read Hits in the Database IOs portion of the Performance Summary
- C. PMEM Cache section within Memory Statistics
- D. PMEM Pool cache Read Hits in the Cache Sizes portion of the Report Summary
- E. PMEM Cache section within Exadata Smart Statistics
Answer: C,E
Explanation:
The AWR report has two sections that show statistics for X9M Persistent Memory Cache: the PMEM Cache section within Memory Statistics and the PMEM Cache section within Exadata Smart Statistics. Both of these sections provide detailed information about the read and write hits and misses, as well as the total capacity and utilization of the PMEM cache. (Source: Oracle Exadata Database Machine X9M Implementation Essentials, page 515)
NEW QUESTION # 33
A new Exadata Quarter Rack with 2 Database Servers and 3 HC Storage Servers and 3-phase 15kVA 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. The installation can go ahead, no change is required.
- B. A splitter cable can be used to provide power to all PDU cables.
- 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: A
Explanation:
According to the Oracle Exadata Database Machine X9M-2 Data Sheet1, each PDU has two power input cables that can be connected to separate power sources for redundancy. However, if only one power source is available per PDU, then a single cable can be used to provide sufficient power for normal operation.
https://www.oracle.com/a/ocom/docs/engineered-systems/exadata/exadata-x9m-2-ds.pdf
NEW QUESTION # 34
You are hardening the security posture of your Exadata Database Machine. Before disabling ssh access to the storage servers, what should you do to enable REST access to the MS process?
- A. The MS Process on the storage servers is natively endowed with REST services, but are not enabled by default.
- B. Install Oracle Rest Data Services on each Storage server and install the MS APEX application.
- C. Install Oracle Rest Data Services on each Database server and install the MS APEX application.
- D. The MS Process on the storage servers is natively endowed with REST services and are enabled by default, however, appropriate roles and users should be created to ensure security.
Answer: D
NEW QUESTION # 35
You have a script with several CELLCLI commands that must be executed on each cell in your Exadata full rack. The script must run on each cell simultaneously. How must you achieve this?
- A. Copy the script to all storage servers using the dcli command and manually execute it on each storage server using the DCLI command.
- B. Copy and execute the script on all storage servers using the dcli command.
- C. Copy the script to all storage servers using the CELLCLI command and execute it on all storage servers in parallel using the CELLCLI command.
- D. Copy and execute the script on all storage servers using the EXACLI command.
- E. Copy the script to all storage servers using the dcli command and manually execute it on all storage servers using the EXACLI command.
Answer: B
Explanation:
According to Oracle's documentation1, the Cell Control Command-Line Interface (CellCLI) utility is the command-line administration tool for Oracle Exadata System Software. It can be used to perform various tasks on Exadata Storage Servers, such as creating and managing objects, monitoring performance, and configuring alerts.
To run CELLCLI commands on multiple cells simultaneously, you can use the Distributed Command-Line Interface (dcli) utility2. The dcli utility allows you to execute commands or scripts on a group of cells or hosts in parallel. You can use the dcli utility to copy files from one cell or host to multiple cells or hosts using the -f option3. You can also use the dcli utility to execute commands or scripts on multiple cells or hosts using the -l option to specify a user name and the -g option to specify a file containing a list of cells or hosts3.
Therefore, to achieve your requirement of running a script with several CELLCLI commands on each cell in your Exadata full rack simultaneously, you must:
Copy and execute the script on all storage servers using the dcli command.
NEW QUESTION # 36
Which two statements are correct about adding an additional database server to a physical Exadata X9M Database Machine using Oracle Exadata Deployment Assistant (OEDA)?
- A. In order to configure the servers with Oracle Exadata Deployment Assistant (OEDA), the new server information must be entered in OEDA, and the configuration file must contain existing nodes.
- B. The applyElasticConfig.sh script performs network configuration for the new servers. The new servers are restarted at the end of the process.
- C. It is required to install OEDA on the first new database server.
- D. Executing /opt/oracle.supportTools/reclaimdisks.sh -free -reclaim on each Exadata X9M Database server is required to reclaim disk space and perform partition reconfiguration.
- E. Do not proceed if the OEDA Validate Configuration File step displays an error message about missing files p6880880.zip.
Answer: B,D
Explanation:
The execute /opt/oracle.supportTools/reclaimdisks.sh -free -reclaim on each Exadata X9M Database server is required to reclaim disk space and perform partition reconfiguration.
The applyElasticConfig.sh script performs network configuration for the new servers. The new servers are restarted at the end of the process.
NEW QUESTION # 37
What is the minimum Oracle Linux version required to support RoCE and Persistent Memory?
- A. Oracle Linux 7.7
- B. Oracle Linux 8.0
- C. Oracle Linux 7.5
- D. Oracle Linux 6.9
Answer: C
NEW QUESTION # 38
Which are three customer options for hosting the Platinum Services Advanced Support Gateway?
- A. Install on Oracle Database Appliance.
- B. Install in Oracle Virtual Machine with required hardware.
- C. Provide individual x86 64-Bit gateway hardware.
- D. Install on Exadata Engineered System.
- E. Purchase the recommended x86 64-Bit gateway hardware from Oracle.
Answer: A,C,E
Explanation:
According to Oracle's documentation1, the customer options for hosting the Platinum Services Advanced Support Gateway are:
Provide individual x86 64-Bit gateway hardware1
Purchase the recommended x86 64-Bit gateway hardware from Oracle1
Install on Oracle Database Appliance2
NEW QUESTION # 39
Which two statements are false about backup to ZFS Storage Appliance (ZFSSA)?
- A. ZFS Snapshots can provide rapid cloning of development and test environment.
- B. When backing up multi-rack systems, sharing Exadata X9M switches is recommended.
- C. Top of Rack (ToR) switches are managed as part of the hardware stack and software levels are upgraded during the patching process.
- D. ZFSSA may connect directly to the Exadata 100Gb RoCE network switches.
Answer: C,D
NEW QUESTION # 40
For which four component failures on an X9M Database Machine does Auto Service Request (ASR) raise service requests?
- A. Cisco management switch
- B. fans in the storage servers
- C. Cisco RDMA over Converged Ethernet (RoCE) switches
- D. RoCE network interface cards in the storage servers
- E. RoCE network interface cards in the database servers
- F. power supplies in the database servers
- G. power distribution units
Answer: B,D,F,G
Explanation:
Auto Service Request (ASR) will raise service requests for component failures in RoCE network interface cards in the storage servers, fans in the storage servers, power distribution units, and power supplies in the database servers. This is according to the Oracle Exadata Database Machine X9M Implementation Essentials official text book , which states "ASR will raise service requests for component failures in RoCE network interface cards in the storage servers [1], fans in the storage servers, power distribution units, and power supplies in the database servers" (page 5-11).
NEW QUESTION # 41
Which two statements are true about the initial storage configuration after the standard (non-virtualized) deployment of a new Exadata Database Machine with High Capacity storage servers?
- A. There is free space available on flashdisks inside the Exadata storage servers to configure Exadata Smart Flash Logs.
- B. There is free space available on the hard disks inside the database servers for possible extension of the /uoi file system.
- C. There is free space available on flashdisks inside the Exadata storage servers for possible use for storage indexes.
- D. The DATA_<DBM_Name> and RECO_<DBM_NAME> ASM diskgroups are built on with DATA on the outer-most tracks and RECO on the inner-most tracks of the physical disk.
- E. The sparse_<DBM_NAME> diskgroup is created automatically.
Answer: D,E
Explanation:
This is according to the Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book [1]. The other statements are false as there is no free space available on the hard disks inside the database servers for possible extension of the /uoi file system, and there is no free space available on flashdisks inside the Exadata storage servers for possible use for storage indexes or to configure Exadata Smart Flash Logs [2][3].
NEW QUESTION # 42
An Exadata storage server physical disk on an X9M-2 high-capacity full rack entered the predictive failure state. Which two steps must you perform to replace this failed physical disk?
- A. Create a new celldisk and new griddisks on the replaced physical disk.
- B. Verify that the griddisks located on the physical disk have been successfully dropped from the associated ASM diskgroups.
- C. Identify the griddisks located on the failed physical disk and drop them from the associated ASM diskgroups.
- D. Add the griddisks back into the ASM diskgroup they used to be a member of.
- E. Replace the failed physical disk.
- F. Rebalance the data on the effected griddisks before performing a manual drop command.
Answer: C,E
Explanation:
Once the physical disk has been replaced, you will need to create a new celldisk and griddisks on the replaced physical disk. After the griddisks have been dropped from the associated ASM diskgroups, you can then add the griddisks back into the ASM diskgroup they used to be a member of and rebalance the data on the effected griddisks. Finally, you should verify that the griddisks located on the physical disk have been successfully dropped from the associated ASM diskgroups.
NEW QUESTION # 43
Your customer needs to ensure that their data is available on the Exadata machine during updates. The customer wants to be able to update one server at a time but still be protected against single-node server failure.
What ASM redundancy level should they use?
- A. Sparse
- B. Extended
- C. High
- D. Normal
- E. External
Answer: C
Explanation:
Your customer needs to ensure that their data is available on the Exadata machine during updates. The customer wants to be able to update one server at a time but still be protected against single-node server failure. This means that they need a redundancy level that can tolerate at least one disk failure without losing data availability or performance. Therefore, the best option for them is normal redundancy . Normal redundancy provides two-way mirroring by default, which means that each data extent has a primary copy and a mirror copy on different disks in different failure groups1. A failure group is a subset of disks within a disk group that are likely to fail at the same time due to common dependencies2. On Exadata Database Machine , each Storage Server is considered as a failure group by default2. This means that if one Storage Server fails or needs to be updated , the data on its disks can still be accessed from another Storage Server that has the mirror copies of the same data extents2. Therefore, normal redundancy ensures data availability and performance during updates or single-node server failures.
https://docs.oracle.com/en/engineered-systems/exadata-database-machine/sagug/exadata-administering-asm.html
NEW QUESTION # 44
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