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NEW QUESTION 47
Which two statements are false about backup to ZFS Storage Appliance (ZFSSA)?

• A. Top of Rack (ToR) switches are managed as part of the hardware stack and software levels are upgraded during the patching process.
• B. When backing up multi-rack systems, sharing Exadata X9M switches is recommended.
• C. ZFSSA may connect directly to the Exadata 100Gb RoCE network switches.
• D. ZFS Snapshots can provide rapid cloning of development and test environment.

Answer: B,C

Explanation:
1. ZFS Storage Appliance (ZFSSA) can't connect directly to the Exadata 100Gb RoCE network switches. ZFSSA uses Fibre Channel protocol to connect to the Exadata storage cells. C. When backing up multi-rack systems, sharing Exadata X9M switches is not recommended. Each rack should have its own switches to minimize the risk of data loss due to switch failure.

NEW QUESTION 48
You have been tasked with replacing a memory module of an Exadata Storage Server and need to power off the affected storage server. Which two commands must you execute to safely power off the storage server in an Exadata X9M Database Machine?

• A. CellCLI LIST GRIDDISK ATTRIBUTES name WHERE asmdeactivationoutcome != 'Yes' on the affected Storage server
• B. CeLLCLI> list GRIDDISK where status != 'inactive' on the affected storage server
• C. CeLLCLI> alter cell shutdown SERVICES all on the affected storage server
• D. shutdown -h now' on the affected storage server
• E. 'crsct1 stop cluster -all' on one of the database servers
• F. CellCLI alter GRIDDISK all inactive on the affected storage server

Answer: D,F

Explanation:
https://docs.oracle.com/en/engineered-systems/exadata-database-machine/dbmmn/maintaining-exadata-storage-servers.html#GUID-AE16A1DA-53C6-4E80-94E5-963AA65373AB The two commands that must be executed to safely power off the storage server in an Exadata X9M Database Machine are E and F.
Command E, CellCLI alter GRIDDISK all inactive, will deactivate all of the GRIDDISKS on the affected storage server. This will ensure that no data is lost during the power-off process.
Command F, shutdown -h now, will shut down the storage server. This will ensure that the storage server is completely powered off and no data is lost.
For more information on how to properly power off an Exadata Storage Server, refer to the Oracle Exadata Database Machine X9M Implementation Essentials official text book and resources [1][2].

NEW QUESTION 49
I/O performance of the prod database on your Exadata Database Machine has degraded slightly over the past month. The database has been allocated to the OLTP I/O Resource Management (IORM) category.
Which two monitoring tools might be useful in examining I/O performance for the prod database?

• A. I/O-specific dynamic performance views such as v$iostat_fiie, v$iostat_function, and v$iostat_consumer_group from the prod
  database instances using SQL *p1us
• B. OS I/O metrics using OS tools such as iostat on the database servers
• C. OS I/O metrics using Enterprise Manager host pages for the storage servers
• D. cellcli (or exacli/exadcli) to examine storage server metrics such as database, category, ceiidisk, and griddisk
• E. OS I/O metrics using OS tools such as iostat on the storage servers

Answer: B,D

NEW QUESTION 50
Which two statements are true for the Oracle Exadata Configuration Assistant (OECA)?

• A. OECA reconfigures the size of disk groups and recreates grid disks.
• B. OECA allows one XT storage server in the configuration.
• C. OECA facilitates PDU power selection initially and after equipment addition.
• D. OECA's "Add Equipment" input option allows allocation of RU slots for customer equipment.
• E. OECA extends the hardware for the elastic configuration only.

Answer: B,D

NEW QUESTION 51
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. 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.
• C. The installation cannot proceed until two power feeds are available per PDU.
• D. A splitter cable can be used to provide power to all PDU cables.

Answer: C

Explanation:
An Exadata Quarter Rack with 2 Database Servers and 3 HC Storage Servers and 3-phase 15kVA PDUs would typically require two power feeds per PDU, one for each of the two power distribution units (PDUs) in the rack. A single power feed per PDU is not sufficient to provide the necessary power to the servers and storage in the rack.
The installation cannot proceed until two power feeds are available per PDU. According to the Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book [1][2], it is recommended that each PDU should have at least two power feeds from different power sources in the data center. This is to ensure redundancy and avoid any power interruption due to power failure on one of the power sources. Splitter cables are not recommended, as they can reduce efficiency and increase the risk of overheating. Rearranging the power cables within the rack is not recommended either, as it does not provide the necessary redundancy for the PDU.

NEW QUESTION 52
......

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