1z0-902 Oracle Exadata Database Machine X9M Implementation Essentials Questions and Answers

According to Oracle’s documentation12, ASM failure groups provide redundancy by storing mirror copies of data on different disks or storage servers. When ASM allocates an extent for a normal redundancy file, ASM allocates a primary copy and a secondary copy. ASM chooses the disk on which to store the secondary copy so that it is in a different failure group than the primary copy1. This way, if one disk or storage server fails, ASM can still access the data from another failure group2.

Therefore, the statement that is true about how ASM failure groups provide redundancy is:

• Failure groups contain all ASM disks in a single storage server preventing mirror copies being written to the same storage server.

• Option C shows the number of read hits from PMEM cache on storage servers which indicates how much data was served from PMEM instead of flash or disk1.
• Option E shows detailed information about PMEM cache such as size, utilization, hit ratio, read latency and write latency2.

The correct sequence is:

• uk.co.certification.simulator.questionpool.PList@ddad710

• uk.co.certification.simulator.questionpool.PList@ddad780

• uk.co.certification.simulator.questionpool.PList@ddad880

• uk.co.certification.simulator.questionpool.PList@ddad910

• uk.co.certification.simulator.questionpool.PList@ddad980

According to Oracle documentation12, patchmgr is the utility used to update software for Exadata infrastructure components. It can apply patches in a rolling or non-rolling manner depending on the argument and input file provided.

Oracle Linux 7.9 is the minimum version required to support RoCE and Persistent Memory. This is because Oracle Linux 7.9 includes kernel enhancements that enable RDMA over Converged Ethernet (RoCE) networking and Intel Optane DC Persistent Memory Modules (DCPMM) for Exadata X8M systems3. These features allow faster access latency and higher throughput for database workloads2.

B and E are true statements for the Oracle Exadata Configuration Assistant (OECA). OECA facilitates PDU power selection initially and after equipment addition, and it allows for the elastic configuration of the hardware. It does not reconfigure the size of disk groups or recreate grid disks, nor does it allow for a single XT storage server in the configuration. The "Add Equipment" input option does allow for the allocation of RU slots for customer equipment.

References for this information can be found in the Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book and Resources.

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