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You plan to monitor the ASM configuration on an X5 Database Machine as part of your role supporting Exadata-based ASM diskgroups.
You want to check for potential space problems that take ASM mirroring requirements into account.
Which two values would you monitor from V$ASM_DISKGROUP or by using the ASMCMD LSDG command?
Determine the Amount of Available Space
To increase the size of the disks in a disk group you must either have unallocated disk space available, or you have to reallocate space currently used by a different disk group.
Example: View the space currently used by the disk groups.
SELECT name, total_mb, free_mb, total_mb - free_mb used_mb, round(100*free_mb/total_mb,2) pct_free
FROM v$asm_diskgroup
ORDER BY 1;
The example above shows that the DATAC1 disk group has only about 15% of free space available while the RECOC1 disk group has about 87% free disk space. The PCT_FREE displayed here is raw free space, not usable free space. Additional space is needed for rebalancing operations.
References:
http://docs.oracle.com/cd/E80920_01/SAGUG/exadata-administering-asm.htm#SAGUG20526
Which three factors should you consider when choosing a method for migrating a database to the X5 Database Machine?
B: Endian format: Non-Exadata format
D: Use Real Production Workload
-- Real Application Testing (RAT)
Which two options should be used to identify a damaged or failing flash card on an X6 Database Machine high-capacity storage server?
The CALIBRATE command runs raw performance tests on cell disks, enabling you to verify the disk performance before the cell is put online. You must be logged on to the cell as the root user to run CALIBRATE.
Oracle ILOM automatically detects system hardware faults and environmental conditions on the server. If a problem occurs on the server, Oracle ILOM will automatically do the following:
Illuminate the Service Required status indicator (LED) on the server front and back panels.
Identify the faulted component in the Open Problems table.
Record system information about the faulted component or condition in the event log.
References:
http://docs.oracle.com/cd/E80920_01/SAGUG/exadata-storage-server-cellcli.htm#SAGUG20617
Which two statements are true about the use of Intelligent Platform Management Interface (IPMI) on an X5 or X6 Database Machine?
A: IPMI -- short for Intelligent Platform Management Interface -- is an interface standard that allows remote management of a server from another using standardized interface. The servers in the Exadata Database Machine follow that. It's not an Exadata command but rather a general Linux one.
To power on a cell or database server, issue this from another server:
# ipmitool -H prolcel01-ilom -U root chassis power on
To stop a server, use the shutdown command. To stop immediately and keep it down, i.e. not reboot, execute:# shutdown -h -y now
C: Like the KCS interface, the SSIF Interface is only specified as a 'Single Threaded Interface' for standard IPMI commands. That is, the BMC implementation is not expected to process more than one IPMI request at a time. While an implementation is allowed to have a degree of 'command queuing', for standard IPMI messages the SSIF lacks a 'Seq' field that software can use to match up particular instances of requests with responses.
References:
Which two are true about Smart Scan?
D: With Exadata storage, database operations are handled much more efficiently. Queries that perform table scans can be processed within Exadata storage with only the required subset of data returned to the database server. Row filtering, column filtering and some join processing (among other functions) are performed within the Exadata storage cells. When this takes place only the relevant and required data is returned to the database server.
E: With Smart Scan processing, row filtering, column filtering, some join processing, and other functions are performed in the Exadata cells.
References:
http://www.centroid.com/blog/exadata-smart-scan-processing
