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Question ID 3066

You are concerned about how to recover from a failed Exadata Storage Server. What is the best way to recover from a storage cell failure when content in both system disks is lost?
 

Option A

A.    Database Machine Administrators should be prepared by creating a backup using dbserver_backup.sh.
 

Option B

B.    Database Machine Administrators should be prepared by creating a backup to an NFS file location as described in the owners guide.

 

Option C

C.    Any USB can be plugged in to create a backup.
 

Option D

D.    Be sure that you have a backup by running make_cellboot_usb.sh in /opt/oracle.cellos.
 

Option E

E.    Use the Exadata Storage Server rescue functionality that Is provided on the CELLBOOT USB flash drive.
 

Option F

F.    Re-imaging the cell is the only option.
 

Correct Answer E
Explanation


Question ID 3067

You are measuring the I/O savings provided by storage indexes for Table A. One of your scripts displays the I/O savings as a result of the storage indexes. Which two statements are true?
SQL> select count (*) from transmap.mymap_comp 2 where map_id between 400 and 500;
COUNT(*)
103000
Elapsed: 00:00:00.08
SQL> select b.name, a.value/1024/1024 value from vSmystat a, vSstatname b, where b.statistic# = a.statistic#
and b.nafne in (•cell physical IO bytes eligible for predicate offload',
•    cell physical IO interconnect bytes',
•    cell physical IO bytes saved by storage index',
•    cell physical IO interconnect bytes returned by smart scan') order by 1;
Statistic Value (MB)        
        

cell physical IO bytes eligible for predicate offload 2,255 .09 cell physical IO bytes saved by storage index .00 cell physical IO interconnect bytes 1.72
cell physical IO interconnect bytes returned by smart scan 1.68
 

Option A

A.    The storage indexes were disabled using the disable_storage_INDEX Parameter.
 

Option B

B.    Storage Index data is not on the Cell Server's region index memory structures yet because this predicate has not been used.
 

Option C

C.    Since the database was started, no quires were run against this table with the same predicate.
 

Option D

D.    The storage indexes reduced the amount of physical I/O bytes significantly for this query.
 

Correct Answer B,C
Explanation

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