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Identify two valid reasons for executing an X5 Exadata storage server rescue procedure.
The rescue procedure is necessary when system disks fail, the operating system has a corrupt file system, or there was damage to the boot area. If only one system disk fails, then use CellCLI commands to recover. In the rare event that both system disks fail simultaneously, you must use the Exadata Storage Server rescue functionality provided on the Oracle Exadata Storage Server Software CELLBOOT USB flash drive.
You are planning the migration of a large data warehouse to a Little Endian X6 Database Machine using which is running database version 12.2.0.1.
The current database version is Oracle Database 11.2.0.4.0 hosted on a Big Endian platform.
The current database characterset is WE8ISO8859P15.
Which two migration methods are supported?
Identify three valid configuration options that can be implemented during the initial configuration process of a new X5 Database Machine by using the Exadata Deployment Assistant.
Oracle Exadata Deployment Assistant has two main phases
Oracle Exadata Deployment Assistant can configure Oracle Exadata Database Machine, Recovery Appliance, or Oracle SuperCluster.
References:
https://docs.oracle.com/cd/E55822_01/AMOGD/configurator.htm#AMOGD22056
https://www.toadworld.com/platforms/oracle/w/wiki/11469.oracle-exadata-deployment-assistance-oeda
Which three statements are true about Recovery Manager (RMAN) daily differential incremental backup strategies on an X5 Database Machine for a database having 25% or more of its blocks modified each day and which has an 8 k block size?
A: Fast Incremental backups is possible with Block change tracking, which is initially introduced from version 10.2 onwards, by this tool it's very useful to reduce the RMAN incremental backup duration.
If the changes are something around 20% then in this situation BCT helps a lot.
C: Exadata Storage Server offload capability combined with RMAN block change tracking will efficiently perform large I/Os at the storage-tier level, returning only individual changed blocks for incremental backups and increasing the backup performance of the system.
Note: Level 1 backup: A level 1 backup includes only those blocks that have been changed since the 'parent' backup was taken. Remember a parent backup may be either a level 0 or a level 1 backup.
Block change tracking allows indeed the highest benefit for databases where the changes are not so high,
Level 0 backup: A level 0 incremental backup is physically identical to a full backup and it includes every data block in the file except empty blocks. The only difference is that the level 0 backup is recorded as an incremental backup in the RMAN repository, so it can be used as the parent for a level 1 backup.
References:
http://www.dba-oracle.com/t_rman_backup_types.htm
http://www.oracle.com/technetwork/database/availability/maa-tech-wp-sundbm-backup-11202-183503.pdf
https://www.toadworld.com/platforms/oracle/w/wiki/11124.fast-incremental-backups-active-data-guard
An important application has been migrated to a database on an X5 Database Machine.
You are examining high-load SQL statements from this application, in an attempt to determine which ones will benefit from the Exadata Smart Scan capability.
Which three access paths always generate ''cell single block physical read'' or ''cell multiblock physical read'' requests?
