Which two are Oracle recommendations for media based backups performed for a database running on a Database Ma

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Which two are Oracle recommendations for media based backups performed for a database
running on a Database Machine?

A.
Allocate equivalent number of channels and instances per tape drive.

B.
Perform periodic level 0 backups and daily cumulative level-1 backups.

C.
Use the InfiniBand network between the database server and media server.

D.
Configure Recovery Manager (RMAN) channels to connect to the least loaded instances.

E.
UseInfiniBand network between the media server and the storage servers.

Explanation:
A:Configure one RMAN channel per tape drive and add tape drives to scale backup rates.
C:Configure the Preferred Network Interface (PNI) to direct the Oracle Secure Backup
traffic over the InfiniBand network interface.
Example:
ob> lspni (List Preferred Network Interface)
mediaserver1:
PNI 1:
interface: mediaserver1-ib
clients: dbnode1, dbnode2, dbnode3, dbnode4,
dbnode5, dbnode6, dbnode7, dbnode8
PNI 2:
interface: mediaserver1
clients: adminserver
dbnode1:
PNI 1:
interface: dbnode1-ib
clients: mediaserver1
Note:
*Using the Sun ZFS Backup Appliance as an Oracle RMAN backup target for an Oracle Exadata
system delivers much faster backup and recovery, enabling organizations to achieveshorter
recovery time objectives and shrink backup windows. The appliance is designed for high sustained
read and write I/O performance, and it is connected to the Oracle Exadata system via a highthroughput InfiniBand network fabric.
*As the only unified storage vendor to support InfiniBand as a storage network for backup and
restore operations, Oracle is leading the way with nativehigh-bandwidth interconnects.

*The InfiniBand network provides 40 Gb of bandwidth per port between the database servers,
storage cells, and the Sun ZFS Backup Appliance. Backup and restore operations can be
automatically parallelized across all database nodes, Oracle Exadata storage cells, Sun ZFS
Backup Appliance channels, and controllers.

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