1Z0-027 全真模擬試験 DEMO

問題3: Which two are Oracle recommendations fior media based backups perfiormed fior a database
running on a Database Machine?
A. Allocate equivalent number ofi channels and instances per tape drive.
B. Perfiorm 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. Use InfiniBand network between the media server and the storage servers.
正解: A, C
Explanation:
A: Configure one RMAN channel per tape drive and add tape drives to scale backup rates.
C: Configure the Prefierred Network Interfiace (PNI) to direct the Oracle Secure Backup
traffic over the InfiniBand network interfiace.
Example:
ob> lspni (List Prefierred Network Interfiace)
mediaserver1:
PNI 1:
interfiace: mediaserver1-ib
clients: dbnode1, dbnode2, dbnode3, dbnode4,
dbnode5, dbnode6, dbnode7, dbnode8
PNI 2:
interfiace: mediaserver1
clients: adminserver
dbnode1:
PNI 1:
interfiace: dbnode1-ib
clients: mediaserver1
Note:
* Using the Sun ZFS Backup Appliance as an Oracle RMAN backup target fior an Oracle Exadata
system delivers much
fiaster backup and recovery, enabling organizations to achieve shorter recovery time objectives and
shrink backup
windows. The appliance is designed fior high sustained read and write I/O perfiormance, and it is
connected to the
Oracle Exadata system via a high-throughput InfiniBand network fiabric.
* As the only unified storage vendor to support InfiniBand as a storage network fior backup and
restore operations,
Oracle is leading the way with native high-bandwidth interconnects.
* The InfiniBand network provides 40 Gb ofi 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.