1Z0-536 · Question #33
Why is performing an incremental backup of data from an Exadata Storage Server likely faster than backing up data from normal storage?
The correct answer is D. Offload processing finds only the changed blocks. In incremental backup only the changed blocks are backup up. Exadata Cell has offload capabilities that further speed up incremental backups. Its offload capability combines with RMAN block change tracking to efficiently perform large I/Os at the storage-tier level, returning…
Question
Why is performing an incremental backup of data from an Exadata Storage Server likely faster than backing up data from normal storage?
Options
- AAll data on the Exadata Storage Server is compressed.
- BAll backups from the Exadata Storage Server are compressed.
- CRecovery Manager always uses more threads to perform backups from an Exadata Storage Server.
- DOffload processing finds only the changed blocks.
How the community answered
(64 responses)- A11% (7)
- B6% (4)
- C3% (2)
- D80% (51)
Explanation
In incremental backup only the changed blocks are backup up. Exadata Cell has offload capabilities that further speed up incremental backups. Its offload capability combines with RMAN block change tracking to 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.
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