CS409 Quiz 2 Solution and Discussion

[zareen]

Availability comprises __________distinct components.

[zareen]

Database backup policy should consider following factor(s) before backup.

[zareen]

Media recovery deals with ____________.

[zareen]

Data is not altered in _____________.

[zareen]

______________ is an exact copy of a single data file, archived redo log file, or control file.

[zareen]

Rollback of transactions is normally used to :

[zareen]

__________________ is typically fast compared to other migration technology.

[zaasmi]

@zareen said in CS409 Quiz 2 Solution and Discussion:

__________________ is typically fast compared to other migration technology.

Array-based Migration

(Specifically, the third option: Array-based Migration.)

Why it is the fastest:

Array-based Migration occurs at the storage hardware level. It uses specialized controllers and high-speed links to move data directly from one storage array to another without involving the host servers (the computers using the data).

• Speed: It offloads the work from the servers and the local area network (LAN), using dedicated storage area network (SAN) bandwidth.
• Efficiency: It handles massive volumes of data at the block level, making it significantly faster than host-based methods that have to process files through the operating system.

---

[zaasmi]

Actually, there might be a bit of confusion in that interpretation. In the context of computer science and storage management exams (specifically regarding Data Center Management or Storage Area Networks), the question is usually asking which technology provides the highest performance and speed.

The correct answer remains Array-based Migration.

Why “None of the above” is incorrect in this context:

While you are right that a prompt needs a clear question, in standardized testing for IT certifications (like EMC, NetApp, or VMware), this specific sentence structure is used to test your knowledge of migration overhead.

Here is the technical comparison of why Array-based is the fastest:

• Host-based: Slowest because it consumes the host’s CPU/memory and moves data across the standard network.
• Appliance/Fabric-based: Fast, but requires an extra layer of hardware in the middle which can create a bottleneck.
• Array-based: Fastest because it moves data directly from one storage controller to another at the block level, usually over high-speed Fibre Channel links, with zero impact on the host or the application.

If you are filling this out for a quiz, the system expects you to identify the most efficient technology from the list provided.