CLOUD COMPUTING

CLOUD COMPUTING

DISASTER RECOVERY

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

One of your database servers is mission-critical. What is the best item to implement to ensure minimal downtime of the server and ensure faulty tolerance of the data stored on the database server?

A	UPS
B	Spare parts
C	RAID
D	Redundant server

Explanation:

Detailed explanation-1: -By keeping two copies of data on separate disks, data is protected against a disk failure. If, at any time, a disk in the RAID 1 array fails, the remaining good disk (copy) can provide all of the data needed, thus preventing downtime.

Detailed explanation-2: -RAID 1 is one of the best levels for fault tolerance. Instead of stripping data and writing it across multiple disks, RAID 1 copies all of the data from one disk and puts it on another disk. It creates a replica of the data that gets stored onto a disk.

Detailed explanation-3: -Create a RAID 5 array to provide both fault tolerance and increased performance. A RAID 0 array increases performance only, while a RAID 1 array provides only fault tolerance. Install three disks to create RAID 5 array. A RAID 5 array requires a minimum of three disks.

Detailed explanation-4: -Parity – provides basic error checking and fault tolerance by storing checksums separately from data and enables the reconstruction of lost data without sacrificing speed and capacity.

There is 1 question to complete.