High Availability Solution for Mission-Critical Applications
Question
Server A hosts a mission-critical business application.
The server has one disk and one NIC.
The administrator has been asked to implement a solution to meet the business requirement that the application must maintain high availability, even in case of a hardware failure.
Which of the following BEST meets this requirement?
Answers
Explanations
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A. B. C. D.A.
The best solution to meet the business requirement of maintaining high availability, even in case of a hardware failure, is to implement a failover clustering solution using Server A and a new server.
A failover cluster is a group of servers that work together to provide high availability and load balancing for critical applications. In a failover cluster, one server serves as the primary server, while the other server(s) serve as standby servers. If the primary server fails, one of the standby servers automatically takes over its workload without any downtime or interruption to the application.
Option B, adding multiple disks on the server and configuring RAID 5, is a good solution for data protection and improved disk performance, but it does not provide high availability in case of a hardware failure. RAID 5 only protects against a single disk failure and does not provide automatic failover to a standby server.
Option C, adding an additional NIC and configuring it as standby, may provide some level of redundancy but it does not provide a failover mechanism. Additionally, it assumes that the hardware failure will be related to the NIC, which may not be the case.
Option D, moving the application to another server that has more resources, may not be a viable option if the application is mission-critical and cannot afford any downtime during the migration process. Additionally, it does not address the issue of hardware failure and the need for high availability.
Therefore, the best solution for meeting the business requirement of maintaining high availability, even in case of a hardware failure, is to configure failover clustering using Server A and a new server.
