What is asymmetric clustering characterized by?

• A. One machine in hot-standby mode
• B. All machines active
• C. Equal load distribution
• D. No standby machines

Answer: (A)

Asymmetric clustering is characterized by having one machine in a hot-standby mode. In this configuration, one server actively handles all the processing and workload, while the other server or servers stand by and do not share the load. The standby machine becomes active only in the event of a failure of the primary server, which ensures reliability and fault tolerance. This approach allows for resource optimization, as the standby server is not involved in everyday operations, thereby preserving its resources for failover situations.

In contrast, other configurations like symmetric clustering involve all machines being active and sharing the load (not applicable here), while some approaches may involve a balance without dedicated standby roles (also not true for asymmetric clustering). Thus, the unique attribute of having one machine in hot standby sets asymmetric clustering apart from other clustering strategies.