201 · Question #68
A site has six members in a pool. Three of the servers are new and have more memory and a faster processor than the others. Assuming all other factors are equal and traffic should be sent to all…
The correct answer is A. Ratio C. Observed. When a pool contains members with varying capacities due to hardware differences, Ratio and Observed load balancing methods are most appropriate to distribute traffic effectively across all members.
Question
A site has six members in a pool. Three of the servers are new and have more memory and a faster processor than the others. Assuming all other factors are equal and traffic should be sent to all members, which two loadbalancing methods are most appropriate. (Choose two.)
Options
- ARatio
- BPriority
- CObserved
- DRound Robin
How the community answered
(39 responses)- A85% (33)
- B5% (2)
- D10% (4)
Why each option
When a pool contains members with varying capacities due to hardware differences, Ratio and Observed load balancing methods are most appropriate to distribute traffic effectively across all members.
The Ratio load balancing method allows assigning weighted ratios to pool members, enabling the more powerful new servers to receive a larger proportion of traffic according to their superior memory and processor capabilities.
Priority load balancing is not suitable as it primarily directs all traffic to higher-priority servers until capacity is reached, which does not evenly distribute traffic to all members, especially not based on varying hardware capabilities.
The Observed load balancing method dynamically sends new connections to members based on their real-time performance and current load, which naturally directs more traffic to the faster, more capable new servers as they process connections more quickly.
Round Robin load balancing distributes connections equally to all servers in a sequential manner, without considering the differences in memory or processor capabilities, leading to inefficient utilization of the more powerful servers.
Concept tested: F5 BIG-IP intelligent load balancing for varied capacities
Source: https://techdocs.f5.com/en-us/bigip-15-0-0/big-ip-local-traffic-management-concepts/load-balancing-methods.html#ratio
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