201 · Question #329
A site has six members in a pool. All of the servers have been designed, built, and configured with the same applications. It is known that each client's interactions vary significantly and can…
The correct answer is C. Observed. To maintain an even load across servers with varying client interactions, a dynamic load balancing method that considers real-time server performance is most effective.
Question
A site has six members in a pool. All of the servers have been designed, built, and configured with the same applications. It is known that each client's interactions vary significantly and can affect the performance of the servers. If traffic should be sent to all members on a regular basis, which loadbalancing mode is most effective if the goal is to maintain a relatively even load across all servers?
Options
- ARatio
- BPriority
- CObserved
- DRound Robin
How the community answered
(38 responses)- A11% (4)
- B3% (1)
- C79% (30)
- D8% (3)
Why each option
To maintain an even load across servers with varying client interactions, a dynamic load balancing method that considers real-time server performance is most effective.
Ratio load balancing assigns a static weight to each pool member, distributing traffic proportionally without dynamically adjusting for real-time server performance variations.
Priority load balancing directs traffic to the highest priority group of servers until capacity is reached, then to lower priority groups, which does not aim for an even distribution across all servers simultaneously.
Observed load balancing modes, such as Least Connections or Fastest Response Time, actively monitor pool member performance metrics and dynamically direct new connections to the server that is currently least utilized or responding quickest, ensuring an even load despite fluctuating client demands.
Round Robin load balancing distributes new connections sequentially to each pool member in turn, irrespective of their current load or performance, making it unsuitable for dynamically varying client interactions.
Concept tested: Dynamic load balancing algorithms for performance
Source: https://techdocs.f5.com/kb/en-us/products/big-ip_ltm/manuals/product/ltm-basics-11-2-0/ltm_basics_load_balancing_methods.html
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