C. Based on SLB's working mechanism, approximately 20% of loads will be assigned to ecs_inst1. The weight settings determine the distribution of traffic to backend ECS instances. In this case, you've set the weight of ecs_inst1 to 100, which means it will receive a higher proportion of the traffic compared to the other instances. However, it doesn't mean all traffic will go to ecs_inst1. SLB distributes traffic based on the weight and also takes into account the actual server conditions, such as the health status of the instances. Since you mentioned that all 5 ECS instances are healthy, and assuming no other weights have been explicitly set for the remaining 4 instances, the SLB will distribute approximately 20% of the traffic to ecs_inst1 and distribute the rest evenly among the other instances. This is how SLB's load balancing mechanism typically works with weight settings.

C. Based on SLB's working mechanism, approximately 20% of loads will be assigned to ecs_inst1. The weight settings determine the distribution of traffic to backend ECS instances. In this case, you've set the weight of ecs_inst1 to 100, which means it will receive a higher proportion of the traffic compared to the other instances. However, it doesn't mean all traffic will go to ecs_inst1. SLB distributes traffic based on the weight and also takes into account the actual server conditions, such as the health status of the instances. Since you mentioned that all 5 ECS instances are healthy, and assuming no other weights have been explicitly set for the remaining 4 instances, the SLB will distribute approximately 20% of the traffic to ecs_inst1 and distribute the rest evenly among the other instances. This is how SLB's load balancing mechanism typically works with weight settings.