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201 · Question #292

You have a pool of servers that need to be tested. All of the servers but one should be tested every 10 seconds, but one is slower and should only be tested every 20 seconds. How do you proceed?

The correct answer is D. It can be done by assigning one monitor to the pool and a different monitor to the slower pool. Different health check frequencies for pool members can be achieved by assigning a default monitor to the pool and overriding its settings with a distinct monitor directly configured on the individual pool member.

Section 2: Configure Load Balancing Features

Question

You have a pool of servers that need to be tested. All of the servers but one should be tested every 10 seconds, but one is slower and should only be tested every 20 seconds. How do you proceed?

Options

  • AIt cannot be done. All monitors test every five seconds.
  • BIt can be done, but will require assigning monitors to each pool member.
  • CIt cannot be done. All of the members of a pool must be tested at the same frequency.
  • DIt can be done by assigning one monitor to the pool and a different monitor to the slower pool

How the community answered

(41 responses)
  • A
    2% (1)
  • B
    5% (2)
  • C
    10% (4)
  • D
    83% (34)

Why each option

Different health check frequencies for pool members can be achieved by assigning a default monitor to the pool and overriding its settings with a distinct monitor directly configured on the individual pool member.

AIt cannot be done. All monitors test every five seconds.

Monitor intervals are fully configurable and are not fixed at five seconds; they can be adjusted to various durations.

BIt can be done, but will require assigning monitors to each pool member.

While technically possible, assigning a unique monitor to every pool member is less efficient than using a pool-level monitor and overriding it for exceptions.

CIt cannot be done. All of the members of a pool must be tested at the same frequency.

It is possible to configure different testing frequencies for individual pool members by applying member-specific monitor settings.

DIt can be done by assigning one monitor to the pool and a different monitor to the slower poolCorrect

You can assign a default monitor to the entire pool and then assign a different, custom monitor directly to the specific slower pool member. This member-specific monitor will override the pool-level monitor for that particular member, allowing for different check frequencies.

Concept tested: Per-pool member monitor configuration and overriding

Source: https://techdocs.f5.com/en-us/big-ip-system-and-module-reference/big-ip-ltm-concepts-and-configuration-manual/health-monitors.html

Topics

#health monitors#pool member specific monitors#monitor interval

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