2V0-21.23 Question 320
Select 3A VMware administrator is managing a cluster of ESXi hosts with multiple datastores. The administrator notices that one of the datastores is experiencing high latency due to contention. To mitigate this issue, the administrator decides to configure Storage I/O Control (SIOC). Which of the following steps are required to successfully enable and configure SIOC for the datastore?
- A
Ensure the datastore is managed by a single ESXi host.
- B
Enable Storage I/O Control on the datastore.
- C
Set the congestion threshold for Storage I/O Control.
- D
Assign shares to the virtual machines accessing the datastore.
- E
Disable SIOC on all other datastores in the environment.
Show answer and explanation
Correct answers: B, C, D
Explanation
Storage I/O Control (SIOC) is a feature that helps manage and prioritize storage traffic during periods of contention. To configure SIOC on a datastore, the administrator must first enable it, set a congestion threshold to determine when SIOC should take action, and assign shares to virtual machines to define their priority for accessing storage resources. These steps help ensure fair allocation of resources and improve performance during contention. SIOC can operate across multiple hosts and datastores, so it is not necessary to disable it elsewhere in the environment.
- A. Incorrect.
Incorrect: SIOC is designed to handle contention across multiple hosts accessing the datastore. It is not limited to a single ESXi host.
- B. Correct.
Correct: Enabling Storage I/O Control is a required step to activate it on the datastore.
- C. Correct.
Correct: The congestion threshold must be configured to determine when SIOC should start throttling I/O requests.
- D. Correct.
Correct: Assigning shares to virtual machines determines their priority for access to storage resources during contention.
- E. Incorrect.
Incorrect: SIOC can be enabled on multiple datastores in the environment, and disabling it on other datastores is not a required step.