A "Witness" is a special VM that monitors the Metro Availability configuration health. The Witness resides in a separate failure domain to provide an outside view that can distinguish a site failure from a network interruption between the Metro Availability sites. It can only be configured on AHV and ESXi hypervisors.
The main functions of a Witness include:
· Making a failover decision in the event of a site or inter-site network failure.
· Avoiding a split-brain condition where the same storage container is active on both sites due to (for example) a WAN failure.
· Handling situations where a single storage or network domain fails.
referencs:
https://next.nutanix.com/how-it-works-22/witness-vm-and-why-you-might-need-it-38343#:~:text=A%20%22Witness%22%20is%20a%20special,on%20AHV%20and%20ESXi%20hypervisors.
No comments:
Post a Comment