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Which is true about vSAN fault domain?
vSAN requires at least three fault domains to support PFTT=1. Each fault domain consists of one or more hosts. If fault domains are enabled, vSAN applies the active virtual machine storage policy to the fault domains instead of the individual hosts.
What is a fault domain?
A fault domain is a set of hardware components that share a single point of failure. To be fault tolerant to a certain level, you need multiple fault domains at that level. For example, to be rack fault tolerant, your servers and your data must be distributed across multiple racks.
What is a fault domain in Azure?
Fault domains are a logical representation of the physical rack in which a host computer is installed. By default, Azure assigns two fault domains to an availability set.
How do I create a vSAN fault domain?
How to Configure Fault Domain in vSAN Step by Step
- Select your vSAN Cluster. Go to Configure Tab. Expand vSAN Section.
- You will get Fault Domain wizard. Provide Name for your Fault Domain.
- Once you click OK you will see that Fault Domain is created & your host is associated with Fault Domain.
How do I check my vSAN storage policy?
You can review the configuration settings for the default virtual machine storage policy when you navigate to the VM Storage Policies > vSAN Default Storage Policy > Manage > Rule-Set 1: VSAN.
How is vSAN capacity calculated?
Raw Capacity Multiply the total number of disk groups in the cluster by the size of the capacity devices in those disk groups. Subtract the overhead required by the vSAN on-disk format.
What is the difference between fault domain and update domain Azure?
In Fault domain, resources are assigned in physically different servers/racks. Update Domain is used to logically group resources to make sure a group of resources is updated (security patch or other updates) together instead of updating resources randomly.
How do I create a domain fault?
- Create a New Fault Domain in vSAN Cluster.
- Move Host into Selected Fault Domain.
- Move Hosts out of a Fault Domain.
- Rename a Fault Domain.
- Remove Selected Fault Domains.
Why do we need fault domains in VSAN?
The fault domains feature in vSAN is an optional configuration option to improve the resilience of a cluster based on your topology. It ensures that data in the cluster remains available in the event of a single host, or a group of hosts, such as a rack or a data closet are unavailable. Read on to learn more.
How many hosts are in a virtual San fault domain?
If a host is not a member of a fault domain, Virtual SAN interprets it as a stand-alone fault domain. Consider a cluster that contains four server racks, each with two hosts.
How to protect against rack failure in VSAN 6.0?
In order to protect against something like a rack failure, you may have had to use a very high NumberOfFailuresToTolerate value, resulting in multiple copies of the VM data dispersed around the cluster. With VSAN 6.0, this is no longer a concern as hosts participating in the VSAN Cluster can be placed in different failure domains.
What are the new features of VSAN 6.0?
One of the really nice new features of VSAN 6.0 is fault domains. Previously, there was very little control over where VSAN placed virtual machine components.