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In Prism Element, policies such as replication factor and storage efficiency settings are applied to Containers. A container is a logical grouping of one or more storage pools and defines the storage resources available to virtual machines. By applying policies to a container, you can set the replication factor, storage efficiency settings, and other storage-related settings for all of the virtual machines that are associated with that container. This is a fundamental concept in Nutanix Platform.

The minimum cluster size for Redundancy Factor 3 is 6 nodes. Redundancy Factor is a measure of how many copies of the data are stored in the cluster. Redundancy Factor 3 means that there are 3 copies of the data stored in the cluster, which requires at least 6 nodes in the cluster to ensure that all data is stored.

Replication Factor is configured on a Container entity. Containers group together virtual disks and files, and allow administrators to set policies on a group level. This allows for increased flexibility in managing storage resources and allows administrators to easily set policies across multiple virtual disks and files.Replication Factor is configured on Containers. A container is a logical grouping of one or more storage pools and defines the storage resources available to virtual machines. The replication factor is a setting that determines the number of copies of data that are stored across the cluster. By configuring the replication factor on a container, you are setting the number of copies of data that will be stored for all virtual machines that are associated with that container.For example, if you have a container with a replication factor of 3, it means that three copies of data will be stored across the cluster, and two copies are required to reconstruct the data in case of a failure.

In a Nutanix environment, the product or feature most suitable for deploying a Microsoft SQL cluster is Nutanix Objects. Nutanix Objects is a S3-compatible object storage solution that provides a highly scalable and durable storage for unstructured data. It is built on top of the Nutanix Distributed File System (NDFS) and provides a high-performance, scalable, and highly available storage solution.One of the key features of Nutanix Objects is its ability to support Microsoft SQL Server Always On Availability Groups (AAG) on S3 object storage. This allows you to deploy a highly available SQL cluster on Nutanix, with the ability to failover SQL services to a different node in the event of a failure, and provide high availability and disaster recovery for SQL databases.

In Prism Central, Image Placement Policies can be used to map images to target clusters using categories. An Image Placement Policy is a set of rules that determine where an image should be placed on the Nutanix cluster. These rules are based on categories, such as the image's OS type, the target cluster's hardware type, and other factors. By creating image placement policies, you can ensure that images are placed on the appropriate clusters, and that they are compatible with the hardware and software requirements of those clusters.For example, you could create a placement policy that specifies that all Windows images should be placed on a specific cluster, and that all Linux images should be placed on another cluster. You can also set image replication policies on image placement policies, to ensure that images are replicated to multiple clusters for disaster recovery purposes.

An administrator can create an Entity Chart to view the logical usage for multiple storage containers in one chart. This chart can be created from the Prism Element dashboard, and it provides a visual representation of the logical usage of each container, allowing administrators to easily compare the usage of multiple containers at once.

To configure Replication Factor 1 (RF1), the cluster must have at least three nodes. In RF1, data is replicated to two other nodes within the cluster, so having at least three nodes is necessary to ensure that the data is replicated. Moreover, when you configure RF1, the cluster must have a minimum of three nodes to ensure that the data is accessible even if one of the nodes goes down.Reference: https://portal.nutanix.com/page/documents/details?targetId=Prism-Admin-Guidev5_6:pr-data-protection-replication-factor-c.html

An administrator can create VM Protection Policies to enforce VM to host affinity for each VM in the AHV cluster. This will ensure that the VMs are always running on the same host, even if the cluster is resized or the VMs are migrated to other nodes. This is the most efficient way to achieve the desired goal. Reference: https://portal.nutanix.com/page/documents/details?targetId=Prism-Admin-Guidev5_6:pr-vmprofiles-affinity-c.html

The Health dashboard in Prism Element provides an overview of the cluster's health, including alerts and notifications that can help the administrator identify and address any issues. The red heart icon is an indicator that there is an issue with the cluster, and the Health dashboard can be used to investigate the cause of the issue.Reference: https://portal.nutanix.com/page/documents/details?targetId=Prism-Admin-Guidev5_6:pr-dashboard-overview-c.html

This single-block, four-node cluster is configured with Fault Tolerance 1 (FT1) and a Replication Factor of 2 (RF2). This means that the data is replicated across two domains (node, block, or rack). Thus, the cluster can tolerate up to two drive failures on different domains before seeing data unavailability.Reference: https://portal.nutanix.com/page/documents/details?targetId=Prism-Admin-Guidev5_6:pr-data-protection-replication-factor-c.htmlThis single block, four node cluster is configured with Fault Tolerance (FT1) and a Replication Factor(RF2) container holding all user data. FT1 means that there are two copies of data stored across the cluster, and RF2 means that there are two copies of data stored in the container. This configuration can tolerate 2 drive failures on different domains (node, block, or rack) prior to seeing data unavailability.With FT1, if a drive fails, the second copy of the data is still available and can be used to reconstruct the data. With RF2, if a drive fails, the second copy of the data is still available and can be used to reconstruct the data. However, if a drive failure occurs on a different domain (node, block, or rack) from the one containing the other copy of data, the second copy of the data is still available, but the data availability may be affected.It's important to note that this is the maximum drive failures that the configuration can tolerate, and it's recommended to have a disaster recovery plan in place in case of a drive failure, to ensure the data availability and integrity.You can find more information on this topic in the Nutanix Administrator Guide, which is available on the Nutanix support website https://portal.nutanix.com/#/page/docs/details?targetId=Admin- Guide-Prism-v5_24:Admin-Guide-Prism-v5_24