According to the web search results, a consistency group is a group of related applications or services that must be recovered together in order to work properly, and this means more than being recovered at the same time67. They also typically need to be recovered to the same point in time6. Therefore, to meet the requirement of protecting all VMs of a multi-tier application at the same time, the administrator must create a consistency group for the application and place all VMs in it8. This way, the administrator can apply data protection policies and schedules to the entire consistency group as a single unit8.

The number of Prism Central instances required to deploy Leap is one per customer environment. Prism Central is a multi-cluster manager that provides a single, centralized management interface for Nutanix environments3. Leap is a native cloud extension that provides disaster recovery as a service (DRaaS) for Nutanix environments4. To use Leap, customers need to have one Prism Central instance deployed in their primary site, and register it with their Xi Cloud Services account5. This Prism Central instance can manage multiple Nutanix clusters across different physical sites or availability zones6.

According to the Nutanix Support & Insights web search result1, erasure coding is a data savings technique that utilizes stripes and parity calculation in a Nutanix cluster. Erasure coding increases the usable capacity on a cluster by reducing the replication factor of data blocks. Instead of replicating data, erasure coding uses parity information to rebuild data in the event of a disk or node failure. Erasure coding can save up to 50% of storage space compared to replication factor 2, and up to 75% compared to replication factor 32.

AOS and M.2 Drives are two updates that can be done while avoiding a host reboot. AOS is the Acropolis Operating System that includes the hypervisor, storage and management components of the Nutanix cluster, and firmware and software updates can also be applied to it without requiring any host reboots