Data Protection Strategy The below image is a representation of the capabilities that the Nutanix solution offers across the entire data protection spectrum. Nutanix offers a natively integrated solution for data protection and continuous availability at VM granularity. It gives administrators an affordable range of options to meet the recovery point objectives (RPO) and recovery…
Synchronous Replication is a feature where data is synchronously replicated between two sites in metro availability configuration. In an event of a disaster on any one site, real-time data is available on the other site. The protection domain can be configured for metro availability or for synchronous replication depending on the following: Metro availability: The…
NearSync Building upon the traditional asynchronous (async) replication capabilities mentioned previously; Nutanix has introduced support for near synchronous replication (NearSync). NearSync provides the best of both worlds: zero impact to primary I/O latency (like async replication) in addition to a very low RPO (like sync replication (metro)). This allows users have a very low RPO…
Data Resiliency Levels The following table shows the level of data resiliency (simultaneous failure) provided for the following combinations of replication factor, minimum number of nodes, and minimum number of blocks. Replication Factor Minimum Number of Nodes Minimum Number of Blocks Data Resiliency 2 3 1 1 node or 1 disk failure 2 3 3…
What is the different between Redundancy Factor and Replication Factor? Redundancy Factor (aka FT – Fault Tolerance) in the simplest terms, is the number of components that a Nutanix cluster can withstand at any time +1. These components include disks, NIC’s, and nodes. For example, in a two block environment and the default Redundancy Factor…
Acropolis Block Services (ABS) Exposes backend DSF to external consumers via iSCSI Use Cases: Oracle RAC MSCS Containers Bare-metal Exchange on vSphere Constructs: Data Services IP: Cluster Wide VIP for iSCSI logins Volume Group: iSCSI target/group of disk devices Disks: Devices in Volume Group Attachment: Permissions for IQN access Backend = VG’s disk is just…
The Nutanix cluster automatically selects the optimal path between a hypervisor host and its guest VM data. The Controller VM has multiple redundant paths available, which makes the cluster more resilient to failures. When available, the optimal path is through the local Controller VM to local storage devices. In some situations, the data is not…
VM High Availability Modes Default: This does not require any configuration and is included by default when an Acropolis Hypervisor-based Nutanix cluster is installed. When an AHV host becomes unavailable, the failed VMs that were running on the failed AHV host restart on the remaining hosts, depending on the available resources. Not all of the…