Hyper-V Server Replication

Hyper-V Server Replication

Since Windows Server 2012 Hyper-V virtual machine (VM) replication technology has played an important part in guarding against server and infrastructure failure by replicating virtual machines to other locations whether in the same geographic location or across the internet to a replica site. In Windows Server 2019 Hyper-V replication has once again been revised and improved and has even more features than ever before, here’s what’s in the line-up:

Windows Fail-over Clustering

The ability to provide a group of computers (servers) that work together to increase the availability and scalability of clustered roles, if one or more servers fail other nodes begin to provide services with minimum disruption of services, Windows Fail over Clustering is normally found on servers running mission-critical business applications. These clusters provide “High Availability Computing” and typical examples include SQL Servers and Hyper-V Virtual Machines.

Hyper-V Replica

Used purely within disaster recovery (DR) technology, Hyper-V Replica maintains an updated copy or replica of a VM on another selected Hyper-V Host, using a replica enables change logs to be periodically forwarded and updated to the replica target in the event of a Hyper-V host failing the replica can be brought online either manually or automatically to allow for services to continue unhindered until such a time that the fault can be repaired and the primary server restored .

Hyper V cluster

Storage Replica

Introduced in Server 2016 Storage Replica provides block-level replication from any volume on a single server to another volume making it possible to stretch a Windows Fail-over Cluster geographically, previously a Data centre-only feature Windows Server 2019 now provides SR support in the standard edition.

Kubernetes and Windows Server 2019

Kubernetes is a relatively new portable, extensible, open-source platform for managing containerised workloads and services. It has a large, rapidly growing ecosystem and although it’s still very much work in progress there is much talk that Kubernetes could possibly replace Windows Fail-over Clustering for SQL Server 2019 HA in your on-premises data centre of Azure.

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