A failover cluster is a group of independent computers that work together to increase the availability of applications and services.
Clients can use the network name to access the resources in the group, similar to using a computer name to access the services on a physical server.However, because a failover cluster instance is a group, it can be failed over to another node without affecting the underlying name or address.If one of the cluster nodes fails, another node begins to provide service (a process known as failover).Users experience a minimum of disruptions in service.(WSFC) cluster is a group of independent servers that work together to increase the availability of applications and services.
SQL Server 2017 takes advantage of WSFC services and capabilities to support Always On availability groups and SQL Server Failover Cluster Instances.This guide describes the new quorum options in failover clusters in Windows Server® 2008 and provides steps for configuring the quorum in a failover cluster.By following the configuration steps in this guide, you can learn about failover clusters and familiarize yourself with quorum modes in failover clustering. Creating a cluster in Server 2008 using the command follows essentially the same process as creating a cluster by using the Microsoft Management Console (MMC) Failover Cluster Management snap-in.The process essentially consists of telling the Create Cluster Wizard the nodes that will be in the cluster and then the network name and static IP address (if dynamic IP isn’t used on the NICs).With the cluster validation wizard, you can run a set of focused tests on a collection of servers that you intend to use as nodes in a cluster.