What is a Cluster?
Cluster is known as a logical unit of file storage present on a hard disk. Any file stored on a hard disk uses storage space of one or more clusters. Clusters can be scattered among many different locations on the disk and keep track of all the files associated with them.
A backup cluster server is when a group of servers run together to form a server cluster to provide failover and increased availability of applications. This helps in backup for disaster recovery. Veeam cloud connect azure for the Enterprise delivers a cost-effective, highly flexible cloud approach for enterprise customers to maintain full control and data sovereignty over their entire enterprise backup infrastructure — whether they decide to store their remote office or workstation backups at the HQ data center or up in the public cloud.
Increase in resource availability: If one server in a cluster fails, the other servers in a cluster can carry the workload and offer support. This prevents loss of valuable time and there is no need to restart the process.
Increase in performance: Provides greater processing power.
Great Scalability: Ability to grow your resources as your needs and complexity grows.
Better resource usage: You can strategically distribute your projects across nodes, this will reduce overhead as not all machines need to be running all the projects at the same time.
Simpler management: Makes it easy to manage large and fast growing systems.
Clustering offers failover support which ensures that the system remains available for use if an application, project or node suffers failure. It offers load distribution in a way that upon failure, the project or application is switched to another node seamlessly.
Another way that it offers failover support is by request recovery. When a process fails, before distributing it to another node, the system requests a recovery task for that process or node. This enables users to continue the process without having to switch nodes. This is beneficial if there are no free nodes available at the moment.
Load balancing enables users to easily distribute user sessions and processes across different servers so that no single system is over loaded with excessive load. This is extremely useful when it is difficult to predict exactly how much requests a server will receive.
Load is usually calculated by the number of user sessions on a single node. If all nodes in a system start to become over crowded it distributes it among other servers. Veeam backup virtual appliance is used for backup and replication purpose.
Clustering gives users, a better control over their systems and provides them with better work load management options. It is essential for any complex workload as it makes it easy to distribute loads and offers failover support as well, along with backup for disaster recovery.