Cloud Servers are well suited to being deployed as a Cloud Server cluster. Learn what a Cloud Server cluster is, the problems that a Cloud Server cluster can solve, and how clus­ter­ing a set of Cloud Servers can benefit your project.

Re­quire­ments

  • At least two Cloud Servers (any operating system)
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En­ter­prise-grade virtual private servers
  • KVM based dev servers for de­vel­op­ers
  • Scalable to en­ter­prise cloud level
  • Pay-as-you-go, per-minute billing

What Is Clus­ter­ing?

The term "cluster" simply means a group of linked servers (which are referred to as "nodes").

Clus­ter­ing has been a popular solution since the earliest days of mainframe computing. Cloud Computing has brought new interest to the concept of clus­ter­ing, due to the ease of creating a cluster and adding nodes, combined with the avail­abil­i­ty and per­for­mance demands of modern ap­pli­ca­tions.

Cloud Server clusters can be designed to share workloads, cen­tral­ize storage, provide fail-over services if one node fails, or isolate services.

Why Use a Server Cluster?

Cloud Server clusters can be set up to improve a project's:

Per­for­mance

On a single server, one component of a project typically takes up more resources than the others. This can drag down the per­for­mance of the entire server. Moving one or more com­po­nents to separate servers can improve the per­for­mance of the entire project.

Scal­a­bil­i­ty

A cluster is easy to scale hor­i­zon­tal­ly. For example, if a web server is at its limit for the amount of traffic it can handle, simply add a second web server and a load balancer.

Re­li­a­bil­i­ty

When your entire project is run on a single server, this creates a single point of failure. If that server goes down, the entire project is un­avail­able.

Clus­ter­ing allows you to set up secondary servers in order to provide higher avail­abil­i­ty and increase uptime.

Ease of Main­te­nance

Per­form­ing updates on a cluster can be handled without reducing your project's avail­abil­i­ty. Depending on the setup, in­di­vid­ual nodes in the cluster can be taken offline for main­te­nance without causing issues for your visitors.

Flex­i­bil­i­ty

A cluster allows you to add, remove, and change com­po­nents as much as you need, in order to suit the changing spec­i­fi­ca­tions of your project.

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