High Availability Cluster

High-availability clusters (also known as HA Clusters or Failover Clusters) are server clusters that are used primarily for the purpose of mitigating the impact of hardware or system failure on the performance of the overall system. They operate by having redundant computers or nodes which are "fail-over" servers that are then used to provide service when a primary system component fails. Normally, if a server with a particular application crashes, the application will be unavailable until someone fixes the crashed server. HA clustering remedies this situation by detecting hardware/software faults, and immediately restarting the application on another system without requiring administrative intervention, a process known as Failover. As part of this process, clustering software may configure the node before starting the application on it. For example, appropriate filesystems may need to be imported and mounted, network hardware may have to be configured, and some supporting applications may need to be running as well.

HA clusters are often used for critical databases, file sharing on a network, business applications, and customer services such as electronic commerce websites.

BluegrassNet is in the business of building our customers private Linux based High-Availability Clusters for web applications as pictured above. This mitigates the impact of hardware failure, excessive traffic, excessive SQL queries, and other problem associated with active or mission-critical websites.

The Cluster Basics: We offer 3 types:

• active-passive
• active-active
• n-node

Pricing: This does not include hardware or network equipment. This is for the actual labor involved in setting up one of these clusters. Note:

• The term "node" does not necessarily mean a separate piece of hardware, instead, it means each instance of a Linux kernel running in the cluster is considered a node.
• There must be a minimum two servers
• $1500 to $3,000 per node for active-passive
• $2000 to $4,000 per node for active-active
• $3000/node for n-node minimum 3 nodes
• We will build this type of system wherever you want it. You are not tied to our data center.
• If you are economically challenged and would like to benefit from a system like this, you can always get a seat on BluegrassNet's H/A Cluster for between $25 to $100 per month depending on the specifics related to your website. More information is here.

To speak with a Rep or Engineer regarding what type of server would be right for you,  please give us a call: 502-589-4638