HIGH AVAILABILITY

Implementing a High Availability solution is measurement relative to “100% operational up time”. CAS Severn believes a business is only as strong as it’s weakest link. As an IT department, everyone that uses your systems is affected by how well you design it for the maximum “up time”. Working with your staff, CAS Severn Engineers can design and implement the “HA” components that position your systems for “five 9s” (99.999% or 5+ minutes downtime per year) of availability.

Designing and implementing Highly Available systems:
There are several considerations that need to be examined when designing for system availability. CAS Severn Engineering takes the time to talk with you and determine what combination of practices and resources will work for your business within your budget. We work with you to determine what data you need to replicate, which storage resources will be best suited to the job, which servers are right for the clusters, how the nodes will interconnect (LAN, WAN or OptiConnect), which applications can operate in a clustered environment and how the TCP/IP traffic will be affected.

As an example, the simplest high availability cluster configuration is a two-node cluster. This is typically configured to have one primary node for all cluster resources and a second node that is a backup, ready to take over during any outage of the primary system.

Another typical environment is the mutual takeover cluster. This allows for load balancing of resources and full take over only in a critical server down situation.

CAS Severn understands this multitude of considerations and has implemented clustering solutions across the entire line of servers, storage and operating systems that we support. We don't have to reinvent the wheel.