Businesses are more reliant than ever on the servers and infrastructure providing connected access to their services. These systems and applications are in constant use and have high demands and expectations for availability using terms like five nines (99.999 percent uptime) or industry-standard uptime.
Now more than ever, it is imperative for companies and owners to have disaster recovery at the forefront of their minds. Not only are local backups important, but off-server backups are the second layer of protection from a system failure that could make even local backups unavailable for restoring essential data.
High availability is the description of a system designed to be fault-tolerant, highly dependable, operates continuously without intervention, or having a single point of failure. These systems are highly sought after to increase the availability and uptime required to keep an infrastructure running without issue. The following characteristics define a High Availability system.