What Does High Availability (HA) Mean?
High availability refers to systems that are durable and likely to operate continuously without failure for a long time. The term implies that parts of a system have been fully tested and, in many cases, that there are accommodations for failure in the form of redundant components.
Techopedia Explains High Availability (HA)
A lot of analysis of high availability in a system involves looking for the weakest link, whether that is a specific piece of hardware, or an element of the system, such as data storage. To enable more durable data storage, engineers seeking high availability can use a RAID design. Servers can also be set up to switch responsibilities to a remote server if necessary, in a backup process known as failover.
