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2. High availability - Wikipedia

   en.wikipedia.org/wiki/High_availability

   High availability (HA) is a characteristic of a system that aims to ensure an agreed level of operational performance, usually uptime, for a higher than normal period. [ 1 ] There is now more dependence on these systems as a result of modernization.

3. High availability software - Wikipedia

   en.wikipedia.org/wiki/High_availability_software

   High availability software is measured by its performance when a subsystem fails, its ability to resume service in a state close to the state of the system at the time of the original failure, and its ability to perform other service-affecting tasks (such as software upgrade or configuration changes) in a manner that eliminates or minimizes ...

4. High-availability cluster - Wikipedia

   en.wikipedia.org/wiki/High-availability_cluster

   High-availability clusters (also known as HA clusters, fail-over clusters) are groups of computers that support server applications that can be reliably utilized with a minimum amount of down-time. They operate by using high availability software to harness redundant computers in groups or clusters that provide continued service when system ...

5. Continuous availability - Wikipedia

   en.wikipedia.org/wiki/Continuous_Availability

   The terms high availability, continuous operation, and continuous availability are generally used to express how available a system is. [3] [4] The following is a definition of each of these terms. High availability refers to the ability to avoid unplanned outages by eliminating single points of failure. This is a measure of the reliability of ...

6. Heroku - Wikipedia

   en.wikipedia.org/wiki/Heroku

   Heroku Postgres is the Cloud database (DBaaS) service for Heroku based on PostgreSQL. Heroku Postgres provides features like continuous protection, rollback, and high availability; also forks, followers, and data clips. Heroku Redis Heroku Redis is the customized Redis from Heroku to provide a better developer experience. It is fully managed ...

7. Clustered web hosting - Wikipedia

   en.wikipedia.org/wiki/Clustered_web_hosting

   Clustered hosting is a type of web hosting that spreads the load of hosting across multiple physical machines, or node, increasing availability and decreasing the chances of one service (e.g., FTP or email) affecting another (e.g., MySQL). Many large websites run on clustered hosting solutions, for example, large discussion forums will tend to ...