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Cloud Computing & DevOps vocabulary · Reliability and Incidents

High availability

Meaning in cloud computing & devops, with examples

nounCommon term

In cloud computing & devops, high availability means: Designing a system so that it stays up almost all the time, with no single part whose failure can stop the whole service.

In Turkish: yüksek erişilebilirlik, yüksek kullanılabilirlik, HA

How it is used

Shortened to HA, said 'H-A': 'HA setup', 'HA pair'. The adjective is 'highly available'. It usually means running in several availability zones with redundancy, load balancing and automatic failover.

Example sentences

  1. For high availability, the API runs in three zones behind one load balancer.

  2. High availability costs more, so we only use it for customer-facing services.

Common collocations

  • high availability setup
  • highly available
  • HA cluster
  • design for high availability
  • redundancyHaving extra copies of servers, network links, disks or data, so that the system keeps working if one of them fails.
  • failoverSwitching automatically or manually to a standby system, such as a database replica or a second region, when the main one fails.
  • availability zoneOne of several separate data center locations inside a cloud region, each with its own power and network, so a failure in one should not affect the others.
  • uptimeThe time or percentage of time that a system is working and available, often written as a figure such as 99.9 percent over a month or a year.
  • load balancerA service that receives incoming traffic and spreads it across several servers, sending requests only to the ones that are healthy.

This word in other fields

The same English word can have a different meaning in another field:

More terms: Reliability and Incidents

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