Replication (computing): Difference between revisions

Revision as of 01:52, 12 October 2021

Revision as of 01:53, 12 October 2021

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* '''Passive replication''', which involves processing every request on a single replica and transferring the result to the other replicas

When one leader replica is designated via [[leader election]] to process all the requests, the system is using a primary-backup or [[Master-slave (computers)|master primary-slavereplica]] scheme, which is predominant in [[high-availability cluster]]s. In comparison, if any replica can process a request and distribute a new state, the system is using a multi-primary or [[Multi-master replication|multi-master]] scheme. In the latter case, some form of [[distributed concurrency control]] must be used, such as a [[distributed lock manager]].

[[Load balancing (computing)|Load balancing]] differs from task replication, since it distributes a load of different computations across machines, and allows a single computation to be dropped in case of failure. Load balancing, however, sometimes uses data replication (especially [[multi-master replication]]) internally, to distribute its data among machines.