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The Ultimate Guide to Database High Availability

Percona

Defining high availability In general terms, high availability refers to the continuous operation of a system with little to no interruption to end users in the event of hardware or software failures, power outages, or other disruptions. If a primary server fails, a backup server can take over and continue to serve requests.

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Setting Up and Deploying PostgreSQL for High Availability

Percona

The tolerable downtime depends on business size, operations, and objectives, but that downtime must be minimal to minuscule (see the “Measuring high availability” chart below). HA in PostgreSQL databases delivers virtually continuous availability, fault tolerance, and disaster recovery. Test the setup.

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Progress Delayed Is Progress Denied

Alex Russell

Thanks to the Web Platform Tests project and wpt.fyi , we have the makings of an answer for the first: Tests that fail only in a given browser. wpt.fyi 's new Compat 2021 dashboard narrows this full range of tests to a subset chosen to represent the most painful compatibility bugs : Stable-channel Compat 2021 results over time.

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