Specifies connection persistence when backends are unhealthy. The default value is DEFAULT_FOR_PROTOCOL. If set to DEFAULT_FOR_PROTOCOL, the existing connections persist on unhealthy backends only for connection-oriented protocols (TCP and SCTP) and only if the Tracking Mode is PER_CONNECTION (default tracking mode) or the Session Affinity is configured for 5-tuple. They do not persist for UDP. If set to NEVER_PERSIST, after a backend becomes unhealthy, the existing connections on the unhealthy backend are never persisted on the unhealthy backend. They are always diverted to newly selected healthy backends (unless all backends are unhealthy). If set to ALWAYS_PERSIST, existing connections always persist on unhealthy backends regardless of protocol and session affinity. It is generally not recommended to use this mode overriding the default. For more details, see Connection Persistence for Network Load Balancing and Connection Persistence for Internal TCP/UDP Load Balancing.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-03-24 UTC."],[[["This page details the `ConnectionPersistenceOnUnhealthyBackends` enum within the Google Cloud Compute V1 library, specifically across multiple versions, starting from version 1.0.0 all the way to the latest 3.6.0."],["The enum controls how connections are managed when backends become unhealthy, providing three distinct options: `AlwaysPersist`, `DefaultForProtocol`, and `NeverPersist`."],["The `DefaultForProtocol` setting allows connections to persist on unhealthy backends only for TCP and SCTP protocols, with the connections diverted for UDP."],["The `NeverPersist` setting will always redirect connections to newly selected healthy backends when an unhealthy backend is detected."],["The `AlwaysPersist` setting will force connections to remain on unhealthy backends, regardless of the protocol or session affinity, but is generally not the recommended setting."]]],[]]
