OData callers can specify read-only intent in GET requests
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|Enabled for||Public preview||General availability|
|Admins, makers, marketers, or analysts, automatically||-||Oct 1, 2021|
Integrations that query data using OData can indicate a read-only intent to read data from a secondary database replica.
Integrations that consume data through OData from Business Central can indicate a read-only intent to use a read-only database replica. Indicating read-only intent is done by setting a request header on the OData call.
This will offload read-only queries from the primary database and give more read capacity for integrations that read large amounts of data.
Replicas are always in the transactionally consistent state, but at different points in time there may be some small latency between different replicas.
OData Services Settings (docs)