![]() Only takes effect if _concern is set to CUSTOM. if you want to ensure that writes are propagated to a specific number of replicas or given "tag set". This is useful in cases where the pre-defined configurations are not sufficient,Į.g. _concern_type Specifies a custom WriteConcern implementation type (fully-qualified name, class object or instance). This option is case insensitive and the default value is ACKNOWLEDGED. When set to CUSTOM, a custom WriteConcern implementation type has to be specified. Possible settings are (values of the WriteConcernType enum):ĪCKNOWLEDGED, UNACKNOWLEDGED, FSYNCED, JOURNALED, REPLICA_ACKNOWLEDGED, MAJORITY and CUSTOM.
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