mongoc_collection_set_read_prefs - Man Page

void
mongoc_collection_set_read_prefs (mongoc_collection_t *collection,
                                  const mongoc_read_prefs_t *read_prefs);

• collection: A mongoc_collection_t.
• read_prefs: A mongoc_read_prefs_t.

Sets the default read preferences to use for operations on collection not specifying a read preference.

The global default is MONGOC_READ_PRIMARY: if the client is connected to a replica set it reads from the primary, otherwise it reads from the current MongoDB server.

Please see the MongoDB website for a description of Read Preferences.

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