Classe « ReadPreference »

Méthode pymongo.ReadPreference.SECONDARY_PREFERRED

Signature de la méthode SECONDARY_PREFERRED

def SECONDARY_PREFERRED(selection) 

Description

SECONDARY_PREFERRED.__doc__

SecondaryPreferred read preference.

    * When directly connected to one mongod queries are allowed to standalone
      servers, to a replica set primary, or to replica set secondaries.
    * When connected to a mongos queries are distributed among shard
      secondaries, or the shard primary if no secondary is available.
    * When connected to a replica set queries are distributed among
      secondaries, or the primary if no secondary is available.

    .. note:: When a :class:`~pymongo.mongo_client.MongoClient` is first
      created reads will be routed to the primary of the replica set until
      an available secondary is discovered.

    :Parameters:
      - `tag_sets`: The :attr:`~tag_sets` for this read preference.
      - `max_staleness`: (integer, in seconds) The maximum estimated
        length of time a replica set secondary can fall behind the primary in
        replication before it will no longer be selected for operations.
        Default -1, meaning no maximum. If it is set, it must be at least
        90 seconds.
      - `hedge`: The :attr:`~hedge` for this read preference.

    .. versionchanged:: 3.11
       Added ``hedge`` parameter.