Classe « ReadPreference »

Méthode pymongo.ReadPreference.SECONDARY

Signature de la méthode SECONDARY

def SECONDARY(selection) 

Description

SECONDARY.__doc__

Secondary 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. An error is raised if no secondaries are available.
    * When connected to a replica set queries are distributed among
      secondaries. An error is raised if no secondaries are available.

    :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.