NAME

       mongoc_write_concern_t - Write Concern abstraction

SYNOPSIS

       mongoc_write_concern_t  tells  the  driver  what  level  of  acknowledgment to await from the server. The
       default, MONGOC_WRITE_CONCERN_W_DEFAULT, is right for the great majority of applications.

       You can specify a write concern on connection objects, database  objects,  collection  objects,  or  per‐
       operation.

       See Write Concern on the MongoDB website for more information.

WRITE CONCERN LEVELS

       MONGOC_WRITE_CONCERN_W_DEFAULT (1)
              By  default,  writes block awaiting acknowledgment from MongoDB. Acknowledged write concern allows
              clients to catch network, duplicate key, and other errors.

       MONGOC_WRITE_CONCERN_W_UNACKNOWLEDGED (0)
              With  this  write  concern,  MongoDB  does  not  acknowledge  the  receipt  of  write   operation.
              Unacknowledged  is  similar  to  errors  ignored;  however,  mongoc attempts to receive and handle
              network errors when possible.

       MONGOC_WRITE_CONCERN_W_MAJORITY (majority)
              Block until a write has been propagated to a majority of the nodes in the replica set.

       n      Block until a write has been propagated to at least n nodes in the replica set.

       journal
              Block until the node receiving the write has committed the journal.

DEPRECATION

       The  write  concern  MONGOC_WRITE_CONCERN_W_ERRORS_IGNORED  (value  ‐1)  is  a  deprecated  synonym   for
       MONGOC_WRITE_CONCERN_W_UNACKNOWLEDGED (value 0), and will be removed in the next major release.

COLOPHON

       This     page     is     part     of    MongoDB    C    Driver.     Please    report    any    bugs    at
       https://jira.mongodb.org/browse/CDRIVER.

MongoDB C Driver                                   2016‐01‐18                          MONGOC_WRITE_CONCERN_T(3)