NAME

       mongoc_write_concern_set_w - mongoc_write_concern_set_w()

SYNOPSIS

          void
          mongoc_write_concern_set_w (mongoc_write_concern_t *write_concern, int32_t w);

PARAMETERS

       • write_concern: A mongoc_write_concern_t.

       • w: A positive int32_t or zero.

DESCRIPTION

       Sets the w value for the write concern. See mongoc_write_concern_t for more information on this setting.

       Unacknowledged   writes   are  not  causally  consistent.  If  you  execute  a  write  operation  with  a
       mongoc_write_concern_t on which you have called mongoc_write_concern_set_w with a value of 0,  the  write
       does not participate in causal consistency, even when executed with a mongoc_client_session_t.

       Beginning  in  version  1.9.0, this function can now alter the write concern after it has been used in an
       operation. Previously, using the struct with an operation would mark it  as  "frozen"  and  calling  this
       function would log a warning instead instead of altering the write concern.

AUTHOR

       MongoDB, Inc

COPYRIGHT

       2018, MongoDB, Inc

1.9.3-dev                                         Feb 05, 2018                     MONGOC_WRITE_CONCERN_SET_W(3)