Deprecated since version 1.4.0: Use mongoc_write_concern_set_journal() instead.

       MongoDB, Inc

       2009-present, MongoDB, Inc.

1.30.4                                            Jun 08, 2025                 MONGOC_WRITE_CONCERN_SET_FSYNC(3)

       Sets if a fsync must be performed before indicating write success.

       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.

       • write_concern: A mongoc_write_concern_t.

       • fsync_: A boolean.

          void
          mongoc_write_concern_set_fsync (mongoc_write_concern_t *write_concern,
                                          bool fsync_);

          Deprecated since version 1.4.0: Use mongoc_write_concern_set_journal() instead.