mongodb数据库备份不完整是什么原因？怎么解决？

C:\Users\Administrator>D:\tool\mongo\bin\mongodump --help

Export MongoDB data to BSON files.

options:

  --help                                produce help message

  -v [ --verbose ]                      be more verbose (include multiple times

                                        for more verbosity e.g. -vvvvv)

  --version                             print the program's version and exit

  -h [ --host ] arg                     mongo host to connect to ( <set

                                        name>/s1,s2 for sets)

  --port arg                            server port. Can also use --host

                                        hostname:port

  --ipv6                                enable IPv6 support (disabled by

                                        default)

  -u [ --username ] arg                 username

  -p [ --password ] arg                 password

  --authenticationDatabase arg          user source (defaults to dbname)

  --authenticationMechanism arg (=MONGODB-CR)

                                        authentication mechanism

  --dbpath arg                          directly access mongod database files

                                        in the given path, instead of

                                        connecting to a mongod  server - needs

                                        to lock the data directory, so cannot

                                        be used if a mongod is currently

                                        accessing the same path

  --directoryperdb                      each db is in a separate directly

                                        (relevant only if dbpath specified)

  --journal                             enable journaling (relevant only if

                                        dbpath specified)

  -d [ --db ] arg                       database to use

  -c [ --collection ] arg               collection to use (some commands)

  -o [ --out ] arg (=dump)              output directory or "-" for stdout

  -q [ --query ] arg                    json query

  --oplog                               Use oplog for point-in-time

                                        snapshotting

  --repair                              try to recover a crashed database

  --forceTableScan                      force a table scan (do not use

                                        $snapshot)

mongodump -h dbhost -d dbname -o dbdirectory

assertion: 18 { code: 18, ok: 0.0, errmsg: "auth fails" }

C:\Users\Administrator>D:\tool\mongo\bin\mongodump -username root -password 12345

6 -d test -o d:\tool\mongo\backup

C:\Users\Administrator>D:\tool\mongo\bin\mongodump -u root -p 12345