備份前的檢查
> show dbs
MyDB 0.0625GB
admin (empty)
bruce 0.0625GB
local (empty)
test 0.0625GB
> use MyDB
switched to db MyDB
> db.users.find()
{ "_id" : ObjectId("4e290aa39a1945747b28f1ee"), "a" : 1, "b" : 1 }
{ "_id" : ObjectId("4e2cd2182a65c81f21566318"), "a" : 3, "b" : 5 }
>

整庫備份：
mongodump -h dbhost -d dbname -o dbdirectory
-h：MongDB所在服務器地址，例如：127.0.0.1，當然也可以指定端口號：127.0.0.1:27017
-d：需要備份的數據庫實例，例如：test
-o：備份的數據存放位置，例如：c:/data/dump，當然該目錄需要提前建立，在備份完成后，系統自動在dump目錄下建立一個test目錄，這個目錄里面存放該數據庫實例的備份數據。

mongodump的官方說明(可通過mongodump --help查看)：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 ( /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 --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     if dbpath specified, each db is in a separate              directory --journal        enable journaling -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)

整庫恢復：
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