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mongodb備份和恢復
MongoDB提供了兩個命令用來備份(mongodump)和恢復(mongorestore)數(shù)據(jù),數(shù)據(jù)dump出來的格式是BSON的
1.mongodump 備份
用法:bin/mongodump [options]
舉例:將本機6666端口的數(shù)據(jù)庫備份到本機的/data/6666目錄下
bin/mongodump --port 6666 --directoryperdb -o /data/6666
connected to: 127.0.0.1:6666
all dbs
DATABASE: test to /data/6666/test
test.system.indexes to /data/6666/test/system.indexes.bson
1 objects
test.ints to /data/6666/test/ints.bson
4 objects
DATABASE: admin to /data/6666/admin
2.mongorestore 恢復
用法:bin/mongorestore [options] [directory or filename to restore from]
舉例:將數(shù)據(jù)庫test刪除,然后從備份目錄恢復
> show dbs
admin (empty)
local 4.201171875GB
test 0.203125GB
> use test
switched to db test
> db.dropDatabase()
{ "dropped" : "test", "ok" : 1 }
> show dbs
admin (empty)
local 4.201171875GB
使用mongorestore恢復
bin/mongorestore -host 127.0.0.1:6666 --directoryperdb /data/6666/
connected to: 127.0.0.1:6666
Wed Jul 6 16:37:33 /data/6666/test/ints.bson
Wed Jul 6 16:37:33 going into namespace [test.ints]
Wed Jul 6 16:37:33 4 objects found
Wed Jul 6 16:37:33 /data/6666/test/system.indexes.bson
Wed Jul 6 16:37:33 going into namespace [test.system.indexes]
Wed Jul 6 16:37:33 { name: "_id_", ns: "test.ints", key: { _id: 1 }, v: 0 }
Wed Jul 6 16:37:33 1 objects found
查看數(shù)據(jù)庫是否恢復
> show dbs
admin (empty)
local 4.201171875GB
test 0.203125GB
mongorestore有個參數(shù)--drop,使用此參數(shù),會先將集合里的數(shù)據(jù)都刪除了再恢復
就是說,如果你備份完數(shù)據(jù)后有新增數(shù)據(jù),那么使用--drop,新增的數(shù)據(jù)會不見
不使用此參數(shù),恢復備份的時候新增的數(shù)據(jù)依然存在
新聞名稱:mongodb備份和恢復
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