mongodb相关操作命令(2)
Mongodb的备份工具mongodump
如果想备份数据库test 如：
[falcon@www.fwphp.cn ~/mongodb/bin]$ ./mongodump --help options:
--helpproduce help message
-h [ --host ] arg mongo host to connect to -d [ --db ] argdatabase to use
-c [ --collection ] arg collection to use (some commands) -u [ --username ] arg username
-p [ --password ] arg password
--dbpath arg directly access mongod data files in this path, instead of connecting to a mongod instance
-v [ --verbose ]be more verbose (include multiple times for more
verbosity e.g. -vvvvv)
-o [ --out ] arg (=dump) output directory
[falcon@www.fwphp.cn ~/mongodb/bin]$ [color=Blue]./mongodump -d test -o test/[/color] connected to: 127.0.0.1 DATABASE: testtotest/test
test.user to test/test/user.bson 100000 objects
test.system.indexes to test/test/system.indexes.bson 1 objects
[falcon@www.fwphp.cn ~/mongodb/bin]$ ls
2 mongo mongodump mongofiles mongorestore mongosniff dump mongod mongoexport mongoimport mongos test
MongoDB的数据恢复工具mongorestore
查看test库中的表 > show collections system.indexes User删除user表 > db.user.drop(); True
> show collections
System.indexes现在利用mongorestore表恢复刚才利用mongodump备份的数据 [falcon@www.fwphp.cn ~/mongodb/bin]$ ./mongorestore --help usage: ./mongorestore [options] [directory or filename to restore from] options:
--help produce help message
-h [ --host ] arg mongo host to connect to -d [ --db ] argdatabase to use
-c [ --collection ] arg collection to use (some commands) -u [ --username ] arg username -p [ --password ] arg password
--dbpath arg directly access mongod data files in this path, instead of connecting to a mongod instance
-v [ --verbose ] be more verbose (include multiple times for more verbosity e.g. -vvvvv)
[falcon@www.fwphp.cn ~/mongodb/bin]$ ./mongorestore -d test -c user test/test/user.bson connected to: 127.0.0.1 test/test/user.bson
going into namespace [test.user]
100000 objectsUser表中的10w条记录已经恢复 > show collections system.indexes user
> db.user.find();
{ "_id" : ObjectId("4b9c8db08ead0e3347000000"), "uid" : 1, "username" : "Falcon.C-1" } { "_id" : ObjectId("4b9c8db08ead0e3347010000"), "uid" : 2, "username" : "Falcon.C-2" } { "_id" : ObjectId("4b9c8db08ead0e3347020000"), "uid" : 3, "username" : "Falcon.C-3" } { "_id" : ObjectId("4b9c8db08ead0e3347030000"), "uid" : 4, "username" : "Falcon.C-4" } { "_id" : ObjectId("4b9c8db08ead0e3347040000"), "uid" : 5, "username" : "Falcon.C-5" } .................
has more
1. 超级用户相关：
#增加或修改用户密码 db.addUser('admin','pwd')
#查看用户列表 db.system.users.find()
#用户认证
db.auth('admin','pwd')
#删除用户
db.removeUser('mongodb')
#查看所有用户 show users
#查看所有数据库 show dbs
#查看所有的collection show collections
#查看各collection的状态 db.printCollectionStats()
#查看主从复制状态 db.printReplicationInfo()
#修复数据库
db.repairDatabase()
#设置记录profiling，0=off 1=slow 2=all db.setProfilingLevel(1)
#查看profiling show profile
#拷贝数据库
db.copyDatabase('mail_addr','mail_addr_tmp')
#删除collection db.mail_addr.drop()
#删除当前的数据库 db.dropDatabase()
2. 客户端连接
/usr/local/mongodb/bin/mongo user_addr -u user -p 'pwd'
3. 增删改
#存储嵌套的对象
db.foo.save({'name':'ysz','address':{'city':'beijing','post':100096},'phone':[138,139]})
#存储数组对象
db.user_addr.save({'Uid':'yushunzhi@sohu.com','Al':['test-1@sohu.com','test-2@sohu.com']})
#根据query条件修改，如果不存在则插入，允许修改多条记录 db.foo.update({'yy':5},{'$set':{'xx':2}},upsert=true,multi=true)
#删除yy=5的记录 db.foo.remove({'yy':5})
#删除所有的记录 db.foo.remove()
4. 索引
增加索引：1(ascending),-1(descending)
db.things.ensureIndex({firstname: 1, lastname: 1}, {unique: true});
#索引子对象
db.user_addr.ensureIndex({'Al.Em': 1})
#查看索引信息
db.deliver_status.getIndexes() db.deliver_status.getIndexKeys()
#根据索引名删除索引
db.user_addr.dropIndex('Al.Em_1')
5. 查询
查找所有 db.foo.find()
#查找一条记录 db.foo.findOne()
#根据条件检索10条记录
db.foo.find({'msg':'Hello 1'}).limit(10)
#sort排序
db.deliver_status.find({'From':'yushunzhi@sohu.com'}).sort({'Dt',-1}) db.deliver_status.find().sort({'Ct':-1}).limit(1)
#count操作 db.user_addr.count()
#distinct操作
db.foo.distinct('msg')
#>操作
db.foo.find({"timestamp": {"$gte" : 2}})
#子对象的查找
db.foo.find({'address.city':'beijing'})
6. 管理
查看collection数据的大小 db.deliver_status.dataSize()
#查看colleciont状态 db.deliver_status.stats()
#查询所有索引的大小
db.deliver_status.totalIndexSize()