一、下载安装
安装Mongo数据库:2.0.7(支持win32)
在发布本文的时间官方提供的最新版本是:1.6.5 ,如果不做特殊声明,本教程所用的版本将会是这个版本。
- 第一步:下载安装包:官方下载地址←单击此处,如果是win系统,注意是64位还是32位版本的,请选择正确的版本。
- 第二步:新建目录“D:\MongoDB”,解压下载到的安装包,找到bin目录下面全部.exe文件,拷贝到刚创建的目录下。
- 第三步:在“D:\MongoDB”目录下新建“data”文件夹,它将会作为数据存放的根文件夹。
配置Mongo服务端:
打开CMD窗口,按照如下方式输入命令:
> d:
> cd D:\MongoDB
> mongod --dbpath D:\MongoDB\data
配置成功后会看到如下画面:
在浏览器输入:http://localhost:27017/,可以看到如下提示:
You are trying to access MongoDB on the native driver port. For http diagnostic access, add 1000 to the port number
如此,MongoDB数据库服务已经成功启动了。
二、在Windows中注册MongoDB服务
MongoDB以Windows服务安装(Windows 32-bit)
一.准备工作
1:下载: http://www.mongodb.org/downloads 选择Windows 32-bit
2:解压到ZIP到 D:\Mongodb ,在此目录下再建立2个目录 D:\Mongodb\db和D:\Mongodb\logs ,
在D:\Mongodb\logs 新建MongoDB.log文件
二.安装
1.开始--运行--cmd
2.cd D:\Mongodb\bin
3.D:\Mongodb\bin>mongod --logpath D:\MongoDB\logs\MongoDB.log --logappend --dbpath D:\MongoDB\db --directoryperdb --serviceName MongoDB
--install
如果安装成功,显示下面文字
all output going to: D:\MongoDB\logs\MongoDB.log
Creating service MongoDB.
Service creation successful.
Service can be started from the command line via 'net start "MongoDB"'.
强调
1:log一定要指定一个xxx.log文件(文件不存在也要这么写,会自动创建,写成这样是不可以的--logpath d:\mongodb\logs)
2:serviceName的N字母要大写
注意:这条命令要到MongoDB的bin目录下运行,刚开始的时候,我就直接在D:\下运行,结果服务的可执行目录为【"D:\mongod" --logpath "D:\MongoDB\logs\MongoDB.log" --logappend --dbpath "D:\MongoDB\db" --directoryperdb --service 】,肯定是不对的。
该命令行指定了日志文件:D:\MongoDB\logs\MongoDB.log,日志是以追加的方式输出的;
数据文件目录:D:\MongoDB\db,并且参数--directoryperdb说明每个DB都会新建一个目录;
Windows服务的名称:MongoDB;
以上的三个参数都是可以根据自己的情况而定的,呵呵。
最后是安装参数:--install,与之相对的是--remove
启动MongoDB:net start MongoDB
停止MongoDB:net stop MongoDB
三、常用命令行操作
MongoDB是一个NoSQL数据库系统:一个数据库可以包含多个集合(Collection),每个集合对应于关系数据库中的表;而每个集合中可以存储一组由列标识的记录,列是可以自由定义的,非常灵活,由一组列标识的实体的集合对应于关系数据库表中的行。下面通过熟悉MongoDB的基本管理命令,来了解MongoDB提供的DBMS的基本功能和行为。
MongoDB命令帮助系统
在安装MongoDB后,启动服务器进程(mongod),可以通过在客户端命令mongo实现对MongoDB的管理和监控。看一下MongoDB的命令帮助系统:
- root@dev2:~# mongo
- MongoDB shell version: 1.8.3
- connecting to: test
- > help
- db.help() help on db methods
- db.mycoll.help() help on collection methods
- rs.help() help on replica set methods
- help connect connecting to a db help
- help admin administrative help
- help misc misc things to know
- help mr mapreduce help
- show dbs show database names
- show collections show collections in current database
- show users show users in current database
- show profile show most recent system.profile entries with time >= 1ms
- use <db_name> set current database
- db.foo.find() list objects in collection foo
- db.foo.find( { a : 1 } ) list objects in foo where a == 1
- it result of the last line evaluated; use to further iterate
- DBQuery.shellBatchSize = x set default number of items to display on shell
- exit quit the mongo shell
root@dev2:~# mongo MongoDB shell version: 1.8.3 connecting to: test > help db.help() help on db methods db.mycoll.help() help on collection methods rs.help() help on replica set methods help connect connecting to a db help help admin administrative help help misc misc things to know help mr mapreduce help show dbs show database names show collections show collections in current database show users show users in current database show profile show most recent system.profile entries with time >= 1ms use <db_name> set current database db.foo.find() list objects in collection foo db.foo.find( { a : 1 } ) list objects in foo where a == 1 it result of the last line evaluated; use to further iterate DBQuery.shellBatchSize = x set default number of items to display on shell exit quit the mongo shell
这是MongoDB最顶层的命令列表,主要告诉我们管理数据库相关的一些抽象的范畴:数据库操作帮助、集合操作帮助、管理帮助。如果你想了解数据库操作更详细的帮助命令,可以直接使用db.help(),如下所示:
- > db.help()
- DB methods:
- db.addUser(username, password[, readOnly=false])
- db.auth(username, password)
- db.cloneDatabase(fromhost)
- db.commandHelp(name) returns the help for the command
- db.copyDatabase(fromdb, todb, fromhost)
- db.createCollection(name, { size : ..., capped : ..., max : ... } )
- db.currentOp() displays the current operation in the db
- db.dropDatabase()
- db.eval(func, args) run code server-side
- db.getCollection(cname) same as db['cname'] or db.cname
- db.getCollectionNames()
- db.getLastError() - just returns the err msg string
- db.getLastErrorObj() - return full status object
- db.getMongo() get the server connection object
- db.getMongo().setSlaveOk() allow this connection to read from the nonmaster member of a replica pair
- db.getName()
- db.getPrevError()
- db.getProfilingLevel() - deprecated
- db.getProfilingStatus() - returns if profiling is on and slow threshold
- db.getReplicationInfo()
- db.getSiblingDB(name) get the db at the same server as this one
- db.isMaster() check replica primary status
- db.killOp(opid) kills the current operation in the db
- db.listCommands() lists all the db commands
- db.printCollectionStats()
- db.printReplicationInfo()
- db.printSlaveReplicationInfo()
- db.printShardingStatus()
- db.removeUser(username)
- db.repairDatabase()
- db.resetError()
- db.runCommand(cmdObj) run a database command. if cmdObj is a string, turns it into { cmdObj : 1 }
- db.serverStatus()
- db.setProfilingLevel(level,<slowms>) 0=off 1=slow 2=all
- db.shutdownServer()
- db.stats()
- db.version() current version of the server
- db.getMongo().setSlaveOk() allow queries on a replication slave server
> db.help() DB methods: db.addUser(username, password[, readOnly=false]) db.auth(username, password) db.cloneDatabase(fromhost) db.commandHelp(name) returns the help for the command db.copyDatabase(fromdb, todb, fromhost) db.createCollection(name, { size : ..., capped : ..., max : ... } ) db.currentOp() displays the current operation in the db db.dropDatabase() db.eval(func, args) run code server-side db.getCollection(cname) same as db['cname'] or db.cname db.getCollectionNames() db.getLastError() - just returns the err msg string db.getLastErrorObj() - return full status object db.getMongo() get the server connection object db.getMongo().setSlaveOk() allow this connection to read from the nonmaster member of a replica pair db.getName() db.getPrevError() db.getProfilingLevel() - deprecated db.getProfilingStatus() - returns if profiling is on and slow threshold db.getReplicationInfo() db.getSiblingDB(name) get the db at the same server as this one db.isMaster() check replica primary status db.killOp(opid) kills the current operation in the db db.listCommands() lists all the db commands db.printCollectionStats() db.printReplicationInfo() db.printSlaveReplicationInfo() db.printShardingStatus() db.removeUser(username) db.repairDatabase() db.resetError() db.runCommand(cmdObj) run a database command. if cmdObj is a string, turns it into { cmdObj : 1 } db.serverStatus() db.setProfilingLevel(level,<slowms>) 0=off 1=slow 2=all db.shutdownServer() db.stats() db.version() current version of the server db.getMongo().setSlaveOk() allow queries on a replication slave server
对数据库进行管理和操作的基本命令,可以从上面获取到。如果想要得到更多,而且每个命令的详细用法,可以使用上面列出的db.listCommands()查询。
另一个比较基础的是对指定数据库的集合进行操作、管理和监控,可以通过查询db.mycoll.help()获取到:
- > db.mycoll.help()
- DBCollection help
- db.mycoll.find().help() - show DBCursor help
- db.mycoll.count()
- db.mycoll.dataSize()
- db.mycoll.distinct( key ) - eg. db.mycoll.distinct( 'x' )
- db.mycoll.drop() drop the collection
- db.mycoll.dropIndex(name)
- db.mycoll.dropIndexes()
- db.mycoll.ensureIndex(keypattern[,options]) - options is an object with these possible fields: name, unique, dropDups
- db.mycoll.reIndex()
- db.mycoll.find([query],[fields]) - query is an optional query filter. fields is optional set of fields to return.
- e.g. db.mycoll.find( {x:77} , {name:1, x:1} )
- db.mycoll.find(...).count()
- db.mycoll.find(...).limit(n)
- db.mycoll.find(...).skip(n)
- db.mycoll.find(...).sort(...)
- db.mycoll.findOne([query])
- db.mycoll.findAndModify( { update : ... , remove : bool [, query: {}, sort: {}, 'new': false] } )
- db.mycoll.getDB() get DB object associated with collection
- db.mycoll.getIndexes()
- db.mycoll.group( { key : ..., initial: ..., reduce : ...[, cond: ...] } )
- db.mycoll.mapReduce( mapFunction , reduceFunction , <optional params> )
- db.mycoll.remove(query)
- db.mycoll.renameCollection( newName , <dropTarget> ) renames the collection.
- db.mycoll.runCommand( name , <options> ) runs a db command with the given name where the first param is the collection name
- db.mycoll.save(obj)
- db.mycoll.stats()
- db.mycoll.storageSize() - includes free space allocated to this collection
- db.mycoll.totalIndexSize() - size in bytes of all the indexes
- db.mycoll.totalSize() - storage allocated for all data and indexes
- db.mycoll.update(query, object[, upsert_bool, multi_bool])
- db.mycoll.validate() - SLOW
- db.mycoll.getShardVersion() - only for use with sharding
> db.mycoll.help() DBCollection help db.mycoll.find().help() - show DBCursor help db.mycoll.count() db.mycoll.dataSize() db.mycoll.distinct( key ) - eg. db.mycoll.distinct( 'x' ) db.mycoll.drop() drop the collection db.mycoll.dropIndex(name) db.mycoll.dropIndexes() db.mycoll.ensureIndex(keypattern[,options]) - options is an object with these possible fields: name, unique, dropDups db.mycoll.reIndex() db.mycoll.find([query],[fields]) - query is an optional query filter. fields is optional set of fields to return. e.g. db.mycoll.find( {x:77} , {name:1, x:1} ) db.mycoll.find(...).count() db.mycoll.find(...).limit(n) db.mycoll.find(...).skip(n) db.mycoll.find(...).sort(...) db.mycoll.findOne([query]) db.mycoll.findAndModify( { update : ... , remove : bool [, query: {}, sort: {}, 'new': false] } ) db.mycoll.getDB() get DB object associated with collection db.mycoll.getIndexes() db.mycoll.group( { key : ..., initial: ..., reduce : ...[, cond: ...] } ) db.mycoll.mapReduce( mapFunction , reduceFunction , <optional params> ) db.mycoll.remove(query) db.mycoll.renameCollection( newName , <dropTarget> ) renames the collection. db.mycoll.runCommand( name , <options> ) runs a db command with the given name where the first param is the collection name db.mycoll.save(obj) db.mycoll.stats() db.mycoll.storageSize() - includes free space allocated to this collection db.mycoll.totalIndexSize() - size in bytes of all the indexes db.mycoll.totalSize() - storage allocated for all data and indexes db.mycoll.update(query, object[, upsert_bool, multi_bool]) db.mycoll.validate() - SLOW db.mycoll.getShardVersion() - only for use with sharding
有关数据库和集合管理的相关命令,是最基础和最常用的,如集合查询、索引操作等。
基本命令及实例
下面通过实际的例子来演示一些常见的命令:
(一)基本命令
1、show dbs
- {
- "host" : "dev2",
- "version" : "1.8.3",
- "process" : "mongod",
- "uptime" : 845446,
- "uptimeEstimate" : 839192,
- "localTime" : ISODate("2011-12-27T04:03:12.512Z"),
- "globalLock" : {
- "totalTime" : 845445636925,
- "lockTime" : 13630973982,
- "ratio" : 0.016122827283818857,
- "currentQueue" : {
- "total" : 0,
- "readers" : 0,
- "writers" : 0
- },
- "activeClients" : {
- "total" : 0,
- "readers" : 0,
- "writers" : 0
- }
- },
- "mem" : {
- "bits" : 64,
- "resident" : 12208,
- "virtual" : 466785,
- "supported" : true,
- "mapped" : 466139
- },
- "connections" : {
- "current" : 27,
- "available" : 792
- },
- "extra_info" : {
- "note" : "fields vary by platform",
- "heap_usage_bytes" : 70895216,
- "page_faults" : 17213898
- },
- "indexCounters" : {
- "btree" : {
- "accesses" : 4466653,
- "hits" : 4465526,
- "misses" : 1127,
- "resets" : 0,
- "missRatio" : 0.00025231420484197006
- }
- },
- "backgroundFlushing" : {
- "flushes" : 14090,
- "total_ms" : 15204393,
- "average_ms" : 1079.0910574875797,
- "last_ms" : 669,
- "last_finished" : ISODate("2011-12-27T04:02:28.713Z")
- },
- "cursors" : {
- "totalOpen" : 3,
- "clientCursors_size" : 3,
- "timedOut" : 53
- },
- "network" : {
- "bytesIn" : 63460818650,
- "bytesOut" : 763926196104,
- "numRequests" : 67055921
- },
- "opcounters" : {
- "insert" : 7947057,
- "query" : 35720451,
- "update" : 16263239,
- "delete" : 154,
- "getmore" : 91707,
- "command" : 68520
- },
- "asserts" : {
- "regular" : 0,
- "warning" : 1,
- "msg" : 0,
- "user" : 7063866,
- "rollovers" : 0
- },
- "writeBacksQueued" : false,
- "ok" : 1
- }
{ "host" : "dev2", "version" : "1.8.3", "process" : "mongod", "uptime" : 845446, "uptimeEstimate" : 839192, "localTime" : ISODate("2011-12-27T04:03:12.512Z"), "globalLock" : { "totalTime" : 845445636925, "lockTime" : 13630973982, "ratio" : 0.016122827283818857, "currentQueue" : { "total" : 0, "readers" : 0, "writers" : 0 }, "activeClients" : { "total" : 0, "readers" : 0, "writers" : 0 } }, "mem" : { "bits" : 64, "resident" : 12208, "virtual" : 466785, "supported" : true, "mapped" : 466139 }, "connections" : { "current" : 27, "available" : 792 }, "extra_info" : { "note" : "fields vary by platform", "heap_usage_bytes" : 70895216, "page_faults" : 17213898 }, "indexCounters" : { "btree" : { "accesses" : 4466653, "hits" : 4465526, "misses" : 1127, "resets" : 0, "missRatio" : 0.00025231420484197006 } }, "backgroundFlushing" : { "flushes" : 14090, "total_ms" : 15204393, "average_ms" : 1079.0910574875797, "last_ms" : 669, "last_finished" : ISODate("2011-12-27T04:02:28.713Z") }, "cursors" : { "totalOpen" : 3, "clientCursors_size" : 3, "timedOut" : 53 }, "network" : { "bytesIn" : 63460818650, "bytesOut" : 763926196104, "numRequests" : 67055921 }, "opcounters" : { "insert" : 7947057, "query" : 35720451, "update" : 16263239, "delete" : 154, "getmore" : 91707, "command" : 68520 }, "asserts" : { "regular" : 0, "warning" : 1, "msg" : 0, "user" : 7063866, "rollovers" : 0 }, "writeBacksQueued" : false, "ok" : 1 }
有时,通过查看数据库服务器的状态,可以判断数据库是否存在问题,如果有问题,如数据损坏,可以及时执行修复。
- > db.stats()
- {
- "db" : "fragment",
- "collections" : 12,
- "objects" : 384553,
- "avgObjSize" : 3028.40198360174,
- "dataSize" : 1164581068,
- "storageSize" : 1328351744,
- "numExtents" : 109,
- "indexes" : 10,
- "indexSize" : 16072704,
- "fileSize" : 4226809856,
- "ok" : 1
- }
> db.stats() { "db" : "fragment", "collections" : 12, "objects" : 384553, "avgObjSize" : 3028.40198360174, "dataSize" : 1164581068, "storageSize" : 1328351744, "numExtents" : 109, "indexes" : 10, "indexSize" : 16072704, "fileSize" : 4226809856, "ok" : 1 }
显示fragment数据库的统计信息。
- > db.getCollectionNames()
- [
- "17u",
- "baseSe",
- "bytravel",
- "daodao",
- "go2eu",
- "lotour",
- "lvping",
- "mafengwo",
- "sina",
- "sohu",
- "system.indexes"
- ]
> db.getCollectionNames() [ "17u", "baseSe", "bytravel", "daodao", "go2eu", "lotour", "lvping", "mafengwo", "sina", "sohu", "system.indexes" ]
- > show dbs
- admin 0.03125GB
- local (empty)
- pagedb 0.03125GB
- test 0.03125GB
- > use LuceneIndexDB
- switched to db LuceneIndexDB
- > show dbs
- admin 0.03125GB
- local (empty)
- pagedb 0.03125GB
- test 0.03125GB
- > db
- LuceneIndexDB
- > db.storeCollection.save({'version':'3.5', 'segment':'e3ol6'})
- > show dbs
- LuceneIndexDB 0.03125GB
- admin 0.03125GB
- local (empty)
- pagedb 0.03125GB
- test 0.03125GB
- >
> show dbs admin 0.03125GB local (empty) pagedb 0.03125GB test 0.03125GB > use LuceneIndexDB switched to db LuceneIndexDB > show dbs admin 0.03125GB local (empty) pagedb 0.03125GB test 0.03125GB > db LuceneIndexDB > db.storeCollection.save({'version':'3.5', 'segment':'e3ol6'}) > show dbs LuceneIndexDB 0.03125GB admin 0.03125GB local (empty) pagedb 0.03125GB test 0.03125GB >
- > db.createCollection('replicationColletion', {'capped':true, 'size':10240, 'max':17855200})
- { "ok" : 1 }
- > show collections
- replicationColletion
- storeCollection
- system.indexes
> db.createCollection('replicationColletion', {'capped':true, 'size':10240, 'max':17855200}) { "ok" : 1 } > show collections replicationColletion storeCollection system.indexes
4、删除集合
删除集合,可以执行db.mycoll.drop()。
5、插入更新记录
直接使用集合的save方法,如下所示:
- > <EM>db.storeCollection.save({'version':'3.5', 'segment':'e3ol6'})</EM>
> db.storeCollection.save({'version':'3.5', 'segment':'e3ol6'})
更新记录,使用save会将原来的记录值进行覆盖实现记录更新。
6、查询一条记录
使用findOne()函数,参数为查询条件,可选,系统会随机查询获取到满足条件的一条记录(如果存在查询结果数量大于等于1)示例如下所示:
- > db.storeCollection.findOne({'version':'3.5'})
- {
- "_id" : ObjectId("4ef970f23c1fc4613425accc"),
- "version" : "3.5",
- "segment" : "e3ol6"
- }
> db.storeCollection.findOne({'version':'3.5'}) { "_id" : ObjectId("4ef970f23c1fc4613425accc"), "version" : "3.5", "segment" : "e3ol6" }
7、查询多条记录
使用find()函数,参数指定查询条件,不指定条件则查询全部记录。
8、删除记录
使用集合的remove()方法,参数指定为查询条件,示例如下所示:
- > db.storeCollection.remove({'version':'3.5'})
- > db.storeCollection.findOne()
- null
> db.storeCollection.remove({'version':'3.5'}) > db.storeCollection.findOne() null
9、创建索引
可以使用集合的ensureIndex(keypattern[,options])方法,示例如下所示:
- > use pagedb
- switched to db pagedb
- > db.page.ensureIndex({'title':1, 'url':-1})
- > db.system.indexes.find()
- { "name" : "_id_", "ns" : "pagedb.page", "key" : { "_id" : 1 }, "v" : 0 }
- { "name" : "_id_", "ns" : "pagedb.system.users", "key" : { "_id" : 1 }, "v" : 0}
- { "_id" : ObjectId("4ef977633c1fc4613425accd"), "ns" : "pagedb.page", "key" : {"title" : 1, "url" : -1 }, "name" : "title_1_url_-1", "v" : 0 }
> use pagedb switched to db pagedb > db.page.ensureIndex({'title':1, 'url':-1}) > db.system.indexes.find() { "name" : "_id_", "ns" : "pagedb.page", "key" : { "_id" : 1 }, "v" : 0 } { "name" : "_id_", "ns" : "pagedb.system.users", "key" : { "_id" : 1 }, "v" : 0} { "_id" : ObjectId("4ef977633c1fc4613425accd"), "ns" : "pagedb.page", "key" : {"title" : 1, "url" : -1 }, "name" : "title_1_url_-1", "v" : 0 }
上述,ensureIndex方法参数中,数字1表示升序,-1表示降序。
使用db.system.indexes.find()可以查询全部索引。
10、查询索引
我们为集合建立的索引,那么可以通过集合的getIndexes()方法实现查询,示例如下所示:
- > db.page.getIndexes()
- [
- {
- "name" : "_id_",
- "ns" : "pagedb.page",
- "key" : {
- "_id" : 1
- },
- "v" : 0
- },
- {
- "_id" : ObjectId("4ef977633c1fc4613425accd"),
- "ns" : "pagedb.page",
- "key" : {
- "title" : 1,
- "url" : -1
- },
- "name" : "title_1_url_-1",
- "v" : 0
- }
- ]
> db.page.getIndexes() [ { "name" : "_id_", "ns" : "pagedb.page", "key" : { "_id" : 1 }, "v" : 0 }, { "_id" : ObjectId("4ef977633c1fc4613425accd"), "ns" : "pagedb.page", "key" : { "title" : 1, "url" : -1 }, "name" : "title_1_url_-1", "v" : 0 } ]
当然,如果需要查询系统中全部的索引,可以使用db.system.indexes.find()函数。
11、删除索引
删除索引给出了两个方法:
- db.mycoll.dropIndex(name)
- db.mycoll.dropIndexes()
db.mycoll.dropIndex(name) db.mycoll.dropIndexes()
第一个通过指定索引名称,第二个删除指定集合的全部索引。
12、索引重建
可以通过集合的reIndex()方法进行索引的重建,示例如下所示:
- > db.page.reIndex()
- {
- "nIndexesWas" : 2,
- "msg" : "indexes dropped for collection",
- "ok" : 1,
- "nIndexes" : 2,
- "indexes" : [
- {
- "name" : "_id_",
- "ns" : "pagedb.page",
- "key" : {
- "_id" : 1
- },
- "v" : 0
- },
- {
- "_id" : ObjectId("4ef977633c1fc4613425accd"),
- "ns" : "pagedb.page",
- "key" : {
- "title" : 1,
- "url" : -1
- },
- "name" : "title_1_url_-1",
- "v" : 0
- }
- ],
- "ok" : 1
- }
> db.page.reIndex() { "nIndexesWas" : 2, "msg" : "indexes dropped for collection", "ok" : 1, "nIndexes" : 2, "indexes" : [ { "name" : "_id_", "ns" : "pagedb.page", "key" : { "_id" : 1 }, "v" : 0 }, { "_id" : ObjectId("4ef977633c1fc4613425accd"), "ns" : "pagedb.page", "key" : { "title" : 1, "url" : -1 }, "name" : "title_1_url_-1", "v" : 0 } ], "ok" : 1 }
13、统计集合记录数
use fragment
db.baseSe.count()
统计结果,如下所示:
- > use fragment
- switched to db fragment
- > db.baseSe.count()
- 36749
> use fragment switched to db fragment > db.baseSe.count() 36749
上述统计了数据库fragment的baseSe集合中记录数。
14、查询并统计结果记录数
use fragment
db.baseSe.find().count()
find()可以提供查询参数,然后查询并统计结果,如下所示:
- > use fragment
- switched to db fragment
- > db.baseSe.find().count()
- 36749
> use fragment switched to db fragment > db.baseSe.find().count() 36749
上述执行先根据查询条件查询结果,然后统计了查询数据库fragment的baseSe结果记录集合中记录数。
15、查询指定数据库的集合当前可用的存储空间
use fragment
> db.baseSe.storageSize()
142564096
16、查询指定数据库的集合分配的存储空间
> db.baseSe.totalSize()
144096000
上述查询结果中,包括为集合(数据及其索引存储)分配的存储空间。
(三)启动与终止
(四)安全管理
1、以安全认证模式启动
或者,也可以修改/etc/mongodb.conf,设置auth=true,重启mongod进程。