开始使用MongoDB

安装MongoDB

$sudo apt-get install mongodb

会自动安装libpcrecpp0 libboost-system1.42.0 libboost-filesystem1.42.0

libboost-program-options1.42.0 libboost-thread1.42.0 xulrunner-2.0-mozjs

mongodb-clients mongodb-server mongodb-dev mongodb 等依赖包。

$ps aux | grep mongod

$sudo apt-get install python-setuptools

$sudo easy_install pymongo

$sudo vim /etc/mongodb.conf

dbpath=’your datebase path’

logpath=’where to log’

logappend=true

bind_id=127.0.0.1

port=27017

进入数据库建立coolection数据库才算建立完成。使用

db.createCollection("mytestdb ", {capped:true, size:10000}) 单位是kb

或者db.runCommand( {createCollection:" mytestdb ", capped:true, size:100000} )

capped参数是建立固定大小的数据库文件，为了保证效率，mongo会在建立collection的时候占用磁盘空间，防止碎片。

> db.createCollection("mytestdb ", {capped:true, size:10000})

> show collections

db.mytestdb.ensureIndex({age:-1})

$python

>>> import pymongo

>>> cOnn= pymongo.Connection(host="localhost",port=27017)

>>> db=conn.mytestdb

>>> for user in db.wfcoll.find({}):

... repr(user)