MongoDB

Information about MongoDB is now less, and most of the English site, most of the above content by the author translated from the official website, please translate or understand the error point please testify. After that I will continue to focus on

Mongo DB is a non-relational database (NOSQL) that is currently very popular in the IT industry, and its flexible data storage methods are favored by current it practitioners. Mongo db is a good way to implement object-oriented thinking, in Mongo db,

Information about MongoDB is now less, and most of the English site, most of the above content by the author translated from the official website, please translate or understand the error point please testify. After that I will continue to focus on

Dependent Packages:1.pymongo2.jieba#-*-Coding:utf-8-*-"""@author: Jiangfuqiang"""From Htmlparser import HtmlparserImport Urllib2Import SysImport PymongoImport timeImport JiebaImport Tracebackdefault_encoding = ' Utf-8 'If sys.getdefaultencoding ()! =

MongoDB's map reduce usesExample:res = Db.runcommand ({MapReduce: ' Liveepguservisits ',Map:function () {Emit ({Provice:this.provice}, {"Data": [{"Mac": This.mac}],visit:this.visitnum, usercount:0});},Reduce:function (key, value) {var ret = {data:[]}

First, the Mongobackup file package that someone else wrote was applied. Go to this website download: http://pan.baidu.com/s/15YsBs Download the Mongobackup file to your MongoDB bin directory Input chmod a+x mongobackup//Let the system compile it

1, InsertMongoDB is database storing document object, the type of which is called Bson. (like JSON);Example://Document DefinationNow after using Command[db.posts.insert (DOC), you'll insert record successfully if seeing theThe following picture.2.

MongoDB Official Download Station is http://www.mongodb.org/downloads, can go up to download the latest program down.As you can see on the download page, the operating system support is comprehensive, OS X, Linux, Windows, Solaris are all supported,

I. Configuring the Yum package management fileCreate file /etc/yum.repos.d/mongodb.repoIf the contents of the 64-bit system file are as followsVim/etc/yum.repos.d/mongodb.repo[mongodb]name=mongodb repositorybaseurl=gpgcheck=0enabled=1If this is a 32

First, environment and start-upMongoDB Direct download back decompression can be used. For example, I unzipped to the App/mongo directory. And in the Appmongo directory, the data/db directory is used to present a folder for MongoDB database data.The

After the successful start of MongoDB, and then open a command line window input MONGO, you can do some of the database operations. Enter help to see the basic Operations Command, but MongoDB does not have a command to create a database, but there

1 #Coding=utf-82 fromPymongoImportmongoclient3 4 defGet_all_ids (collection):5 foreachinchcollection.find ():6 yieldeach['_id']7 8 defCompare_dict (This, other):9 delthis['_id']Ten delother['_id'] One returnthis = =

#!/bin/bash# this script run at 00:00# the nginx logs path#  Zhengyansheng time:2014-08-27# qq 467754239logs_path= "/usr/local/nginx/logs/" access_dir= "/usr/ Local/nginx/logs/insert_mongodb "mkdir -p ${logs_path}$ (date -d " Yesterday " +"%Y ")/$ (

1. Compile or download the corresponding DLL dynamic link library extension file: Dot me, do not know how to compile DLL extension under Windows, dot I2. Locate the Web server software, such as Apache,nginx, etc. webserver processing the browser

Download the installation Kithttp://www.mongodb.org/Installed MongoDBSystemlog: destination:file path:e:\mongodb\log\mongo.lognet: bindip:127.0.0.1 Port: 27017storage: dbpath:e:\mongodb\data\db directoryperdb:truePerform

One, mongodb Data Update commandMongoDB Update has two commands: Update, save.1.1update commandUPDATE command format:Db.collection.update (Criteria,objnew,upsert,multi)Parameter description:Criteria: Query criteriaObjnew:update objects and some

The form of update in MongoDB is this:Db.collectionName.update (query, obj, Upsert, multi);For Upsert (False by default): If upsert=true, if query finds rows that match the criteria, the rows are modified, and if they are not found, a row is

indexing is the most direct means of optimizing a database. Following the index optimization guidelines, you can establish more efficient and reasonable indexes.All columns that contain conditions in the index can be used to reject inappropriate

1. Replica setEach replica set needs to set the replica set name. Specified when the Mongod is started.2. Build Step 2.1 StartFirst start Mongod set to replica set mode when startup, and set the name. Two ways, either through configuration files, or

First step: Open cmd, run Mongo.exeStep two: Referencing the database that needs to be loadedUse database name//If the database name does not exist, MongoDB will automatically establish the databaseStep Three: Assign a value to create a Document