MongoDB

Prepare two test servers.Main 10.0.0.3From 10.0.0.4One, two servers install MongoDB databaseFirst step: Create a good directoryMkdir-p/data_master/tools/cd/data_master/tools/Step two: Download the installation package and unzip it#下载Curl-o

One, the installation of the Windows MongoDBMONGODB provides pre-compiled binaries for both 32-bit and 64-bit systems, which you can download from MongoDB website, MongoDB precompiled binary package: https://www.mongodb.com/download-center#community

This article will introduce the next MongoDB master-slave configuration and backup MongoDB is a database based on distributed file storage. Written by the C + + language. Designed to provide scalable, high-performance data storage solutions

1. Aggregation function Total number of queries. COUNT () >Db.userinfo.count ()3> Db.userinfo.Find(){ "_id":1,"name":"Uncle Guo","Sex":"male"," Age":" the" }{ "_id":2,"name":"Miss Guo","Sex":"male"," Age":"Unknown" }{

I. Management of MONGODB database: MONGOView All Database listsShow DBSSecond, create a databaseCreate a databaseUse studentIf you really want to create this database successfully, insert the data (collections). There is no need to create a

Pymongo is what Pymongo is a driver that enables Python programs to be written using a MongoDB database using Python. Installation environment: Ubuntu 14.04+PYTHON2.7+MONGODB 2.4 Go to the official website to download the package, address click Open

It took two days to learn MongoDB, and today came into contact with MONGO's master-slave configuration, to write it down1.　　Open two MONGO server (for a master one from, no security validation related parameters: can be viewed with mongd-help)Mongod-

I. Conceptual understanding1. User conceptMongoDB users are composed of user name + owning library nameFor example:Login MONGO testdb1, create user TestUserLogin MONGO TESTDB2, create user testuserbr/> the user created above is:[email protected],

Master configurationThis machine: 192.168.100.23:27017/etc/mongodb/mongo.conf Port = 27017DBPath =/data/mongodb_tLogPath =/var/log/mongodb_t.logLogappend = TrueJournal = TrueFork = True 1. The above configuration single-machine open

I. Connect MONGODB databaseThe following actions, by default, are based on the above action (successful connection)Second, the various posture of the check1) query by primary key _id, note: _id is not directly represented by a string, but with the

This article describes an example: using Pymongo to connect MongoDB, querying string Records in MongoDB, and comparing the similarity between strings.One, Python connects MongoDBApproximate steps: Create mongoclient---> Get DataBase---> Get

1. How to start the MongoDB databaseReference Address: http://www.runoob.com/mongodb/mongodb-window-install.htmlIn the location of the database installation, the Bin folder, enter Mongod--dbpath d:\data\dbD:\data\db is the folder where the data is

The Indexed organization table for mysq,oracle is the data stored in the primary key order (in-page).If the data insertion order is inconsistent with the primary key, there is no guarantee that the pages will be stored in a physical order. The cost

This is my first blog, many have insufficient please advise, talk not much, straight into the topicReason: Because of the large amount of MONGODB data, occupy a large space, so decided to transfer the data directory to another diskOne, check disk

Install database MongoDB startup times "System error 2 occurred."The problem is that if you've already installed it once, and two times the installation directory is different, you'll definitely encounter it, because the path you installed earlier

The previous blog post describes how the collation collations is manipulated and set up. Incidentally, some of the aggregation aggregation are set up in this way. This article continues to describe aggregation operations.The operation of the

The tests reproduced on the Internet are for reference only. Original address: Http://www.mongoing.com/benchmark_3_0This test process uses the 2 class machine. The tests are conducted in single-machine, single-instance cases. Machine A

Mongodbis a database based on distributed file storage. Written by the C + + language. Designed to provide scalable, high-performance data storage solutions for Web applications. Mongodbis a product between a relational database and a non-relational

1, official website Download Mongodb-win32-x86_64-2008plus-ssl-3.4.6-signed.msi installation package2. Install to D:\database\mongoDB (new this directory folder)3, to the Bin folder, see the Mongod.exe command, or the environment variable

MongoDB uses the update () and Save () methods to update the documents in the collection. Next, let's take a look at the application of the two functions and their differences. Update () methodThe update () method is used to update a document