collection mongo

first, three components of the cluster:MONGOs (query routers): Queries the route, takes care of the client connection, assigns the task to shards, and then collects the results. Config server: Configures the servers, saves the metadata information

IntroductionThe MONGO Shell is a interactive JavaScript interface to MongoDB. You can use the MONGO Shell to query and update data as well as perform administrative operations.The MONGO Shell is a component of the MongoDB distributions. Once you has

In addition to the documentation in the MongoDB Manual, the MONGO Shell provides some additional information in I TS "Online" Help system. This document provides a overview of accessing this Help information.Command line HelpThe list of options and

/***** PHP MongoDB learning notes *///*************************// ** connect to the MongoDB database ** // ***************************** // format => ("MongoDB: // username: password @ address: Port/default database specified ", parameter) $ conn =

This is a creation in Article, where the information may have evolved or changed. This article focuses on the use of MgO, only a simple introduction of MongoDB. MongoDB Features Mongdb Brief

TP already supports MongoDB database, here is a detailed description of the configuration and use of MONGO on TP. (1) There is a bug in the original class of/think/model/mongomodel.class.php in the tp3.2.2 version. We need to add some code to the

Recently, I started to learn how to install Mongo in windows. It is not difficult to perform this operation. I still use it in Linux. But refer to some documents after installation. The title error was found when Mongo was started. Finally, this

Mongo single device shard -- 22.16dbpleasecreateanindexovertheshardingkeybeforesharding uses a single index. If no index is found in the collection, the error config {_ id: shard1, members: [{_ id: 0, host: 127.0.0.1: 27018 },{ _ id: 1, host: 127.0.0

Mongo management and mongo management toolsMongo Management Based on ipv3.0, and 2.x versions may not be the same in some places.Install source (ubuntu) echo "deb http://repo.mongodb.org/apt/ubuntu "$(lsb_release -sc)"/mongodb-org/3.0 multiverse" |

Document directory MVCC Horizontal scalability Query expression Atomicity Durability Map reduce Javascript Rest Performance Use Cases Http://www.mongodb.org/display/DOCS/Comparing+Mongo+DB+and+Couch+DB,