mongodb shell tutorial

with $ 4. Cannot be included. (Point number) 5. Keys are case-sensitive and cannot be duplicated for example: {foo:1,foo:1} The naming of collections requires attention to the following points: 1. The collection name cannot be an empty string ("") 2. The collection name cannot contain the \ s character (null character), which represents the end of the collection name 3. The collection name cannot be "system." At the beginning, the prefix is reserved by the system itself 4. The collection name

": "Replsetinitiate quorum check failed because not all proposed set members responded affirmatively:192.168.176. 129:27017 failed with no route to host, 192.168.176.131:27017 failed with no route to host ","Code": 74} 5. View cluster status 　　 This entire replica set has been built. Let's test it now. The master node is responsible for the write operation, so we write on the 130 machine Repset:primary> Db.benxq.insert ({"name":"zhangsan"}) Perform read operations on 131 machines read Repset:se

MongoDB basic Tutorial: CURD help class, mongodbcurd I have been studying MongoDB for the last two days, a powerful document database. My biggest feeling is that compared with traditional relational databases such as SQL or MSQ, it is much simpler to use and configure. Both cluster configuration and Failover save a lot of tedious steps, but what is the most impor

Mongodb installation and configuration tutorial, doscommand, mongodbdos Download: you can download it from the official website. The default installation directory is (C: \ mongodb \) Create a data directory Create a data DIRECTORY And a log directory under the root directory. The data directory should be placed under the root directory (for example, C: \ da

After a short essay, the installation of MongoDB can be done after the most basic database operation, the following steps to achieve your Hello world!1. Open terminal Execution Brew services start MongoDB start MongoDB service, execute MONGO open shell operation;2. Show All DB: show dbs3. Enable a DB: Use mydb (if no m

layer we have the MongoDB driver encapsulated in the base Class library Inspur.Finix.DAL,Then, in the domain layer, the small three layer architecture mode is used to invoke the data service of the base component layer, and the presentation layer can use the return JSON string to implement the function of the page by invoking the business layer in the form of the service through the Ajax+json+filter way.Figure 5: Development mode2, the development of

MongoDB Series Tutorial (eight): Gridfs storageGridfs IntroductionMongoDB documents are stored in Bson format and support binary data types when we store binary format data directly into MongoDB's documentation. However, when files are too large, such as samples and videos, each document is limited in length, so MongoDB provides a canonical--gridfs for handling l

First, create a MongoDB backup directoryUsed to store datamkdir -p /data/mongodb_bak/mongodb_bak_nowmkdir-p /data/mongodb_bak/mongodb_bak_listIi. Creating a MongoDB database backup script#!/bin/bash#Dump=/usr/local/mongodb/bin/mongodump #mongodump命令路Path Out_dir=/data/mongodb_bak/mongodb_bak_now #临时备份目录Tar_dir=/data/mongodb_bak/mongodb_bak_list #备份存放路径Date= '

directory is \ data \ db of the drive where the service program is located. For example, D: \ data \ bin. The default listening port is 27017.2. MongoDB comes with a JavaScript Shell that can interact with MongoDB from the command line. For example, mongo. This Shell tool can directly execute simple mathematical opera

Tags: Shell linux MONGO#!/bin/bash port= "27017" start= "Nohup/usr/bin/mongod--config/etc/mongod.conf " email= "/bin/echo MongoDB |Mutt-s "Restart MongoDB" [email protected] " netstat-ln |awk '/^tcp/{print $4} ' |grep-q": $port $ "| | { #restart MongoDB eval $start; # $EMAIL exit $? } Exit 0The previous MONGO from the

PHP Tutorial: how to use shell scripts in PHP. As we all know, in computer science, SHELL is similar to command.com under DOS. It receives user commands and calls corresponding applications. It is also a programming language. We all know that in computer science, SHELLSimilar to command.com in DOS. It receives user commands and calls corresponding applications. I

Label:MongoDB Tutorial IntroductionWhat is MongoDB?MongoDB is written by the C + + language and is an open source database system based on distributed file storage.In the case of high load, adding more nodes can guarantee the performance of the server.MongoDB is designed to provide scalable, high-performance data storage solutions for Web applications.MongoDB sto

MongoDB uses keyfile access control to deploy replica sets (instance tutorial), mongodbkeyfileIntroduction Configure the replica set's mandatory access control: The internal authentication mechanism is used to ensure the security of replica set members. role-based access control is used to ensure the security of the connected client and replica set. In this tutorial