MongoDB

Three elements: Database collection document (extended Bson of JSON)Service start restart stop: sudo service MongoDB start (Stop,restart)Modifying a configuration file/etc/mongodb.confAdd Smallfiles=trueView current Database dbView all databases

MongoDB is the old technology represented by NoSQL (without any discriminatory meaning), long time no research, re-study again1, installationDownload the Unzip installation packagewget

I remember a few days ago a small partner to check the MongoDB log, so as to troubleshoot problems, may not find the log where the logs, today, the system said MongoDB log system. There are four main types of logs in MongoDB. are system log, journal

Tag: Create database close. exe path width http color BPAAfter installation, enter CMD. Go to the Bin directory under the installation directory.Choose an empty directory and create a Db,log folder. After the terminal command line, enter a return.D:\

1. Download the MongoDB installation package to the following addresshttps://www.mongodb.org/dl/win32/The author of this article downloaded: mongodb-win32-x86_64-2008plus-ssl-v3.4-latest-signed.msiInstall when finished downloadingNext-> Custom,

Brief introductionMongoDB (from the English word "humongous", the Chinese meaning "huge") is an open-source database that can be applied to businesses of all sizes, industries and applications. As a database for agile development, MongoDB's data

Problem Description:Because the MongoDB database is not used for some time, there is a problem today, after entering the MongoDB database, execute show DBS and other commands basically will appear an error, as follows:MongoDB Enterprise > Show dbs;20

1. View all librariesShow DBS2. Switch database/New database Use MyDB3. View current LibraryDbIt is important to note that the This command does not immediately create a real entity library, but only when the data is inserted inside the library.4.

first, the environment preparation1, Centos72, mongodb3.4.103. Three machine IPs are: 192.168.1.100, 192.168.1.135, 192.168.1.136second, the installation of MONGDB database1, respectively in three machines for mongdb installation, specific reference

 A . MongoDB Connection NumberUnder the Linux platform, either 64-bit or 32-bit MONGODB default maximum connection number is 819,win platform do not know, estimated that no one in the win platform using MONGODB production environment[Email protected]

MongoDB clusters   Components: MONGOs: Request distribution config server Shard Shard data server   Three machine 192.168.174.128192.168.174.129192.168.174.130 Server Planning    port assignment: 

Overview of MongoDB Replication Sets A replica set is an additional copy of the data that is the process of synchronizing data across multiple servers, and the replication set provides the sink to add data availability, and the benefits of

MongoDB ShardIn MongoDB there is another cluster, that is, the Shard technology, can meet the requirements of a large number of MONGODB data volume growth.When MongoDB stores massive amounts of data, a machine may not be enough to store data, or it

Under Linux: Install MongoDB1. Download the installation packagewget linux/mongodb-linux-x86_64-rhel62-v3.6-latest.tgz2. Unzip the installation packageTar zxvf linux/mongodb-linux-x86_64-rhel62-v3.6-latest.tgz3. Move the installation package to/usr/

Import SysImport JSONImport PymongoImport datetimeFrom Pymongo import mongoclientClient = mongoclient (' mongodb://192.168.1.31:20000,192.168.1.34:20000 ')db = client. RhyCollection = db. St_river_rf = open ("D:/bigdata/st_river_r.csv")line =

One, MongoDB installation1. Download Mongodblinux version https://www.mongodb.com/download-center#community2. UnzipTar xvf mongodb-linux-x86_64-2.0.7.tgzMkdir/usr/local/mongodbMV mongodb-linux-x86_64-2.0.7/*/usr/local/mongodb3. Create a database

Docker pull MONGO (pulls image default latest version)Docker images (view image)Docker run-p 27017:27017-td MONGO (boot mirror)Docker PS (view boot image)Docker exec-it Mirror Id/bin/bash (Enter container)MONGO (enter MongoDB)Here are the steps to

1. Basic query ① Method Find (): Query db. collection name. Find ({conditional document}) ② method FindOne (): Query, returns only the first DB. Collection name. FindOne ({conditional document}) ③ method Pretty () : Formats the result of the DB.

First, let's review the basic operations of MongoDB:Database, collection, document Db,show dbs,use database name, drop database db. collection name. Insert ({}) db. collection name. Update ({condition},{$set: {}},{multi:true}) db. Collection name.

Note: This environment only applies to the CENTOS6 version of the system, version 7 does not need to be installed glibc#!/usr/bin/env python#coding:utf-8import osimport zipfileimport tarfileimport shutilline = Os.linesepscript_path = OS.GETCWD ()