MongoDB

Server architecture:角色 ip地址 端口主服务器 192.168.8.81 27017从服务器 192.168.8.82 27017Primary server configuration:Vim mongodb.confport=27017dbpath=/data/dblogpath=/data/log/mongod.logfork =

Nodejs is a very powerful language, think and node want to contact the database I still like MongoDB, the following describes how to operate:1. Download MongoDB on the official website, then install the Fool one-click2. Under the path of installing

A summary of MongoDB knowledge points1.ObjectId 12 bit 4 time stamp +3 machine identification +2 process id+3 random numberGettimestamp ()STR ()2.Map Reduce performs a large amount of work decomposition and then merges the results into the final

1 Viewing the documentation for the current databaseInput:Db.media.find ()System returns:{"_id": ObjectId ("5aa490f053350e04ddbd6fa6"), "Type": "Book", "Title": "Definitive Guide to MongoDB 3rd ed.", "ISBN": "978-1-4842-1183-0", "Publisher": "Apress"

Download it and unzip it later.1. Create a Storage DB folder to store log files2. Create a xx.conf configuration file3. Configure the environment variable PATH variable to: /bin Directory4. Start Mongod--config xx.conf file directory5. Also open the

The difference between a shard and a partition:A. Shards:解决物理磁盘空间不足的问题（如果带索引，还可以优化查询，做到分区的功能）B. Partitioning:优化查询，防止一张表中过多的数据而导致查询缓慢C. Replication:防止数据库崩溃带来的损失，保证数据库的高可用Shard implementations:A. MongoDB:shardingB. mysql:mysql-clusterPartition

MongoDB cluster data query slow, db.collection.find () do not set the condition of the query is almost impossible to find out, by checking the status of each shard server in the cluster, found a machine status of Recoving. View the

Before looking at Windows install MongoDB operation is very simple, today in your own notebook installed, a variety of small problems. Refer to the online great god posts, and then record the next simple process to remember later.1.MongoDB official

MongoDB InstallationMongoDB ConfigurationCreate several folders as follows: Database path (\data\db\ directory), log path (\data\log\ directory), and log file (Mongod.log file)C:\data\log\C:\data\db\Creating a configuration file Mongod.cfgMongod.cfg

1.mongodb is document-based (BSON, JSON-like key-value pairs to store), not table-based, easy to scale horizontally, the internal related data can be put together to improve the operational performance of the database. If you want to create a new

The official MongoDB documentation shows that the overwrite query is the following query: All query fields are part of the index All the query return fields are in the same index Because all fields that appear in the query are part

1.NoSQL Introduction NoSQL, full name not only SQL, refers to a non-relational database With the increase in traffic, there is a problem with the database performance of the website, so NoSQL is designed Advantages and

First, the preparatory workSource file Mongodb-win32-x86_64-2008plus-ssl-3.4.10-signed.msiinstallation directory D:\mongodb1. Create several folders as follows: Database path (data directory), log path (logs directory), and log file (Mongo.log file)2

MongoDB useUpdate () function updates dataDescribeIn this section we will begin to learn how to update the collection data in MongoDB.The update () function can be used for MONGODB data updates.Db.collection.update (criteria, objnew, Upsert,

MongoDB DownloadMongoDB provides precompiled binary packages for 32-bit and 64-bit systems that you can download from the MongoDB official website, MongoDB precompiled binary package:Http://www.mongodb.org/downloadsExtractAfter downloading the zip

The Ongodb remove () function is used to remove data from the collection.The update () function can be used for MONGODB data updates. It is a good practice to execute the Find () command before executing the Remove () function to determine if the

DownloadMongoDB offers 32-bit and 64-bit installation packages on the Linux platform, which you can download on the website.: Http://www.mongodb.org/downloadsInstallationAfter the download is complete, unzip the ZIP package in the directory you

MongoDB Basic InformationMongoDB is an open-source NoSQL database implementation. The repository provides images of each version of MongoDB 2.2 ~ 2.7.How to useThe database is started by default on the 27017 port.-d mongoConnect to a container using

Two days ago in learning MongoDB related knowledge, did a small demo, do is the province below how many schools, well, do more rough ...Connect MongoDB first to add a MongoDB package through NuGet, download this packageStart writing code after

A. MongoDB installation1. Download in mongodb : Select Linux Legacy version:1. 2. Unzip the Linux system and configure the environment variables:Export mongodb_home=/usr/local/mongodb/mongodb-linux-x86_64-3.6.2Export path= $MONGODB _home/bin: $PATH3