MongoDB

On the new version (2.***) of C # usage, there is basically no online. Yesterday to toss a half-day, to construct the server, found that the new version is not required, the document is such, the general meaning, do not need to get the server, like

　　I. The concept of read and write separation　　　　Read and write separation, the basic principle is to let the main database processing transaction increment, change, delete operation (INSERT, UPDATE, delete), and from the database processing select

/root directory:Get command:wget https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-3.4.4.tgzDecompression command:Tar zvxf mongodb-linux-x86_64-3.4. 4. tgzMove to the/usr/local/mongodb344 directory:MV mongodb-linux-x86_64-3.4. 4

1. Download MongoDB (64-bit)Http://fastdl.mongodb.org/linux/mongodb-linux-x86_64-2.4.9.tgztar ZXVF MONGODB-LINUX-X86_64-2.4.9.TGZCD mongodb-linux-x86_64-2.4.92, do not compile, itself is compiled binary executable file.Bsondump (export Bson

Gridfs IntroductionGridfs is a MONGODB specification for storing and retrieving large files, slices, audio files, video files, etc. This is a file system used to store files, but the data is stored in a MongoDB collection. Gridfs storage file is

Building a high-availability MongoDB cluster (iii)--deep inside the replica set internal mechanismIn the previous article, "Building a high-availability MongoDB cluster (ii)-Replica set" describes the configuration of the replica set, which delves

Insert six data:The query has duplicate data: Query and iterate delete duplicate data: Delete statement resolution: Db.userInfo.aggregate ([{$group: {_id: {userName: ' $userName ',Age : ' $age '},Count: {$sum: 1},dups: {$addToSet: ' $_id '}}}, {$

First, Numa introductionBefore introducing Numactl, you need to talk about what NUMA is, so that you can better understand numactl.NUMA (Non Uniform memory access Architecture) literally translates to "non-conforming RAM access", which first appears

First step: Start the database service1.cmd into the bin directory of MongoDB2. Enter: Mongod--dbpath "D:\ylkfSoft\mongoData\data\db" starts the database (the path behind--dbpath is the location of the database data that you randomly create after

When you start MongoDB, start the server first, and then start the clientStart the service side1. Find a directory where MongoDB data is stored, such as the D disk under Data2. Locate the bin directory under MongoDB3. Configure the data storage path

MongoDB is used in most cases as a module of data storage, and as a database, it should not generally assume more tasks.From a professional point of view, the task of text search to the professional search engine to take responsibility, is often a

I. PrincipleThe principle of Zabbix monitoring MongoDB is through echo "Db.serverstatus ()" | MONGO Admin to see the status of MongoDBTwo Server Configuration1) Add global variables for MONGO# vim/etc/profile.d/mongo.shExport Path=/usr/local/mongodb/

MongoDB 3.2 Installation and configuration on CentOS 2016-01-06 14:41:41 release Your rating:      0.0 Collection0 CollectionFirst,

MongoDB has three levels of distributed configuration: master-slave configuration, cluster configuration, and cluster shard configuration, we recommend using cluster configuration.Master-Slave configuration Start the primary server:

MongoDB Shard Overview ShardsIn 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

#!/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 mongodbeval $start; #

The following is the way to download the installation package decompression installation:Https://www.mongodb.com/download-center#community, can also self-Baidu First, unzip the downloaded installation package to the path where you want to

Use aggregation, db. Collection name. Aggregate... Rather than find.Pipelines are typically used in UNIX and Linux to use the output of the current command as a parameter to the next command.MongoDB's aggregation pipeline passes the MongoDB document

In the recent period of learning MongoDB, a total of more than 40 blogs have been written during the course of learning. From MongoDB software download to the construction of the Shard cluster. From the theoretical explanation to the practical

Practices and precautions for upgrading and downgrading primary and secondary nodes in the mongodb replica setConsiderations and practices for upgrading and downgrading primary and secondary nodes in the mongodb replica set This article is based