MongoDB

Recently, the security team detected that some Aliyun users exist MongoDB database unauthorized access vulnerabilities, vulnerabilities serious, easy to lead to database leaks. In order to ensure your business and application of security, please the

Index: A special data structure that stores a small portion of the data in a table to enable quick queries Advantages: 1, greatly reducing the amount of data the server needs to scan 2, the index can help the server avoid sorting or use temporary

The example of this article for everyone to share the Mongodb3.3 database for Gridfs additions and deletions, for your reference, the specific contents are as follows The Program.cs code is as follows: Internal class Program {private static

Principle: 1. First query the total number of records in the table 2. Random get Offset is 0~ total record number-1 3. Skip offset at query, and get 1 records Because I test the environment PHP has upgraded to more than 7.0, MongoDB extended Use

Why do you want to slice1. Reduce the number of single machine requests, reduce the single load, improve the total load2. Reduce the storage space of single machine, improve the total memory space. Common MongoDB sharding Server architecture

Using Gridfs file to MongoDB, return a Mongoid object, usually we need to save the $id value in this object in a string form to the database, as the identity of the file, then how does PHP take out the ID string value of the Mongoid object? Find

Command-line query: 1, you can use. * To fuzzy query, the following is the query surname Chen user. Db.customers.find ({name:/Chen */i});2, also can not carry * number Db.fs.files.find ({filename:/install_mongo.sh/i}) PHP Query: $query =array ("

Master/slave master-slave replicationmaster-slave replication MongoDB a common way, if you want to achieve a master-slave replication should have at least two MongoDB instance, one is responsible for the client request as the primary node, and the

MongoDB as a document database, support shard storage, scale-out, cluster automatic switch, the following summary configuration steps summarized as follows:Several important concepts:Database: Collection--record--cursor (tag ordinal at

InstallationDownload and install https://www.mongodb.com/on official websiteConfigurationMy Computer, right-click Properties, Advanced Program settings, environment variables in the list on the left　　Click Path　　Put your MongoDB file path in the

TODO:MONGODB MySQL Database backup1. MongoDB Using command BackupMongodump for the entire database backup, the main use of the command parameters: -D database to back up -O Output path ./mongodump–d Databasename–o/data/dbbak

Document Purposein the Install Mongodb application on Linux system and set basic security permissions to ensure database securityBasic KnowledgeMongoDB is based on a database for Distributed file storage . Written by the C + + language. Designed

First download the next MongoDB, the official website download, Https://www.mongodb.com/download-center?jmp=nav, according to their own system selection download,Then unzip: There will be this folder \mongodb\mongodb-src-r3.2.11\bin, the following

1.mongodb Introduction2.yum InstallationTo build a Yum Source:Vim/etc/yum.repos.d/mongodb-org-3.0.repo[mongodb-org-3.0]Name=monogodb Repositorybaseurl=http://repo.mongodb.org/yum/rehat/$releasever/mongodb-org/3.0/x86_64Gpgcheck=0Enabled=1Yum Install

centos5.6 32bitPHP 5.2.17PHP Installation Path/usr/local/phpPhpize Path/usr/binPhp-config Path/usr/binPHP.ini Path/etc/1. First download the PHP mongodb extensionDownload the MongoDB extension source package from the

I. Index and its optimization Overview of Indexes The index of a database is like a directory in front of a book that speeds up data queries. Appropriate places to increase the index, unreasonable place to delete suboptimal

Log on to MongoDB shell and switch to the admin databaseMongoUse adminCreate administrator userDb. createUser (  {User: "yourusername ",Pwd: "password ",Roles: [{role: "userAdminAnyDatabase", db: "admin"}]  })Modify/etc/init. d/mongod and restart

Creating an index sometimes blocks new connections.When establishing a connection with the mongodb replica set, the driver first tries to connect and verify each non-hidden node in the cluster. If a node is in the "down" status, it will be skipped.