search
HomeDatabaseMysql TutorialMongoDB的PHP驱动方法与技巧

MongoDB的PHP驱动方法与技巧

Jun 07, 2016 pm 04:37 PM
mongodbphpcreateSkillmethodindexdrive

创建索引有时会阻塞新的连接 当与mongodb复制集建立连接时,驱动程序首先尝试连接并验证集群中每个非 隐藏的节点。如果一个节点是“down”状态,将跳过。然而,如果一个节点是“UP”状态,但是持有写锁,那么验证将没法执行下去,因此该驱动程序将被挂起了。

创建索引有时会阻塞新的连接

当与mongodb复制集建立连接时,驱动程序首先尝试连接并验证集群中每个非 隐藏的节点。如果一个节点是“down”状态,将跳过。然而,如果一个节点是“UP”状态,但是持有写锁,那么验证将没法执行下去,因此该驱动程序将被挂起了。 在mongodb 2.6版本前,在建立索引时的通病。所有的在前台或后台创建索引,在secondary端将在前台创建。 在PHP驱动程序的1.5.3版本会有所改进,在创建索引时,允许验证到second节点验证。

减少is_master_interval值

对于对可用性要求高的应用程序来说,建议检查默认的驱动程序运行时的配置设置。 mongo.is_master_interval选项控制着在复制集重新选举时驱动如何快速恢复。 is_master_interval选项默认值为15s,设置驱动发送“isMaster”请求每个mongod实例的时间间隔。这些请求帮助驱动程序判断复制集的拓扑结构,具体的来说,就是请求检测哪个节点是primary并可以接收写操作。 建议将该值设置为1或2秒,以让驱动程序在集群选举或故障转移时,能够迅速的定位到primary节点。当然啦,这也取决于有多少客户端以及ping的频率。 注意,当primary节点发生变化时,如选举或故障转移,总是会有几秒钟驱动程序会收到一个“MongoConnectionException” 信息 “No candidate servers found”。这些异常需要在你的代码中进行处理,否则会终止应用程序。

理解连接处理方式并配置连接TimeoutMS

PHP驱动程序不使用连接池。因此,建议你每个PHP进程创建一个连接。但是,如果web应用程序有许多PHP工作进程,将会创建很多新的数据库连接,PHP驱动程序不能共享进程之间的连接。因此,当网络节点慢,服务器繁忙时,PHP应用程序创建初始数据库连接时特别容易受到阻碍。 在这种情况下,建议你自定义connectionTimeoutMS 选项和注意php.ini中的mongo.ping_interval选项。 connectionTimeoutMS PHP驱动程序不显示的定义一个默认的连接超时。相反,默认值由php.ini文件中的default_socket_timeout选项决定,默认是60秒。连接将等待60秒断开,时间有些长,需要降低些。 强烈建议通过连接字符串的URI选项中显示设置connectionTimeoutMS选项。将其设置为5到30秒之间的值。 mongo.ping_interval mongo.ping_interval默认值为5秒。该选项设置驱动程序发送ping请求到每个mongod实例发现“down”节点的时间间隔,用于跟踪驱动程序的服务器黑名单。告诉驱动程序哪些节点忽略。 转自:http://mongodb.info/2014/05/29/new-blog-mongodb-driver-tips-tricks-php/

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
MySQL: Essential Skills for Beginners to MasterMySQL: Essential Skills for Beginners to MasterApr 18, 2025 am 12:24 AM

MySQL is suitable for beginners to learn database skills. 1. Install MySQL server and client tools. 2. Understand basic SQL queries, such as SELECT. 3. Master data operations: create tables, insert, update, and delete data. 4. Learn advanced skills: subquery and window functions. 5. Debugging and optimization: Check syntax, use indexes, avoid SELECT*, and use LIMIT.

MySQL: Structured Data and Relational DatabasesMySQL: Structured Data and Relational DatabasesApr 18, 2025 am 12:22 AM

MySQL efficiently manages structured data through table structure and SQL query, and implements inter-table relationships through foreign keys. 1. Define the data format and type when creating a table. 2. Use foreign keys to establish relationships between tables. 3. Improve performance through indexing and query optimization. 4. Regularly backup and monitor databases to ensure data security and performance optimization.

MySQL: Key Features and Capabilities ExplainedMySQL: Key Features and Capabilities ExplainedApr 18, 2025 am 12:17 AM

MySQL is an open source relational database management system that is widely used in Web development. Its key features include: 1. Supports multiple storage engines, such as InnoDB and MyISAM, suitable for different scenarios; 2. Provides master-slave replication functions to facilitate load balancing and data backup; 3. Improve query efficiency through query optimization and index use.

The Purpose of SQL: Interacting with MySQL DatabasesThe Purpose of SQL: Interacting with MySQL DatabasesApr 18, 2025 am 12:12 AM

SQL is used to interact with MySQL database to realize data addition, deletion, modification, inspection and database design. 1) SQL performs data operations through SELECT, INSERT, UPDATE, DELETE statements; 2) Use CREATE, ALTER, DROP statements for database design and management; 3) Complex queries and data analysis are implemented through SQL to improve business decision-making efficiency.

MySQL for Beginners: Getting Started with Database ManagementMySQL for Beginners: Getting Started with Database ManagementApr 18, 2025 am 12:10 AM

The basic operations of MySQL include creating databases, tables, and using SQL to perform CRUD operations on data. 1. Create a database: CREATEDATABASEmy_first_db; 2. Create a table: CREATETABLEbooks(idINTAUTO_INCREMENTPRIMARYKEY, titleVARCHAR(100)NOTNULL, authorVARCHAR(100)NOTNULL, published_yearINT); 3. Insert data: INSERTINTObooks(title, author, published_year)VA

MySQL's Role: Databases in Web ApplicationsMySQL's Role: Databases in Web ApplicationsApr 17, 2025 am 12:23 AM

The main role of MySQL in web applications is to store and manage data. 1.MySQL efficiently processes user information, product catalogs, transaction records and other data. 2. Through SQL query, developers can extract information from the database to generate dynamic content. 3.MySQL works based on the client-server model to ensure acceptable query speed.

MySQL: Building Your First DatabaseMySQL: Building Your First DatabaseApr 17, 2025 am 12:22 AM

The steps to build a MySQL database include: 1. Create a database and table, 2. Insert data, and 3. Conduct queries. First, use the CREATEDATABASE and CREATETABLE statements to create the database and table, then use the INSERTINTO statement to insert the data, and finally use the SELECT statement to query the data.

MySQL: A Beginner-Friendly Approach to Data StorageMySQL: A Beginner-Friendly Approach to Data StorageApr 17, 2025 am 12:21 AM

MySQL is suitable for beginners because it is easy to use and powerful. 1.MySQL is a relational database, and uses SQL for CRUD operations. 2. It is simple to install and requires the root user password to be configured. 3. Use INSERT, UPDATE, DELETE, and SELECT to perform data operations. 4. ORDERBY, WHERE and JOIN can be used for complex queries. 5. Debugging requires checking the syntax and use EXPLAIN to analyze the query. 6. Optimization suggestions include using indexes, choosing the right data type and good programming habits.

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
1 months agoBy尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. Best Graphic Settings
1 months agoBy尊渡假赌尊渡假赌尊渡假赌
Will R.E.P.O. Have Crossplay?
1 months agoBy尊渡假赌尊渡假赌尊渡假赌

Hot Tools

MinGW - Minimalist GNU for Windows

MinGW - Minimalist GNU for Windows

This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

WebStorm Mac version

WebStorm Mac version

Useful JavaScript development tools

ZendStudio 13.5.1 Mac

ZendStudio 13.5.1 Mac

Powerful PHP integrated development environment

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor