What is active MySQL?

An active/active configuration consists of two or more servers actively running a different database instance with each serving as a backup for each other. … cnf configuration file must reside in the MySQL data directory shared file system for each database instance (e.g. in Figure 2 below, /shr1/mysql and /shr2/mysql).

How can I tell if MySQL is active?

1) execute “mysql -uroot -p” and check if you are able to connect mysql, 2) check if you are able to connect your db from outside either sqlyog, mysqladmin etc.

What is MySQL and why it is used?

MySQL is a relational database management system based on SQL – Structured Query Language. The application is used for a wide range of purposes, including data warehousing, e-commerce, and logging applications. The most common use for mySQL however, is for the purpose of a web database.

What is status in MySQL?

SHOW STATUS; will give you status variables that have updated within your session. The command can also be expressed as SHOW SESSION STATUS; (As the MySQL Documentation says, it displays the status values for the current connection).

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What is MySQL and how it works?

Like most database management systems out there, MySQL has a client-server architecture and can be used in a networked environment. The server program resides on the same physical or virtual system where the database files are stored, and it is responsible for all interactions with the databases.

Can not connect MySQL server on localhost 10061?

The error (2003) Can’t connect to MySQL server on ‘server’ (10061) indicates that the network connection has been refused. You should check that there is a MySQL server running, that it has network connections enabled, and that the network port you specified is the one configured on the server.

What should I initialize after installing MySQL?

After MySQL is installed, the data directory must be initialized, including the tables in the mysql system database: For some MySQL installation methods, data directory initialization is automatic, as described in Chapter 9, Postinstallation Setup and Testing.

What is difference between SQL and MySQL?

In a nutshell, SQL is a language for querying databases and MySQL is an open source database product. SQL is used for accessing, updating and maintaining data in a database and MySQL is an RDBMS that allows users to keep the data that exists in a database organized. SQL does not change (much), as it is a language.

Why MySQL is used with PHP?

MySQL is a first choice of PHP developers. As an open source Relational Database Management System (RDBMS) that uses SQL language, MySQL database helps to automate data retrieving and provide great support in PHP MySQL web application development.

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What MySQL used for?

MySQL is a database management system.

To add, access, and process data stored in a computer database, you need a database management system such as MySQL Server.

What are status variables?

A variable is either defined or undefined, and its definition status can change during program execution. A complex or character scalar object is defined if and only if all of its subobjects are defined. … If an object is undefined, at least one of its subobjects is undefined.

How do I check SQL database status?

To verify the current state of a database, select the state_desc column in the sys. databases catalog view or the Status property in the DATABASEPROPERTYEX function.

Is status a SQL keyword?

You’re correct that STATUS is a keyword, likely owing to SHOW STATUS .

Is MySQL a server?

The MySQL server works in a client and server system. This system includes a multiple-threaded SQL server that supports varied backends, different client programs and libraries, administrative tools, and many application programming interfaces (API)s.

What MySQL means?

MySQL (/ˌmaɪˌɛsˌkjuːˈɛl/) is an open-source relational database management system (RDBMS). Its name is a combination of “My”, the name of co-founder Michael Widenius’s daughter, and “SQL”, the abbreviation for Structured Query Language.

How does MySQL work with database?

How Does MySQL Work? … MySQL creates a database for storing and manipulating data, defining the relationship of each table. Clients can make requests by typing specific SQL statements on MySQL. The server application will respond with the requested information and it will appear on the clients’ side.