MyISAM, merge, innodb, memory, federated, cluster storage and other storage engines
MySQL is a popular relational database management system (RDBMS) that supports multiple storage engines, each with its own unique features and capabilities. Here’s a brief overview of some of the most commonly used storage engines in MySQL:
- MyISAM: This is the default storage engine for MySQL versions prior to 5.5. It is known for its fast read and write operations, but lacks support for transactions and foreign keys. MyISAM tables are best suited for read-heavy workloads, such as web applications that rely heavily on caching.
- InnoDB: This is the default storage engine for MySQL versions 5.5 and later. It is known for its support of transactions, foreign keys, and row-level locking, making it suitable for write-heavy workloads. InnoDB also includes built-in crash recovery and support for full-text search.
- Memory: This storage engine stores all data in memory, making it ideal for caching and temporary data storage. However, since all data is stored in memory, it is not suitable for persistent data storage.
- Federated: This storage engine allows you to access data from a remote MySQL server as if it were local. This can be useful for distributed applications or for consolidating data from multiple servers.
- Merge: This storage engine allows you to combine multiple MyISAM tables with identical structure into a single virtual table. This can be useful for improving query performance by reducing the number of tables that need to be scanned.
- Cluster: This storage engine allows you to create a cluster of MySQL servers that can share data and provide high availability and scalability. It is well-suited for applications that require high availability and scalability, such as web applications or e-commerce sites.
Other storage engines that are available in MySQL include CSV, Blackhole, Archive, and NDB Cluster. Each storage engine has its own unique features and tradeoffs, so it’s important to choose the right one for your specific needs.
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