![]() ![]() Overview of some storage engines provided with MySQL, withġ. The various storage engines provided with MySQL are designed withĭifferent use cases in mind. Table for exporting data to a spreadsheet and a few For example, an application might use mostly You can specify the storage engine for any You are not restricted to using the same storage engine for anĮntire server or schema. With this engine, but no data can be stored in them or retrieved Illustrates how to begin writing new storage engines. This engine serves as an example in the MySQL source code that Logical database from many physical servers. Offers the ability to link separate MySQL servers to create one Good for VLDB environments such as data warehousing. Identical MyISAM tables and reference them as Require the highest possible degree of uptime and availability.Įnables a MySQL DBA or developer to logically group a series of Replica servers, but the source server does not keep its ownĭatabase engine is particularly suited for applications that Replication configurations where DML statements are sent to The Blackhole storage engine accepts but does not store data, Retrieving large amounts of seldom-referenced historical, These compact, unindexed tables are intended for storing and Because CSV tables are not indexed, youĭuring normal operation, and only use CSV tables during the Its tables are really text files with comma-separated values.ĬSV tables let you import or dump data in CSV format, toĮxchange data with scripts and applications that read and write NDBCLUSTER provides fast key-value lookups Pool memory area provides a general-purpose and durable way to Its useĬases are decreasing InnoDB with its buffer This engine wasįormerly known as the HEAP engine. Require quick lookups of non-critical data. Stores all data in RAM, for fast access in environments that Used in read-only or read-mostly workloads in Web and data Limits the performance in read/write workloads, so it is often Nonlocking reads increase multi-user concurrency andĬlustered indexes to reduce I/O for common queries based on To coarser granularity locks) and Oracle-style consistent InnoDB row-level locking (without escalation Storage engine for MySQL that has commit, rollback, andĬrash-recovery capabilities to protect user data. InnoDB is a transaction-safe (ACID compliant) See Section A.2, “MySQL 8.0 FAQ: Storage Engines”. The storageĮngines available might depend on which edition of MySQL you areįor answers to commonly asked questions about MySQL storage engines, (see Section 16.11, “Overview of MySQL Storage Engine Architecture”).įor information about features offered in commercial MySQL ServerĮditions, on the MySQL website. For advanced users, it alsoĬontains a description of the pluggable storage engine architecture ![]() This chapter covers use cases for special-purpose MySQL storageĬhapter 15, The InnoDB Storage Engine andĬhapter 23, MySQL NDB Cluster 8.0. The Support column indicates whether an engineĪn engine is available, not available, or available and currently To determine which storage engines your server supports, use the MySQL Server uses a pluggable storage engine architecture thatĮnables storage engines to be loaded into and unloaded from a Recommends using it for tables except for specialized use cases. The default and most general-purpose storage engine, and Oracle Storage engines are MySQL components that handle the SQL operations Table of Contents 16.1 Setting the Storage Engine 16.2 The MyISAM Storage Engine 16.2.1 MyISAM Startup Options 16.2.2 Space Needed for Keys 16.2.3 MyISAM Table Storage Formats 16.2.4 MyISAM Table Problems 16.3 The MEMORY Storage Engine 16.4 The CSV Storage Engine 16.4.1 Repairing and Checking CSV Tables 16.4.2 CSV Limitations 16.5 The ARCHIVE Storage Engine 16.6 The BLACKHOLE Storage Engine 16.7 The MERGE Storage Engine 16.7.1 MERGE Table Advantages and Disadvantages 16.7.2 MERGE Table Problems 16.8 The FEDERATED Storage Engine 16.8.1 FEDERATED Storage Engine Overview 16.8.2 How to Create FEDERATED Tables 16.8.3 FEDERATED Storage Engine Notes and Tips 16.8.4 FEDERATED Storage Engine Resources 16.9 The EXAMPLE Storage Engine 16.10 Other Storage Engines 16.11 Overview of MySQL Storage Engine Architecture 16.11.1 Pluggable Storage Engine Architecture 16.11.2 The Common Database Server Layer ![]()
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