MariaDB

View Current Viewing Revision #10 from 06/01/2018 8:53 p.m.

MariaDB Server is a world-wide popular database server, which is created by the original developers of MySQL. It is highly compatible with applications developed for MySQL. New features from MySQL are likely to be also added into MariaDB. In most cases, users can directly switch from MySQL to MariaDB without extra work.

History

MariaDB was forked from MySQL after Sun's acquisition by Oracle. The project is lead by Michael Widenius, who was also a founder of MySQL AB which was later acquired by Sun. The DBMS was named after Michael Widenius' younger daughter Maria, just like MySQL, which was named after his first daughter "My".

Logging

Logical Logging Physical Logging

Physical logging is called binary logging in MariaDB, while logical logging is called general query logging.

Indexes

B+Tree Hash Table R-Tree

Different Storage engines support different indexes: Aria: B-tree, R-tree MyISAM B-tree, R-tree InnoDB: B-tree Memory/Heap: Hash, B-tree *NDB: B-tree, Hash

Concurrency Control

Two-Phase Locking (Deadlock Detection)

InnoDB uses 2PL deadlock detection.

Storage Model

Decomposition Storage Model (Columnar) N-ary Storage Model (Row/Record)

MariaDB supports different storage models with different storage engines.

MariaDB requires foreign keys to be checked that some integrity rules are enforced.

Isolation Levels

Read Uncommitted Read Committed Serializable Repeatable Read

Storage Architecture

Disk-oriented In-Memory

MariaDB supports different storage architectures with different storage engines.

Query Interface

Custom API SQL Stored Procedures

Views

Virtual Views Materialized Views

Checkpoints

Consistent Fuzzy

XtraDB, a fork of InnoDB, is the default storage engine of MariaDB 10.1, while InnoDB is the default storage engine of MariaDB 10.2. InnoDB supports: Sharp checkpointing: all dirty pages of committed transactions are being flushed, while dirty pages for uncommitted transactions are not being flushed. Fuzzy checkpointing: the dirty pages that will be flushed in sharp checkpointing will be gradually flushed.