June 2002
Intermediate to advanced
816 pages
20h 46m
English
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InnoDB Tables
InnoDB Tables Overview
InnoDB provides MySQL with a transaction-safe (ACID-compliant) table handler with commit, rollback, and crash recovery capabilities. InnoDB does locking on row level and also provides an Oracle-style consistent non-locking read in SELECTs. These features increase multi-user concurrency and performance. There is no need for lock escalation in InnoDB because row level locks in InnoDB fit in very little space. InnoDB tables support FOREIGN KEY constraints as the first table type in MySQL.
InnoDB has been designed for maximum performance when processing large data volumes. Its CPU efficiency is probably not matched by any other disk-based relational database engine.
Technically, InnoDB is a complete database backend placed under MySQL. InnoDB has its own buffer pool for caching data and indexes in main memory. InnoDB stores its tables and indexes in a tablespace, which may consist of several files. This is different from, for example, MyISAM tables, where each table is stored as a separate file. InnoDB tables can be of any size also on those operating systems where file-size is limited to 2G.
You can find the latest information about InnoDB at http://www.innodb.com/. The most up-to-date version of the InnoDB manual is always placed there, and you can also order commercial licenses and support for InnoDB.
InnoDB is currently (October 2001) used in production at several large database sites requiring high performance. The famous Internet news site Slashdot.org ...
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