Note that this post is now outdated. See Table and tablespace encryption on MariaDB 10.1

Introduction

For the moment, the only engines that fully support encryption are XtraDB and InnoDB. The Aria storage engine also supports encryption, but only for temporary tables.

MariaDB supports 2 different way to encrypt data in InnoDB/XtraDB:

Specified table encryption: Only tables which you create with PAGE_ENCRYPTION=1 are encrypted. This feature was created by eperi.
Tablespace encryption: Everything is encrypted (including log files). This feature was created by Google and is based on their MySQL branch.

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Continue reading “Table and tablespace encryption on MariaDB 10.1.3”

Introduction

When you e.g. delete rows, these rows are just marked as deleted not really physically deleted from indexes and free space introduced is not returned to operating system for later reuse. Purge thread will physically delete index keys and rows, but still free space introduced is not returned to operating system and this operation can lead holes on page. If you have variable length rows, this could lead to situation where this free space can’t be used for new rows (if these rows are larger than old ones). User may use OPTIMIZE TABLE or ALTER TABLE <table> …

Continue reading “MariaDB 10.1.1: Defragmenting unused space on InnoDB tablespace”

Introduction

Online DDL is a new feature in MariaDB 10.0. Online DDL is processed through below 4 tasks in sequence.

InnoDB::ha_prepare_inplace_alter_table(..)
InnoDB::ha_inplace_alter_table(..)
InnoDB::ha_commit_inplace_alter_table(..)
mysql_rename_table(..)

InnoDB storage engine allocates temporal memory buffer for transaction logging in phase 1 where row changes during this phase are logged. Size of this buffer is at start sort_buffer_size and it can be grown up to innodb_online_alter_log_max size. During phase 2 thread processing the ALTER statement will copy old table’s rows to a new altered table. After this MariaDB will take exclusive lock for target table and applies row log buffer to the new altered table. …

Continue reading “MariaDB 10.1.1: Monitoring progress and temporal memory usage of Online DDL in InnoDB”

The MariaDB project is pleased to announce the immediate availability of MariaDB 10.0.9. This is a Release Candidate release.

Among other changes, XtraDB is now the default InnoDB implementation, Oracle’s InnoDB is included as a plugin and can be dynamically loaded if desired. Packages for Ubuntu 14.04 “trusty” and Debian “Sid” have also been added to the MariaDB Ubuntu and Debian repositories.

See the Release Notes and Changelog for detailed information on this release and the What is MariaDB 10.0? page in the MariaDB Knowledge Base for general information about the MariaDB 10.0 series. …

Continue reading “MariaDB 10.0.9 now available”

The MariaDB project is pleased to announce the immediate availability of MariaDB 5.5.32. This is a Stable (GA) release. See the Release Notes and Changelog for detailed information on this release and the What is MariaDB 5.5? page in the AskMonty Knowledgebase for general information about the MariaDB 5.5 series.

Download MariaDB 5.5.32

Release Notes Changelog What is MariaDB 5.5?

This release is primarily a bug-fix release.