What Is MariaDB?
MariaDB is a backward compatible, drop-in replacement of the MySQL® Database Server. It includes all major open source storage engines.
What Is the Goal of MariaDB?
To provide a community developed, stable, and always Free DBMS that is, on the user level, broadly compatible with MySQL.
We strive for interoperability with both our own, and our upstream, communities.
Until MariaDB 5.5, MariaDB was kept up to date with the latest MySQL release from the same branch. For example MariaDB 5.1.47 was up to date with MySQL 5.1.47, and so on.
We did a merge from the main MySQL branch for every new MySQL release or when there was some critical bugfix applied to the main branch.
Since MariaDB 10.0, MariaDB includes backported features from MySQL as well as entirely new features not found anywhere else, but does not necessarily include all MySQL features.
We strive to keep our main trees as free from bugs as possible. It should be reasonably safe to pull from our trees at any time.
Who Is Behind Mariadb?
The MariaDB project is the brainchild of Michael “Monty” Widenius, the founder of MySQL®, Monty Program Ab (nowMariaDB Corporation), and a founding member of the MariaDB Foundation.
The core team consists of developers sponsored by the MariaDB Foundation, companies and individuals who are members of the Foundation, and people in the MariaDB community. MariaDB is a technocracy, and we want our core membership to reflect this.
The MariaDB Foundation’s role is to be a steward of the MariaDB project. The Foundation also takes the responsibility of keeping the quality of the MariaDB project high. The MariaDB Foundation has assumed this stewardship from Monty Program Ab, which was the original driver until a foundation could be created.
A current list of active core contributors (MariaDB captains) can be found on Launchpad. Anyone with enough technical skill level who actively participates in the development of MariaDB can be part of this team. You don’t have to work at the MariaDB Foundation, MariaDB Corporation, or at any other Foundation member company to be able to participate or commit code!
How Can I Contribute to MariaDB?
If you want to contribute to, or participate in the development of MariaDB, there are many ways to do so. You don’t have to be a developer (but we always welcome more of those), you just have to have the willingness to help make MariaDB better. For example, we are looking for writers or translators of KB articles and people helping setting up MariaDB discussions groups.
What Is MariaDB Galera Cluster?
MariaDB Galera Cluster is a synchronous multi-master cluster for MariaDB. It is available on Linux only, and only supports theXtraDB/InnoDB storage engines (although there is experimental support for MyISAM – see the wsrep_replicate_myisam system variable).
Starting with MariaDB 10.1, the wsrep API for Galera Cluster is included by default. This is available as a separate download for MariaDB 10.0 and MariaDB 5.5.
Which Is the Max Storage Capacity of Version 5.5 MariaDB?
InnoDB/XtraDB tables can be up to 64TB (terabytes) in size. On top of this you can have multiple tables per database and multiple databases per server. Usually the size and space limits of your underlying storage and operating system are reached long before MariaDB’s internal limits are reached.
Why Does MariaDB 10.2 Use Innodb Instead Of Xtradb?
Keeping InnoDB (or XtraDB) up to date with MySQL (Percona) is a complex task. It took us more than half a year to migrate from InnoDB-5.6 to InnoDB-5.7 in 10.2. Doing it again for XtraDB would probably have required only slightly less than this. For us to embark on such project, it must bring significant benefits to our users.
XtraDB had many great improvements over InnoDB in 5.1 and 5.5. But over time, MySQL has implemented almost all of them. InnoDB has caught up and XtraDB is only marginally better. Not enough to justify a multi-month merge that would delay 10.2-GA for everyone.
In particular, the only real improvement that XtraDB 5.7 seems to have is for a write-intensive I/O-bound workload, where innodb_thread_concurrency control is disabled.
With a proper innodb_thread_concurrency, XtraDB is only marginally better. We didn’t want to delay 10.2-GA by up to half a year for the sake of those few users who have write-intensive I/O-bound InnoDB workload and don’t know how to configure innodb_thread_concurrency.
How to Change Innodb_page_size?
No need for a fresh install.
Just export your data, move or delete the system database (ibdata1) and the log files (ib_logfile0 & ib_logfile1), set innodb_page_size to either 4k or 8k, and restart MariaDB. A new XtraDB instance will be created with the smaller page size. Then you can import your data and run your tests.
Default Data Directory for MariaDB?
The data directory location is controlled by the datadir variable. Look at your /etc/mysql/my.cnf file to see where your installation of MariaDB is configured to store data. The default is /var/lib/mysql but it is often changed, like for example if you are using a RAID array.
What Version of MariaDB Is Workable on Windows 7 X64?
Any released version.