852d42e993
In mariadb-backup --backup there are multiple mechanisms for ensuring that a sufficient amount of the InnoDB write-ahead log (ib_logfile0) is being copied at the end of the backup. The backup needs to include the latest committed transaction. While further transaction commits are blocked by BACKUP STAGE BLOCK_COMMIT, ongoing transactions may modify the database contents and write log records. We were unnecessarily copying such log, which would also cause further effort of rolling back incomplete transactions after the backup is restored. backup_wait_for_lsn(): Declare as static, and refactor some code to separate functions backup_wait_for_lsn_low() and backup_wait_timeout(). backup_wait_for_commit_lsn(): A new function to determine the current LSN (within BACKUP STAGE BLOCK_COMMIT) and to wait for the log to be copied until that. Invoked by BackupStages::stage_block_commit(). xtrabackup_backup_func(): Remove a condition that had already been checked by a caller of backup_wait_timeout(). server_lsn_after_lock: Declare as a local variable in BackupStages::stage_block_ddl(). log_copying_thread(), io_watching_thread(): Use metadata_last_lsn instead of metadata_to_lsn as the stop condition. BackupStages::stage_block_commit(): Ensure that the log tables (in particular, mysql.general_log) will have been copied before the BACKUP STAGE BLOCK_COMMIT is being followed by any further SQL statements. Reviewed by: Debarun Banerjee Tested by: Matthias Leich |
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| libmariadb@486ce75d64 | ||
| libmysqld | ||
| libservices | ||
| man | ||
| mysql-test | ||
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Code status:
ci.appveyor.com
MariaDB: The innovative open source database
MariaDB was designed as a drop-in replacement of MySQL(R) with more features, new storage engines, fewer bugs, and better performance.
MariaDB is brought to you by the MariaDB Foundation and the MariaDB Corporation. Please read the CREDITS file for details about the MariaDB Foundation, and who is developing MariaDB.
MariaDB is developed by many of the original developers of MySQL who now work for the MariaDB Corporation, the MariaDB Foundation and by many people in the community.
MySQL, which is the base of MariaDB, is a product and trademark of Oracle Corporation, Inc. For a list of developers and other contributors, see the Credits appendix. You can also run 'SHOW authors' to get a list of active contributors.
A description of the MariaDB project and a manual can be found at:
https://mariadb.com/kb/en/mariadb-vs-mysql-features/
https://mariadb.com/kb/en/mariadb-versus-mysql-compatibility/
https://mariadb.com/kb/en/new-and-old-releases/
Getting the code, building it and testing it
Refer to the following guide: https://mariadb.org/get-involved/getting-started-for-developers/get-code-build-test/ which outlines how to build the source code correctly and run the MariaDB testing framework, as well as which branch to target for your contributions.
Help
More help is available from the Maria Discuss mailing list https://lists.mariadb.org/postorius/lists/discuss.lists.mariadb.org/ and MariaDB's Zulip instance, https://mariadb.zulipchat.com/
Licensing
MariaDB is specifically available only under version 2 of the GNU General Public License (GPLv2). (I.e. Without the "any later version" clause.) This is inherited from MySQL. Please see the README file in the MySQL distribution for more information.
License information can be found in the COPYING file. Third party license information can be found in the THIRDPARTY file.
Bug Reports
Bug and/or error reports regarding MariaDB should be submitted at: https://jira.mariadb.org
For reporting security vulnerabilities see: https://mariadb.org/about/security-policy/
The code for MariaDB, including all revision history, can be found at: https://github.com/MariaDB/server