46c3e7e353
Problem: ======= There are two issues that are addressed in this patch: 1) SHOW BINARY LOGS uses caching to store the binary logs that exist in the log directory; however, if new events are written to the logs, the caching strategy is unaware. This is okay for users, as it is okay for SHOW to return slightly old data. The test, however, can result in inconsistent data. It runs two connections concurrently, where one shows the logs, and the other adds a new file. The output of SHOW BINARY LOGS then depends on when the cache is built, with respect to the time that the second connection rotates the logs. 2) There is a race condition between RESET MASTER and SHOW BINARY LOGS. More specifically, where they both need the binary log lock to begin, SHOW BINARY LOGS only needs the lock to build its cache. If RESET MASTER is issued after SHOW BINARY LOGS has built its cache and before it has returned the results, the presented data may be incorrect. Solution: ======== 1) As it is okay for users to see stale data, to make the test consistent, use DEBUG_SYNC to force the race condition (problem 2) to make SHOW BINARY LOGS build a cache before RESET MASTER is called. Then, use additional logic from the next part of the solution to rebuild the cache. 2) Use an Atomic_counter to keep track of the number of times RESET MASTER has been called. If the value of the counter changes after building the cache, the cache should be rebuilt and the analysis should be restarted. Reviewed By: ============ Andrei Elkin: <andrei.elkin@mariadb.com> |
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| client | ||
| cmake | ||
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| include | ||
| libmariadb@0cc16f18c1 | ||
| libmysqld | ||
| libservices | ||
| man | ||
| mysql-test | ||
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| mysys_ssl | ||
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| scripts | ||
| sql | ||
| sql-bench | ||
| sql-common | ||
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| strings | ||
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| wsrep-lib@c45b1eff94 | ||
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| CONTRIBUTING.md | ||
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| KNOWN_BUGS.txt | ||
| README.md | ||
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Code status:
ci.appveyor.com
MariaDB: drop-in replacement for MySQL
MariaDB is 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/library/new-and-old-releases/
As MariaDB is a full replacement of MySQL, the MySQL manual at http://dev.mysql.com/doc is generally applicable.
Help
More help is available from the Maria Discuss mailing list https://launchpad.net/~maria-discuss and the #maria IRC channel on Freenode.
Live QA for beginner contributors
MariaDB has a dedicated time each week when we answer new contributor questions live on Zulip and IRC. From 8:00 to 10:00 UTC on Mondays, and 10:00 to 12:00 UTC on Thursdays, anyone can ask any questions they’d like, and a live developer will be available to assist.
New contributors can ask questions any time, but we will provide immediate feedback during that interval.
Licensing
NOTE:
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/
Bugs in the MySQL code can also be submitted at: https://bugs.mysql.com
The code for MariaDB, including all revision history, can be found at: https://github.com/MariaDB/server