Skip to main content

MySQL Multi-Master Replication Manager


MMM (Multi-Master Replication Manager for MySQL) is a set of flexible scripts to perform monitoring/failover and management of MySQL master-master replication configurations (with only one node writable at any time).
The toolset also has the ability to read balance standard master/slave configurations with any number of slaves, so you can use it to move virtual IP addresses around a group of servers depending on whether they are behind in replication.
The current version of this software is stable, but the authors would appreciate any comments, suggestions, bug reports about this version to make it even better. Current version 2.0 development is led by Pascal Hofmann. If you require support, advice or assistance with deployment, please contact Percona or Open Query.

Latest bugs (2.x)

Latest code changes (2.x)

    Comments

    Post a Comment

    Popular posts from this blog

    About MySQL - Database history Support and Versioning

    About MySQL: MySQL was created by a Swedish company. David Axmark (left) and Michael "Monty" Widenius,  MySQL AB, founded by David Axmark, Allan Larsson and Michael "Monty" Widenius. Original development of MySQL by Widenius and Axmark began in 1994. The first version of MySQL appeared on 23 May 1995. It was initially created for personal usage from mSQL based on the low-level language ISAM, which the creators considered too slow and inflexible. They created a new SQL interface, while keeping the same API as mSQL. By keeping the API consistent with the mSQL system, many developers were able to use MySQL instead of the (proprietarily licensed) mSQL antecedent. Support: The MySQL server software itself and the client libraries use dual-licensing distribution. They are offered under GPL version 2, or a proprietary license. MySQL AB owns the copyright to the MySQL source code. This means that MySQL AB can distribute MySQL under several different l...
    Post a Comment
    Read more

    MySQL thread error code of 1032- Translate binlog completely to avoid error

    Could not execute Update_rows event on table db.table; Can't find record in 'table', Error_code: 1032; handler error HA_ERR_KEY_NOT_FOUND; the event's   master log mysql-bin.262297, end_log_pos 1983208 As of my knowledge the causing stop of slave SQL thread error code of 1032, due to lack of sync between Master - Slave. In our case, slave got an Update event form master, but that particular record was not available in the slave. (Of course, that was deleted on Master n Slave separately) You would get this error only if the binlog_format is set to ROW_BASED or MIXED mode. So, now check that particular binlog at that position where replication stopped with this error. When you convert the binlog with mysqlbinlog command, you may see some junk characters   where you were expecting some DMLs which caused the error(In our case its an Update statement). So you can use below command to translate binlog completely: mysqlbinlog --base64-output=DECO...
    Post a Comment
    Read more

    MySQL Architecture -Client Server Architecture

    Client/Server Overview The MySQL database system operates using a client/server architecture. The server is a central program that manages database contents, and client programs connect to the server to retrieve or modify the data. MySQL also includes non-client utility programs and scripts. MySQL Server:   This is the mysqld program that manages database and tables. Most users choose binary MySQL distribution that includes a server ready to run with the capabilities they need, but it's also possible to compile MySQL from source. Client Programs:  These are programs that communicate with the server by sending requests to it over a network connection. The server acts on each request and returns a response to the client. For example you can use the mysql client to send queries to the server, and the server returns the query results. A client program can connect locally to a server running on the same machine or remotely to a server running on a different mac...
    Post a Comment
    Read more