MySQL Utilities 1.4.2 (including MySQL Fabric) RC has been released
Posted by: Karen Langford
Date: March 31, 2014 06:59AM
Date: March 31, 2014 06:59AM
Dear MySQL users, MySQL Utilities version 1.4.2 is compatible with MySQL Server versions 5.1 and greater, but should work with earlier versions (greater than v4.1). Python v2.6 and v2.7 are supported. In addition to server utilities, MySQL Utilities also contains MySQL Fabric: a framework for managing a collection of MySQL servers. MySQL Fabric is deployed as a separate service daemon that contains support for high-availability and sharding. The management framework maintains a database of the routing and state information for the servers making up the system and provides an easy-to-use command line interface for adding, removing and organizing servers. High-availability is provided by continuously monitoring the servers and executing slave promotion when the master crashes and just as importantly automatically updates the state and routing information that gets messages to the right server. MySQL Fabric comes with built-in support for sharding either using ranges or consistent hashing and supports the sharding of multiple tables to ensure that rows with matching sharding keys are stored in the same shard. MySQL Fabric also contains support for global tables that are duplicated on all shards as well as the ability to synchronize schema updates across all of the servers. To provide high performance and avoid latency, transactions are directly routed by Fabric-aware connectors rather than routing via an external proxy. The connectors dispatch transactions to the correct shard, perform load-balancing, and handle read-write splitting. Currently there exists Fabric-aware versions of Connector/Python, Connector/Java, and Connector/PHP (through a Fabric-aware mysqlnd_ms plugin). MySQL Utilities v1.4.2 is available for download from http://dev.mysql.com/downloads/tools/utilities/ A brief summary of changes is listed below. Please check the CHANGES.txt file inside the distribution for a more complete list of changes. Functionality Added or Changed (2014-03-31) ------------------------------------------- * The mysqlrplsync utility was added, which checks data consistency between servers in a replicated setup. * The mysqlrplms utility was added, which provides round-robin multi-source replication (a slave server continually cycles through multiple masters in order to store a consolidated data set). Bugs Fixed ---------- * With fabric, the scheduler did not check and determine which procedures needed to be notified after releasing the procedure that was blocking them. (Bug #18454582, Bug #72117) * With fabric, failover was not handled properly when both the global and shard groups had a failed master. (Bug #18403885, Bug #72016) * The mysqlrplsync utility would crash when the --exclude option was used, and at least one database was available to be checked. This issue was due to an incomplete check when determining which tables to exclude from the slaves. (Bug #18388846) * The MySQL Utilities testing suite (mut) now tests if ports are available before assigning them to a test. (Bug #18339351) * MySQL Server UUIDs are now handled in a case-insensitive way, more precisely when checking if GTIDs belong to the master. This helps accommodate MySQL Server 5.6.9, which could change the case for the server_uuid variable. (Bug #18275566) * With Fabric, attempting to destroy a group when the group was used in the shard sub-system would output an unfriendly and unclear error. Fabric now checks if the group is used in the shard sub-system before trying to destroy (remove) it, and a clearer error is emitted if it is in use. (Bug #18280004, Bug #71766) * The mut rpl_admin_gtid test result varied from host to host, due to using the RESET MASTER statement without first stopping all the slaves. This resulted in undefined behavior, which led to inconsistent rest results. (Bug #18203946) * A typo was fixed in the mysqldbcopy utility's help text. (Bug #18206923, Bug #71627) * With Fabric, group definitions now use a single (global) username and password, instead of requiring a username/password for each MySQL server when they were added to the group. (Bug #18153823, Bug #71512) * When checking for proper permissions, Fabric would execute several SELECT statements against the 'mysql' database, which caused the login mechanism to fail if the user lacked access. This mechanism now uses 'SHOW GRANTS' statements instead, and now prints out a detailed error message when access is unavailable. (Bug #18138545, Bug #71448) * The server.set_status() function's status parameter now accepts an integer, to better coincide with the integer value provided by dump_servers(). The strings "PRIMARY", "SECONDARY", "SPARE" and "FAULTY" also remain as acceptable values. (Bug #18124108, Bug #71428) * The mysqlrpladmin utility did not correctly account for consecutive transactions reported in a single string. The utility would only consider the transaction or transaction range that appeared after the last ':'. (Bug #18083550) * The Installer (setup.py) was not able to install the fabric configuration file (fabric.cfg) to the user's home directory even though the --user or --home options were used. It would instead attempt to install it in /etc/mysql/. (Bug #18109179, Bug #71442) * On Linux, the mysqlserverclone utility failed to spawn a MySQL server if the path passed to the --new-data option was too long, as determined by the MySQL server. A check was added that limits the datadir length to 200 characters, which helps coincide with the maximum socket length (107) set by the MySQL server. This check can be bypassed with the --force option. (Bug #18117930) * The text for the store.dump_* commands was updated to better reflect how these commands are for retrieving information, instead of writing it. (Bug #18087356, Bug #71370) * When cloning a database with foreign key dependencies on the same MySQL server, and while using the multiprocessing option (with a value greater than one), the mysqldbcopy utility issued an error about foreign key constraint failures. The foreign key checks are now disabled before cloning the tables. (Bug #18041743) * The internal gtid_enabled() function would only check a single MySQL server, and returned TRUE if the checked MySQL server had GTID enabled. It now only returns TRUE if all MySQL servers in the topology have GTIDs enabled. (Bug #17890455) * The privilege check for the mysqlfailover utility was performed after the instance registration process, which would lead to query errors (instead of privilege errors) if some privileges, such as DROP or CREATE, were not available. Additionally, a check for the INSERT privilege was added to all slaves, as it might be required for them to become the new master, in order to successfully perform the failover instance registration on the new master. (Bug #17878705) * The default TCP port set for MySQL Fabric was changed from 8080 to 32274. (Bug #17820905, Bug #70954) * The is_connected() fabric function was executed every time a statement was executed, which reduced overall performance. (Bug #17702237) * Exported or copied/cloned databases from the mysqldbcopy and mysqldbexport utilities would fail to function with the mysqldbimport utility if dependencies between views were present. These dependencies are now sorted in the appropriate order before copy, clone, or export. (Bug #17694651) * Some MUT tests were failing with Connector/Python 1.1.x due to format changes in the returned error messages by the Connector. (Bug #17655980) * The commercial version of the MySQL Utilities contained a hard-coded path to the Python directory, so the MySQL Utilities installation would fail. The Fabric and Doctrine projects were also updated. (Bug #17647498) * The mysqldiff and mysqldbcompare utilities print all of the control lines for each difference, even for unnecessary lines which is especially true of the grid format and unified types. A new --compact option was added, which reduces output from the diff. (Bug #14725008) * When executing the mysqldiskusage utility on a remote MySQL server, the utility would report information about the local datadir if the remote and local datadir paths were identical. (Bug #13572814) * The --force option was renamed to --drop-first for the mysqldbcopy utility. (Bug #13563798) * When using the mysqldbimport utility without the --drop-first option, importing a valid SQL import file that included a CREATE DATABASE statement for a database that already existed did not yield a related error message. The associated error message was updated, and it also refers to the optional --drop-first option. (Bug #13563798) * A new --use-indexes option was added to the mysqldbcompare utility. Before, this utility did not compare tables that lacked a primary key. The new --use-indexes option allows non-unique indexes to be used, although only indexes with columns not allowing null values are permitted. Use --use-indexes to specify the unique index to be used for the Table comparative. If the specified index allows null values, then a warning is generated, and the next unique index will be used if one exists as otherwise the utility will stop with an error. (Bug #13492195) Documentation ------------- Online:http://dev.mysql.com/doc/workbench/en/mysql-utilities.html The source distribution includes the manual pages for each utility under the docs/ folder. Reporting Bugs -------------- We welcome and appreciate your feedback and bug reports: http://bugs.mysql.com/ Enjoy! On Behalf of the MySQL/ORACLE RE Team, Thanks, Kent & Hery
MySQL Utilities 1.4.2 (including MySQL Fabric) RC has been released
March 31, 2014 06:59AM
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