Percona XtraDB Cluster 5.6.32-25.17 发布
欢迎加入运维网交流群：263444886http://onexin.iyunv.com/source/plugin/onexin_bigdata/https://my.oschina.net/img/hot3.pngPercona XtraDB Cluster 5.6.32-25.17 发布了，二进制包已经提供下载，也已经提供在软件库。
Percona XtraDB Cluster 5.6.32-25.17基于以下项目：
[*] Percona Server 5.6.32-78.1
[*] Galera Replication library 3.17
[*] Codership wsrep API version 25
该版本的更新主要是bug修复。具体如下：
Bug修复：
[*] Fixed DONOR node getting stuck in Joined state after successful SST. Bugs fixed #1608680 and #1611728.
[*] Removed protection against repeated calls of wsrep->pause() on the same node to allow parallel RSU operation.
[*] Fixed error when running SHOW STATUS during group state update.
[*] Setting the wsrep_auto_increment_control to OFF didn’t restore the original user set value.
[*] Corrected the return code of sst_flush_tables() function to return a non-negative error code and thus pass assertion.
[*] Using Percona XtraBackup as the SST method now requires Percona XtraBackup 2.3.5 or later.
[*] Fixed memory leak and stale pointer due to stats not freeing when toggling the wsrep_provider variable.
[*] Fixed failure of ROLLBACK to register wsrep_handler.
[*] Improved rollback process to ensure that when a transaction is rolled back, any statements open by the transaction are also rolled back.
[*] Fixed failure of symmetric encryption during SST.
[*] Performing an SST would display the encryption key in the logs. It’s recommended to use encrypt-key-file instead of encrypt-key option.
[*] Node transitioning to non-primary state with active ALTER TABLE could result in a crash.
[*] Fixed setting of seqno in grastate.dat to -1 on clean shutdown.
[*] Fixed failure of asynchronous TOI actions (like DROP) for non-primary nodes.
[*] Removed the unused sst_special_dirs variable.
[*] Added support of defaults-group-suffix for SST scripts.
[*] Other low-level fixes and improvements for better stability
更多内容请查看发行说明
Percona XtraDB Cluster是针对MySQL用户的高可用性和扩展性解决方案，基于Percona Server 。其包括了Write Set REPlication补丁，使用Galera 2.0库，这是一个针对事务性应用程序的同步多主机复制插件。
Percona Server是MySQL的改进版本，使用 XtraDB 存储引擎，在功能和性能上较 MySQL 有着很显著的提升，如提升了在高负载情况下的 InnoDB 的性能，为 DBA 提供了一些非常有用的性能诊断工具，另外有更多的参数和命令来控制服务器行为。
Percona XtraDB Cluster提供了：
[*] 同步复制，事务可以在所有节点上提交。
[*] 多主机复制，你可以写到任何节点。
[*] 从（slave）服务器上的并行应用事件，真正的“并行复制”。
[*] 自动节点配置。
[*] 数据一致性，不再有未同步的从服务器。
Percona XtraDB Cluster完全兼容MySQL或Percona Server，包括：
[*] 数据兼容。Percona XtraDB Cluster可在由MySQL或Percona Server创建的数据库上使用。
[*] 应用程序兼容。如果要使用Percona XtraDB Cluster，你的应用程序基本不需要作任何更改。
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