Percona XtraDB Cluster 5.5.3023.7.4 for MySQL

Percona XtraDB Cluster 5.5.30-23.7.4 for MySQL 发布了，包含如下新特：

• Percona XtraDB Cluster has implemented initial implementation of weighted quorum. Weight for node can be assigned via pc.weight option in the wsrep_provider_options variable. Accepted values are in the range [0, 255] (inclusive). Quorum is computed using weighted sum over group members.
• Percona XtraDB Cluster will now be shipped with the libjemalloc library. Benchmark showing the impact of memory allocators on MySQL performance can be found in this blogpost.
• This release of Percona XtraDB Cluster has fixed number of foreign key and packaging bugs.

此外还修复了大量的bug，详细列表请看这里。

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。