Percona XtraDB Cluster 5.6.15-25.5 发布了，该版本基于 Percona Server 5.6.15-63.0，改进记录包括：
wsrep patch did not allow server to start with Query Cache enabled. This restriction and check have been removed now and query cache can be fully enabled from config file.
New SST options have been implemented:
inno-move-optswhich pass options to backup, apply and move stages of innobackupex.
The joiner would wait and not fall back to choosing other potential donor nodes (not listed in wsrep_sst_donor) by their state. This happened even when comma was added at the end. This fixes it for that particular case. Bug fixed #1285380.
Initial configurable timeout, of 100 seconds, to receive a first packet via SST has been implemented, so that if donor dies somewhere in between, joiner doesn’t hang. Timeout can be configured with the sst-initial-timeout variable.
Replication of partition tables without binlogging enabled failed, partition truncation didn’t work because of lack of TO isolation there. Bug fixed #1219605.
Boostrapping a node in a
NON-PRIMARYstate would lead to crash. Bug fixed #1286450.
New versions of xtrabackup SST scripts were ignoring
--socketparameter passed by
mysqld. Bug fixed #1289483.