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This release is the first GA (Generally Available) stable release in the 2.1 series.
Percona XtraBackup now has support for Compact Backups. This feature can be used for taking the backups that will take less amount of disk space. GA release now contains new innobackupex --rebuild-threads that can be used to specify the number of threads started by XtraBackup when rebuilding secondary indexes on innobackupex --apply-log --rebuild-indexes. This allows parallel processing of individual tables when rebuilding the index.
Percona XtraBackup has implemented Encrypted Backups. This feature can be used to encrypt/decrypt both local and streamed backups in order to add another layer of protection to the backups.
innobackupex now uses Perl’s DBD::MySQL package for server communication instead of spawning the mysql command line client.
After being deprecated in previous version, option --remote-host has been completely removed in Percona XtraBackup 2.1.
innobackupex is using SHOW MASTER STATUS to obtain binlog file and position. This could trigger a bug if the server being backed up was standalone server (neither master nor slave in replication) and binlog information wasn’t available. Fixed by not creating xtrabackup_binlog_info file when binlog isn’t available. Bug fixed #1168513.
Percona XtraBackup would leave xbtemp temp files behind due to a typo. Bug fixed #1172016.
Percona XtraBackup would assume the table has been dropped if the tablespace was renamed after it was scanned by Percona XtraBackup on startup and before Percona XtraBackup attempted to copy it. Bug fixed #1079700.
Orphaned xtrabackup_pid file left inside tmpdir could cause SST to fail. Fixed by fix checking if xtrabackup_pid file exists once innobackupex starts, and try to remove it or fail if it cannot be removed. Bug fixed #1175860.