No innodb_log_block_size support in xtrabackup_56
The 5.6-based binary (i.e. xtrabackup_56 which is used to backup both MySQL 5.6 and Percona Server 5.6 servers) does not support PS-specific innodb_
InnoDB: Allocated tablespace 2, old maximum was 0
InnoDB: No valid checkpoint found.
InnoDB: If this error appears when you are creating an InnoDB database,
InnoDB: the problem may be that during an earlier attempt you managed
InnoDB: to create the InnoDB data files, but log file creation failed.
InnoDB: If that is the case, please refer to