一、DDL操做与Xtrabackup备份冲突app
当MySQL使用xrabckup进行备份时，若是执行DDL进行表修改，会致使xrabckup备份失败。性能
错误相似于：日志
InnoDB: Last flushed lsn: 3375345258517 load_index lsn 3379255303757 InnoDB: An optimized (without redo logging) DDLoperation has been performed. All modified pages may not have been flushed to the disk yet. PXB will not be able take a consistent backup. Retry the backup operation
二、磁盘性能太差致使xtrabckup备份失败code
Innodb产生日志的速度远超于Xtrabackup复制的速度，部分Innodb日志被截断，致使备份失败。orm
错误相似于：blog
xtrabackup: error: log block numbers mismatch: xtrabackup: error: expected log block no. 201901064, but got no. 208192508 from the log file. xtrabackup: error: it looks like InnoDB log has wrapped around before xtrabackup could process all records due to either log copying being too slow, or log files being too small. xtrabackup: Error: xtrabackup_copy_logfile() failed.