Index of files created by Percona XtraBackup

• Information related to the backup and the server

  • backup-my.cnf

  This file contains information to start the mini instance of InnoDB during the xtrabackup --prepare. This is NOT a backup of original my.cnf. The InnoDB configuration is read from the file backup-my.cnf created by innobackupex when the backup was made. xtrabackup --prepare uses InnoDB configuration from backup-my.cnf by default, or from xtrabackup --defaults-file, if specified. InnoDB configuration in this context means server variables that affect data format, i.e. innodb_page_size option, innodb_log_block_size, etc. Location-related variables, like innodb_log_group_home_dir or innodb_data_file_path are always ignored by xtrabackup --prepare, so preparing a backup always works with data files from the backup directory, rather than any external ones.

  • xtrabackup_checkpoints

  The type of the backup (e.g. full or incremental), its state (e.g. prepared) and the LSN range contained in it. This information is used for incremental backups. Example of the xtrabackup_checkpoints after taking a full backup:

  backup_type = full-backuped
  from_lsn = 0
  to_lsn = 15188961605
  last_lsn = 15188961605
  

  Example of the xtrabackup_checkpoints after taking an incremental backup:

  backup_type = incremental
  from_lsn = 15188961605
  to_lsn = 15189350111
  last_lsn = 15189350111
  

  • xtrabackup_binlog_info

  The binary log file used by the server and its position at the moment of the backup. Result of the SHOW MASTER STATUS.

  • xtrabackup_binlog_pos_innodb

  The binary log file and its current position for InnoDB or XtraDB tables.

  • xtrabackup_binary

  The xtrabackup binary used in the process.

  • xtrabackup_logfile

  Contains data needed for running the: xtrabackup --prepare. The bigger this file is the xtrabackup --prepare process will take longer to finish.

  • <table_name>.delta.meta

  This file is going to be created when performing the incremental backup. It contains the per-table delta metadata: page size, size of compressed page (if the value is 0 it means the tablespace isn’t compressed) and space id. Example of this file could looks like this:

  page_size = 16384
  zip_size = 0
  space_id = 0
  

• Information related to the replication environment (if using the xtrabackup --slave-info option):

  • xtrabackup_slave_info

  The CHANGE MASTER statement needed for setting up a slave.

• Information related to the Galera and Percona XtraDB Cluster (if using the xtrabackup --galera-info option):

  • xtrabackup_galera_info

  Contains the values of wsrep_local_state_uuid and wsrep_last_committed status variables

Contact us

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To report bugs or submit feature requests, open a JIRA ticket.

For paid support and managed or consulting services , contact Percona Sales.

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Last update: 2022-07-19