1.. _xtrabackup_files : 2 3============================================ 4Index of files created by Percona XtraBackup 5============================================ 6 7* Information related to the backup and the server 8 9 * :file:`backup-my.cnf` 10 This file contains information to start the mini instance of InnoDB 11 during the :option:`--prepare`. This is **NOT** a backup of 12 original :file:`my.cnf`. The InnoDB configuration is read from the file 13 :file:`backup-my.cnf` created by |xtrabackup| when the backup was 14 made. :option:`--prepare` uses InnoDB configuration from 15 ``backup-my.cnf`` by default, or from 16 :option:`--defaults-file`, if specified. InnoDB 17 configuration in this context means server variables that affect data 18 format, i.e. ``innodb_page_size`` option, 19 ``innodb_log_block_size``, etc. Location-related variables, like 20 ``innodb_log_group_home_dir`` or ``innodb_data_file_path`` 21 are always ignored by :option:`--prepare`, so preparing 22 a backup always works with data files from the backup directory, rather 23 than any external ones. 24 25 * :file:`xtrabackup_checkpoints` 26 The type of the backup (e.g. full or incremental), its state (e.g. 27 prepared) and the |LSN| range contained in it. This information is used 28 for incremental backups. 29 Example of the :file:`xtrabackup_checkpoints` after taking a full 30 backup: 31 32 .. code-block:: text 33 34 backup_type = full-backuped 35 from_lsn = 0 36 to_lsn = 15188961605 37 last_lsn = 15188961605 38 39 Example of the :file:`xtrabackup_checkpoints` after taking an incremental 40 backup: 41 42 .. code-block:: text 43 44 backup_type = incremental 45 from_lsn = 15188961605 46 to_lsn = 15189350111 47 last_lsn = 15189350111 48 49 * :file:`xtrabackup_binlog_info` 50 The binary log file used by the server and its position at the moment of 51 the backup. Result of the :command:`SHOW MASTER STATUS`. 52 53 * :file:`xtrabackup_binlog_pos_innodb` 54 The binary log file and its current position for |InnoDB| or |XtraDB| 55 tables. 56 57 * :file:`xtrabackup_binary` 58 The |xtrabackup| binary used in the process. 59 60 * :file:`xtrabackup_logfile` 61 Contains data needed for running the: :option:`--prepare`. 62 The bigger this file is the :option:`--prepare` process 63 will take longer to finish. 64 65 * :file:`<table_name>.delta.meta` 66 This file is going to be created when performing the incremental backup. 67 It contains the per-table delta metadata: page size, size of compressed 68 page (if the value is 0 it means the tablespace isn't compressed) and 69 space id. Example of this file could looks like this: 70 71 .. code-block:: text 72 73 page_size = 16384 74 zip_size = 0 75 space_id = 0 76 77* Information related to the replication environment (if using the 78 :option:`--slave-info` option): 79 80 * :file:`xtrabackup_slave_info` 81 The ``CHANGE MASTER`` statement needed for setting up a slave. 82 83* Information related to the *Galera* and *Percona XtraDB Cluster* (if using 84 the :option:`--galera-info` option): 85 86 * :file:`xtrabackup_galera_info` 87 Contains the values of ``wsrep_local_state_uuid`` and 88 ``wsrep_last_committed`` status variables 89