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8c71c6aa8b
InnoDB I/O and buffer pool interfaces and the redo log format have been changed between MariaDB 10.1 and 10.2, and the backup code has to be adjusted accordingly. The code has been simplified, and many memory leaks have been fixed. Instead of the file name xtrabackup_logfile, the file name ib_logfile0 is being used for the copy of the redo log. Unnecessary InnoDB startup and shutdown and some unnecessary threads have been removed. Some help was provided by Vladislav Vaintroub. Parameters have been cleaned up and aligned with those of MariaDB 10.2. The --dbug option has been added, so that in debug builds, --dbug=d,ib_log can be specified to enable diagnostic messages for processing redo log entries. By default, innodb_doublewrite=OFF, so that --prepare works faster. If more crash-safety for --prepare is needed, double buffering can be enabled. The parameter innodb_log_checksums=OFF can be used to ignore redo log checksums in --backup. Some messages have been cleaned up. Unless --export is specified, Mariabackup will not deal with undo log. The InnoDB mini-transaction redo log is not only about user-level transactions; it is actually about mini-transactions. To avoid confusion, call it the redo log, not transaction log. We disable any undo log processing in --prepare. Because MariaDB 10.2 supports indexed virtual columns, the undo log processing would need to be able to evaluate virtual column expressions. To reduce the amount of code dependencies, we will not process any undo log in prepare. This means that the --export option must be disabled for now. This also means that the following options are redundant and have been removed: xtrabackup --apply-log-only innobackupex --redo-only In addition to disabling any undo log processing, we will disable any further changes to data pages during --prepare, including the change buffer merge. This means that restoring incremental backups should reliably work even when change buffering is being used on the server. Because of this, preparing a backup will not generate any further redo log, and the redo log file can be safely deleted. (If the --export option is enabled in the future, it must generate redo log when processing undo logs and buffered changes.) In --prepare, we cannot easily know if a partial backup was used, especially when restoring a series of incremental backups. So, we simply warn about any missing files, and ignore the redo log for them. FIXME: Enable the --export option. FIXME: Improve the handling of the MLOG_INDEX_LOAD record, and write a test that initiates a backup while an ALGORITHM=INPLACE operation is creating indexes or rebuilding a table. An error should be detected when preparing the backup. FIXME: In --incremental --prepare, xtrabackup_apply_delta() should ensure that if FSP_SIZE is modified, the file size will be adjusted accordingly.
196 lines
5.7 KiB
C
196 lines
5.7 KiB
C
/******************************************************
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Copyright (c) 2011-2015 Percona LLC and/or its affiliates.
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Declarations for xtrabackup.cc
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*******************************************************/
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#ifndef XB_XTRABACKUP_H
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#define XB_XTRABACKUP_H
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#include <my_getopt.h>
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#include "datasink.h"
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#include "xbstream.h"
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#include "changed_page_bitmap.h"
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struct xb_delta_info_t
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{
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xb_delta_info_t(page_size_t page_size, ulint space_id)
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: page_size(page_size), space_id(space_id) {}
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page_size_t page_size;
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ulint space_id;
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};
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/* value of the --incremental option */
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extern lsn_t incremental_lsn;
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extern char *xtrabackup_target_dir;
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extern char *xtrabackup_incremental_dir;
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extern char *xtrabackup_incremental_basedir;
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extern char *innobase_data_home_dir;
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extern char *innobase_buffer_pool_filename;
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extern ds_ctxt_t *ds_meta;
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extern ds_ctxt_t *ds_data;
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/* The last checkpoint LSN at the backup startup time */
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extern lsn_t checkpoint_lsn_start;
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extern xb_page_bitmap *changed_page_bitmap;
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extern char *xtrabackup_incremental;
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extern my_bool xtrabackup_incremental_force_scan;
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extern lsn_t metadata_from_lsn;
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extern lsn_t metadata_to_lsn;
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extern lsn_t metadata_last_lsn;
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extern xb_stream_fmt_t xtrabackup_stream_fmt;
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extern ibool xtrabackup_stream;
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extern char *xtrabackup_tables;
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extern char *xtrabackup_tables_file;
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extern char *xtrabackup_databases;
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extern char *xtrabackup_databases_file;
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extern char *xtrabackup_tables_exclude;
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extern char *xtrabackup_databases_exclude;
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extern ibool xtrabackup_compress;
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extern my_bool xtrabackup_backup;
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extern my_bool xtrabackup_prepare;
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extern my_bool xtrabackup_copy_back;
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extern my_bool xtrabackup_move_back;
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extern my_bool xtrabackup_decrypt_decompress;
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extern char *innobase_data_file_path;
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extern longlong innobase_page_size;
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extern int xtrabackup_parallel;
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extern my_bool xb_close_files;
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extern const char *xtrabackup_compress_alg;
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#ifdef __cplusplus
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extern "C"{
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#endif
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extern uint xtrabackup_compress_threads;
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extern ulonglong xtrabackup_compress_chunk_size;
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#ifdef __cplusplus
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}
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#endif
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extern my_bool xtrabackup_export;
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extern char *xtrabackup_extra_lsndir;
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extern ulint xtrabackup_log_copy_interval;
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extern char *xtrabackup_stream_str;
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extern long xtrabackup_throttle;
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extern longlong xtrabackup_use_memory;
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extern my_bool opt_galera_info;
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extern my_bool opt_slave_info;
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extern my_bool opt_no_lock;
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extern my_bool opt_safe_slave_backup;
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extern my_bool opt_rsync;
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extern my_bool opt_force_non_empty_dirs;
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extern my_bool opt_noversioncheck;
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extern my_bool opt_no_backup_locks;
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extern my_bool opt_decompress;
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extern my_bool opt_remove_original;
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extern char *opt_incremental_history_name;
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extern char *opt_incremental_history_uuid;
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extern char *opt_user;
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extern char *opt_password;
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extern char *opt_host;
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extern char *opt_defaults_group;
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extern char *opt_socket;
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extern uint opt_port;
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extern char *opt_login_path;
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extern char *opt_log_bin;
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extern const char *query_type_names[];
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enum query_type_t {QUERY_TYPE_ALL, QUERY_TYPE_UPDATE,
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QUERY_TYPE_SELECT};
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extern TYPELIB query_type_typelib;
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extern ulong opt_lock_wait_query_type;
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extern ulong opt_kill_long_query_type;
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extern uint opt_kill_long_queries_timeout;
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extern uint opt_lock_wait_timeout;
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extern uint opt_lock_wait_threshold;
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extern uint opt_debug_sleep_before_unlock;
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extern uint opt_safe_slave_backup_timeout;
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extern const char *opt_history;
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enum binlog_info_enum { BINLOG_INFO_OFF, BINLOG_INFO_LOCKLESS, BINLOG_INFO_ON,
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BINLOG_INFO_AUTO};
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extern ulong opt_binlog_info;
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void xtrabackup_io_throttling(void);
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my_bool xb_write_delta_metadata(const char *filename,
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const xb_delta_info_t *info);
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/** @return the tablespace flags from a given data file
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@retval ULINT_UNDEFINED if the file is not readable */
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ulint xb_get_space_flags(pfs_os_file_t file);
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/************************************************************************
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Checks if a table specified as a name in the form "database/name" (InnoDB 5.6)
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or "./database/name.ibd" (InnoDB 5.5-) should be skipped from backup based on
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the --tables or --tables-file options.
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@return TRUE if the table should be skipped. */
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my_bool
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check_if_skip_table(
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/******************/
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const char* name); /*!< in: path to the table */
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/************************************************************************
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Checks if a database specified by path should be skipped from backup based on
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the --databases, --databases_file or --databases_exclude options.
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@return TRUE if the table should be skipped. */
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my_bool
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check_if_skip_database_by_path(
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const char* path /*!< in: path to the db directory. */
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);
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/************************************************************************
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Check if parameter is set in defaults file or via command line argument
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@return true if parameter is set. */
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bool
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check_if_param_set(const char *param);
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#if defined(HAVE_OPENSSL)
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extern my_bool opt_ssl_verify_server_cert;
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#endif
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my_bool
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xb_get_one_option(int optid,
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const struct my_option *opt __attribute__((unused)),
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char *argument);
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const char*
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xb_get_copy_action(const char *dflt = "Copying");
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#endif /* XB_XTRABACKUP_H */
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