percona-xtrabackup-8.0.32-26源码编译安装
2023-09-27 14:21:15 时间
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安装依赖包
yum install cmake openssl-devel libaio libaio-devel automake autoconf \
bison libtool ncurses-devel libgcrypt-devel libev-devel libcurl-devel zlib-devel \
zstd vim-common procps-ng-devel python3-sphinx
生成Makefile：
cmake -DWITH_BOOST=./ -DDOWNLOAD_BOOST=ON -DBUILD_CONFIG=xtrabackup_release -DWITH_MAN_PAGES=OFF
编译：make
安装：make install
01. 基础知识
如果备份的是从库，且备份的时候，主从延迟特别大，那么备份的时间点就会不准确，因此真正的备份的时间点一般是延迟的。
（1）innobackupex：是将xtrabackup进行封装的perl脚本，提供了备份myisam表的能力，因此一般都用该脚本进行热备数据。
（2）xtrabackup：只能备份innoDB和xtraDB两种数据引擎的表，而不能备份MyISAM数据表，因此一般不用，作为innobackupex的一部分。
（3）innobackupex工具使用：
--defaults-file=/home/work/mysql_3307/etc/my.cnf
--host=10.10.10.10
--port=3307
--user=mysqlbackup
--password=123456
--slave-info
--defaults-file=/home/work/mysql_3307/etc/my.cnf
/home/data/hostname_22_3307/2020-04-15_00-06-30
innobackupex --defaults-file=/home/work/mysql_3307/etc/my.cnf --user=mysqlbackup --password=... --host=127.0.0.1 --slave-info --ibbackup=xtrabackup --stream=xbstream --tmpdir=/home/work/tmp_xbm_33
（4） innobackupex --apply-log /home/data/hostname_22_3307/2020-04-15_00-06-30
一般情况下,在备份完成后，数据尚且不能用于恢复操作，因为备份的数据中可能会包含尚未提交的事务或已经提交但尚未同步至数据文件中的事务。
因此，此时数据文件仍处理不一致状态。此选项作用是通过回滚未提交的事务及同步已经提交的事务至数据文件使数据文件处于一致性状态。
在apply log完成之后，我们发现xtrabackup_checkpoints 中的backup_type从 full-backuped变成了 full-prepared
02. 备份原理
03. 文件介绍
（1）sys，mysql，performance_schema，用户数据库等：数据库的拷贝
ib_buffer_pool
ibdata1：备份共享表空间
undo001，undo002，undo002：备份undo log
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xtrabackup_logfile：备份redo log
这个文件相当的重要，这个文件记录的是从备份开始到备份结束所有的redo日志；
xtrabackup在apply log的时候需要读取该文件，进行redo前滚。
################################
xtrabackup_binlog_info：
文件记录的是备份完成的那个时间点的binlog位点。如果备份的是主库数据，则change位置点为xtrabackup_binlog_info
若未开启gtid，则内容如下：
mysql-bin.000332 28370863
若开启gtid，则内容如下：
mysql-bin.000009 788080016 b172206b-7035-11ea-8f2b-e4434bcaccee:1-333346
############################
xtrabackup_binlog_pos_innodb：
只是记录innodb和xtradb的binlog位点，myisam产生的binlog不会计算在内；
因此xtrabackup_binlog_pos_innodb的信息和第一次全备的xtrabackup_binlog_info文件中的信息是一致的。
若有非innodb存储引擎的事务，则binlog位点可能与xtrabackup_binlog_info不同，一般两者相同：
mysql-bin.000332 28370863
##########################
xtrabackup_slave_info：
要生成该文件，需要在备份时添加参数--slave-info。一般情况下都是备份的从库数据，xtrabackup_slave_info记录了主库复制的位置点。
若未开启gtid，则记录完成备份时，主库的点位，内容如下：
CHANGE MASTER TO MASTER_LOG_FILE='mysql-bin.002406', MASTER_LOG_POS=515291508
若开启了gtid，则记录完成备份时，主库的gtid_purged，内容如下：
SET GLOBAL gtid_purged='b172206b-7035-11ea-8f2b-e4434bcaccee:1-333346';
CHANGE MASTER TO MASTER_AUTO_POSITION=1
##########################
xtrabackup_info：
backup_type = log-applied
from_lsn = 0
to_lsn = 3021212303418
last_lsn = 3022371220298
compact = 0
recover_binlog_info = 0
[root@c3-dba-storage34 2020-04-15_00-06-30]# cat xtrabackup_info
uuid = e33f1cf9-7e85-11ea-ba16-90e2bad1cd48
name =
tool_name = innobackupex
tool_command = --defaults-file=/home/work/mysql/etc/my.cnf --user=mysqlbackup --password=... --host=127.0.0.1 --slave-info --ibbackup=xtrabackup --stream=xbstream --tmpdir=/home/work/tmp_xbm_3306/2020-04-15_00-06-36 .
tool_version = 2.4.7
ibbackup_version = 2.4.7
server_version = 5.7.25-28-log
start_time = 2020-04-15 00:06:36
end_time = 2020-04-15 03:26:49
lock_time = 0
binlog_pos = filename 'mysql-bin.000332', position '28370863'
innodb_from_lsn = 0
innodb_to_lsn = 3021212303418
partial = N
incremental = N
format = xbstream
compact = N
compressed = N
encrypted = N
xtrabackup_checkpoints：
提供的信息有：
备份状态：
如果是全量备份，backup_type = full-backuped
如果是增量备份，backup_type = incremental。备份集的状态在apply log后会改变，后面会说明
备份起始lsn：
内容如下：
backup_type = log-applied
from_lsn = 0
to_lsn = 3021212303418
last_lsn = 3022371220298
compact = 0
recover_binlog_info = 0
解释如下：
# from_lsn = 0由于是全量备份，所以数据是从LSN=0开始的；
backup-my.cnf：
# This MySQL options file was generated by innobackupex.
# The MySQL server
[mysqld]
innodb_checksum_algorithm=crc32
innodb_log_checksum_algorithm=strict_crc32
innodb_data_file_path=ibdata1:100M:autoextend
innodb_log_files_in_group=3
innodb_log_file_size=4294967296
innodb_fast_checksum=false
innodb_page_size=16384
innodb_log_block_size=512
innodb_undo_directory=./
innodb_undo_tablespaces=0
server_id=177093683
redo_log_version=1
1、备份到本地目录：/home/work/tmp/backup/
xtrabackup --backup --target-dir=/home/work/tmp/backup/ --user=mysqlbackup --password=123456 --host=127.0.0.1 --port=3306 --slave-info
2、应用本地目录/home/work/tmp/backup/中的备份日志，确保数据一致，提交完成的事务，回滚未完成的事务。
xtrabackup --prepare --target-dir=/home/work/tmp/backup/
增量备份与恢复：
使用XtraBackup进行增量备份可以大大减少备份时间和存储空间。以下是一些标准化的备份方案，可用于使用XtraBackup进行增量备份：
-
第一次全量备份：在开始增量备份之前，需要进行第一次全量备份。这可以使用上述全量备份步骤完成。将目标目录中的备份文件和元数据文件保存在安全的地方，以便将来进行恢复。
-
第一个增量备份：在完成全量备份之后，您可以使用以下命令创建第一个增量备份：
$ xtrabackup --backup --target-dir=/path/to/incremental/dir --incremental-basedir=/path/to/full/backup/dir/
-
在这里，--incremental-basedir选项指定前一个完整备份的目录，即全量备份的目标目录。
-
后续增量备份：对于后续的增量备份，您需要使用前一个增量备份的目录作为增量备份的基础目录，而不是全量备份的目标目录。例如，如果第一个增量备份存储在“/path/to/incremental/dir1”中，则第二个增量备份可以使用以下命令创建：
$ xtrabackup --backup --target-dir=/path/to/incremental/dir2 --incremental-basedir=/path/to/incremental/dir1
您可以根据需要创建任意数量的增量备份，每个增量备份都基于前一个增量备份或全量备份。
恢复备份：在恢复备份时，您需要先使用最新的完整备份，然后按顺序应用每个增量备份，直到恢复到最新的状态。例如，如果有一个全量备份和两个增量备份，则应按以下顺序进行恢复：
$ xtrabackup --prepare --apply-log-only --target-dir=/path/to/full/backup/dir
$ xtrabackup --prepare --apply-log-only --target-dir=/path/to/incremental/dir1 --incremental-basedir=/path/to/full/backup/dir
$ xtrabackup --prepare --apply-log-only --target-dir=/path/to/incremental/dir2 --incremental-basedir=/path/to/incremental/dir1
$ xtrabackup --prepare --target-dir=/path/to/full/backup/dir
下载源码包：
git clone https://github.com/percona/percona-server.git cd percona-server git checkout 8.0 git submodule init git submodule update
安装依赖：
yum install cmake openssl-devel libaio libaio-devel automake autoconf \ bison libtool ncurses-devel libgcrypt-devel libev-devel libcurl-devel zlib-devel \ zstd vim-common procps-ng-devel python3-sphinx
配置：cmake3 -DBUILD_CONFIG=xtrabackup_release -DWITH_MAN_PAGES=OFF -DWITH_BOOST=./ -DDOWNLOAD_BOOST=ON -DFORCE_INSOURCE_BUILD=1
编译：make
安装：make DESTDIR=/usr/local/xtrabackup-8.0 install
[root@a8-cloud-dba-db08 percona-xtrabackup]# mkdir /usr/local/xtrabackup-8.0 [root@a8-cloud-dba-db08 percona-xtrabackup]# make DESTDIR=/usr/local/xtrabackup-8.0 install [ 0%] Built target abi_check [ 0%] Built target lz4_lib [ 0%] Built target zlib_objlib [ 0%] Built target zlib [ 2%] Built target zstd_objlib [ 2%] Built target zstd [ 2%] Built target libedit_common [ 2%] Built target libedit_vi [ 2%] Built target libedit_emacs [ 2%] Built target libedit_func [ 2%] Built target libedit_fcns [ 2%] Built target libedit_help [ 3%] Built target edit [ 4%] Built target event_core [ 4%] Built target event_extra [ 4%] Built target event_openssl [ 4%] Built target event_pthreads [ 12%] Built target icuuc [ 22%] Built target icui18n [ 22%] Built target icustubdata [ 23%] Built target libprotobuf-lite [ 27%] Built target libprotobuf [ 31%] Built target libprotoc [ 31%] Built target protoc [ 32%] Built target kmip [ 32%] Built target demo_register [ 32%] Built target demo_create [ 32%] Built 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mysqlclient [ 43%] Built target run_libmysql_api_test [ 44%] Built target binlogevents_static [ 45%] Built target binlogstandalone_static [ 45%] Built target changestreams_standalone_static [ 45%] Built target archive [ 45%] Built target blackhole [ 45%] Built target csv [ 45%] Built target federated [ 46%] Built target heap_library [ 46%] Built target heap [ 48%] Built target myisam_library [ 48%] Built target myisam [ 49%] Built target myisammrg [ 56%] Built target perfschema [ 56%] Built target temptable [ 56%] Built target gen_lex_hash [ 56%] Built target GenServerSource [ 57%] Built target gen_keyword_list [ 57%] Built target GenKeywordList [ 57%] Built target gen_lex_token [ 57%] Built target GenDigestServerSource [ 59%] Built target mysql_server_component_services [ 59%] Built target rpl_protobuf_lite [ 59%] Built target comp_sql [ 59%] Built target GenFixPrivs [ 59%] Built target GenBootstrapPriv [ 59%] Built target all_sys_schema [ 59%] Built target sql_commands [ 59%] Built target GenSysSchema [ 59%] Built target master [ 59%] Built target rpl [ 73%] Built target sql_main [ 75%] Built target sql_gis [ 77%] Built target slave [ 83%] Built target sql_dd [ 85%] Built target binlog [ 93%] Built target innobase [ 93%] Built target innodb_zipdecompress [ 93%] Built target link_test_dir [ 93%] Built target GenVersionCheck [ 94%] Built target crc [ 94%] Built target library_mysys [ 94%] Built target keyring_common_objlib [ 94%] Built target keyring_common [ 95%] Built target minchassis [ 95%] Built target mysqlservices [ 97%] Built target xtrabackup [ 98%] Built target xbstream [ 98%] Built target xbcrypt [ 98%] Built target jsmn [ 98%] Built target xbcloud [ 99%] Built target keyring_file [ 99%] Built target keyring_vault [ 99%] Built target myisam_ftdump [ 99%] Built target myisamchk [ 99%] Built target myisamlog [ 99%] Built target myisampack [ 99%] Built target component_keyring_file [100%] Built target component_keyring_kmip [100%] Built target component_keyring_kms [100%] Built target ibd2sdi [100%] Built target innochecksum [100%] Built target perror [100%] Built target comp_client_err [100%] Built target GenClientError [100%] Built target my_print_defaults [100%] Built target lz4_decompress [100%] Built target range_check_err [100%] Built target zlib_decompress [100%] Generating Sys Schema C code [100%] Built target GenSysSchemaC Install the project... -- Install configuration: "RelWithDebInfo" -- Installing: /usr/local/xtrabackup-8.0/usr/local/docs -- Installing: /usr/local/xtrabackup-8.0/usr/local/lib/private/icudt69l -- Installing: /usr/local/xtrabackup-8.0/usr/local/lib/private/icudt69l/brkitr -- Installing: /usr/local/xtrabackup-8.0/usr/local/lib/private/icudt69l/brkitr/burmesedict.dict -- Installing: /usr/local/xtrabackup-8.0/usr/local/lib/private/icudt69l/brkitr/char.brk -- Installing: /usr/local/xtrabackup-8.0/usr/local/lib/private/icudt69l/brkitr/cjdict.dict -- Installing: 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/usr/local/xtrabackup-8.0/usr/local/xtrabackup-test/test/t/ib_part_databases.sh -- Installing: /usr/local/xtrabackup-8.0/usr/local/xtrabackup-test/test/t/ib_part_include.sh -- Installing: /usr/local/xtrabackup-8.0/usr/local/xtrabackup-test/test/t/ib_part_include_stream.sh -- Installing: /usr/local/xtrabackup-8.0/usr/local/xtrabackup-test/test/t/ib_part_tf_innodb.sh -- Installing: /usr/local/xtrabackup-8.0/usr/local/xtrabackup-test/test/t/ib_part_tf_innodb_stream.sh -- Installing: /usr/local/xtrabackup-8.0/usr/local/xtrabackup-test/test/t/ib_part_tf_myisam.sh -- Installing: /usr/local/xtrabackup-8.0/usr/local/xtrabackup-test/test/t/ib_rsync.sh -- Installing: /usr/local/xtrabackup-8.0/usr/local/xtrabackup-test/test/t/ib_rsync_nolock.sh -- Installing: /usr/local/xtrabackup-8.0/usr/local/xtrabackup-test/test/t/ib_specialchar.sh -- Installing: /usr/local/xtrabackup-8.0/usr/local/xtrabackup-test/test/t/innodb_data_home_dir.sh -- Installing: /usr/local/xtrabackup-8.0/usr/local/xtrabackup-test/test/t/innodb_fast_checksum.sh -- Installing: /usr/local/xtrabackup-8.0/usr/local/xtrabackup-test/test/t/innodb_log_checksum_algorithm.sh -- Installing: /usr/local/xtrabackup-8.0/usr/local/xtrabackup-test/test/t/innodb_log_checksums.sh -- Installing: /usr/local/xtrabackup-8.0/usr/local/xtrabackup-test/test/t/innodb_page_size.sh -- Installing: /usr/local/xtrabackup-8.0/usr/local/xtrabackup-test/test/t/instant_columns.sh -- Installing: /usr/local/xtrabackup-8.0/usr/local/xtrabackup-test/test/t/kill_long_selects.sh -- Installing: /usr/local/xtrabackup-8.0/usr/local/xtrabackup-test/test/t/mdl_locks.sh -- Installing: /usr/local/xtrabackup-8.0/usr/local/xtrabackup-test/test/t/parallel_copyback.sh -- Installing: /usr/local/xtrabackup-8.0/usr/local/xtrabackup-test/test/t/pxb-1493.sh -- Installing: /usr/local/xtrabackup-8.0/usr/local/xtrabackup-test/test/t/pxb-1536.sh -- Installing: 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Installing: /usr/local/xtrabackup-8.0/usr/local/man/man1/mysqldumpslow.1 -- Installing: /usr/local/xtrabackup-8.0/usr/local/man/man1/mysqlimport.1 -- Installing: /usr/local/xtrabackup-8.0/usr/local/man/man1/mysqlman.1 -- Installing: /usr/local/xtrabackup-8.0/usr/local/man/man1/mysqlpump.1 -- Installing: /usr/local/xtrabackup-8.0/usr/local/man/man1/mysqlrouter.1 -- Installing: /usr/local/xtrabackup-8.0/usr/local/man/man1/mysqlrouter_keyring.1 -- Installing: /usr/local/xtrabackup-8.0/usr/local/man/man1/mysqlrouter_passwd.1 -- Installing: /usr/local/xtrabackup-8.0/usr/local/man/man1/mysqlrouter_plugin_info.1 -- Installing: /usr/local/xtrabackup-8.0/usr/local/man/man1/mysqlshow.1 -- Installing: /usr/local/xtrabackup-8.0/usr/local/man/man1/mysqlslap.1 -- Installing: /usr/local/xtrabackup-8.0/usr/local/man/man1/perror.1 -- Installing: /usr/local/xtrabackup-8.0/usr/local/man/man1/zlib_decompress.1 -- Installing: /usr/local/xtrabackup-8.0/usr/local/man/man8/mysqld.8 [root@a8-cloud-dba-db08 percona-xtrabackup]#
[root@a8-cloud-dba-db08 bin]# ./xtrabackup --help xtrabackup: [Warning] option 'server-id': unsigned value 4545454545 adjusted to 4294967295. 2023-04-22T22:11:16.690245+08:00 0 [Note] [MY-011825] [Xtrabackup] recognized server arguments: --datadir=/var/lib/mysql --datadir=/home/work/mysql_3306/data --tmpdir=/home/work/mysql_3306/tmp
--log_bin=/home/work/mysql_3306//log/mysql-bin --open_files_limit=65536 --server-id=4545454545 --innodb_autoextend_increment=64 --innodb_write_io_threads=8 --innodb_read_io_threads=16 --innodb_buffer_pool_size=8G
--innodb_flush_log_at_trx_commit=0 --innodb_log_buffer_size=64M --innodb_log_file_size=4096M --innodb_log_files_in_group=3 --innodb_max_dirty_pages_pct=75 --innodb_flush_method=O_DIRECT --innodb_file_per_table=1 --innodb_io_capacity=5000 --innodb_open_files=65535 --innodb_log_checksums=on 2023-04-22T22:11:16.690852+08:00 0 [Note] [MY-011825] [Xtrabackup] recognized client arguments: --port=3306 --socket=/home/work/mysql_3306/mysql.sock ./xtrabackup version 8.0.32-26 based on MySQL server 8.0.32 Linux (x86_64) (revision id: 3e2f992ef97) Open source backup tool for InnoDB and XtraDB Copyright (C) 2009-2019 Percona LLC and/or its affiliates. Portions Copyright (C) 2000, 2011, MySQL AB & Innobase Oy. All Rights Reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation version 2 of the License. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You can download full text of the license on http://www.gnu.org/licenses/gpl-2.0.txt Usage: [./xtrabackup [--defaults-file=#] --backup | ./xtrabackup [--defaults-file=#] --prepare] [OPTIONS] Default options are read from the following files in the given order: /etc/my.cnf /etc/mysql/my.cnf /usr/local/etc/my.cnf ~/.my.cnf The following groups are read: xtrabackup mysqld The following options may be given as the first argument: --print-defaults Print the program argument list and exit. --no-defaults Don't read default options from any option file, except for login file. --defaults-file=# Only read default options from the given file #. --defaults-extra-file=# Read this file after the global files are read. --defaults-group-suffix=# Also read groups with concat(group, suffix) --login-path=# Read this path from the login file. -v, --version print xtrabackup version information --target-dir=name destination directory --backup take backup to target-dir --stats calc statistic of datadir (offline mysqld is recommended) --prepare prepare a backup for starting mysql server on the backup. --export create files to import to another database when prepare. --apply-log-only stop recovery process not to progress LSN after applying log when prepare. --print-param print parameter of mysqld needed for copyback. --use-memory=# The value is used instead of buffer_pool_size --use-free-memory-pct=# This option specifies the percentage of free memory to be used by buffer pool at --prepare stage (default is 0% - disabled). --estimate-memory This option enable/disable the estimation of memory required to prepare the backup. The estimation happens during backup. (Default OFF) --throttle=# limit count of IO operations (pairs of read&write) per second to IOS values (for '--backup') --log[=name] Ignored option for MySQL option compatibility --log-copy-interval=# time interval between checks done by log copying thread in milliseconds (default is 1 second). --extra-lsndir=name (for --backup): save an extra copy of the xtrabackup_checkpoints file in this directory. --incremental-lsn=name (for --backup): copy only .ibd pages newer than specified LSN 'high:low'. ##ATTENTION##: If a wrong LSN value is specified, it is impossible to diagnose this, causing the backup to be unusable. Be careful! --incremental-basedir=name (for --backup): copy only .ibd pages newer than backup at specified directory. --incremental-dir=name (for --prepare): apply .delta files and logfile in the specified directory. --to-archived-lsn=# Don't apply archived logs with bigger log sequence number. --tables=name filtering by regexp for table names. --tables-file=name filtering by list of the exact database.table name in the file. --databases=name filtering by list of databases. --databases-file=name filtering by list of databases in the file. --tables-exclude=name filtering by regexp for table names. Operates the same way as --tables, but matched names are excluded from backup. Note that this option has a higher priority than --tables. --databases-exclude=name Excluding databases based on name, Operates the same way as --databases, but matched names are excluded from backup. Note that this option has a higher priority than --databases. --create-ib-logfile ** not work for now** creates ib_logfile* also after '--prepare'. ### If you want create ib_logfile*, only re-execute this command in same options. ### --stream=name Stream all backup files to the standard output in the specified format. Currently supported formats are 'tar' and 'xbstream'. --compress[=name] Compress individual backup files using the specified compression algorithm. Supported algorithms are 'quicklz', 'lz4' and 'zstd'. The default algorithm is 'quicklz'. Please note: quicklz is deprecated. Consider using ZSTD or LZ4. --compress-threads=# Number of threads for parallel data compression. The default value is 1. --compress-chunk-size=# Size of working buffer(s) for compression threads in bytes. The default value is 64K. --compress-zstd-level=# Zstandard compression level. from 1 - 19. The default value is 1. --encrypt=name Encrypt individual backup files using the specified encryption algorithm. --encrypt-key=name Encryption key to use. --encrypt-key-file=name File which contains encryption key to use. --encrypt-threads=# Number of threads for parallel data encryption. The default value is 1. --encrypt-chunk-size=# Size of working buffer(S) for encryption threads in bytes. The default value is 64K. --rebuild-threads=# Use this number of threads to rebuild indexes in a compact backup. Only has effect with --prepare and --rebuild-indexes. --incremental-force-scan Perform a full-scan incremental backup even if page tracking is enabled on server --close-files do not keep files opened. Use at your own risk. --core-file Write core on fatal signals --copy-back Copy all the files in a previously made backup from the backup directory to their original locations. --move-back Move all the files in a previously made backup from the backup directory to the actual datadir location. Use with caution, as it removes backup files. --galera-info This options creates the xtrabackup_galera_info file which contains the local node state at the time of the backup. Option should be used when performing the backup of Percona-XtraDB-Cluster. Has no effect when backup locks are used to create the backup. --slave-info This option is useful when backing up a replication slave server. It prints the binary log position and name of the master server. It also writes this information to the "xtrabackup_slave_info" file as a "CHANGE MASTER" command. A new slave for this master can be set up by starting a slave server on this backup and issuing a "CHANGE MASTER" command with the binary log position saved in the "xtrabackup_slave_info" file. --page-tracking use the page-tracking server feature for incremental backup instead of the full scan of data files. With --page-tracking, xtrabackup will start page tracking on the server during backup by invoking mysqlbackup component service API. When --page-tracking is used during subsequent incremental backup, it will use the page-tracking file generated by the server to copy delta pages modified since the last backup. --no-lock Use this option to disable lock-ddl and table lock with "FLUSH TABLES WITH READ LOCK". Use it only if ALL your tables are InnoDB and you DO NOT CARE about the binary log position of the backup. This option shouldn't be used if there are any DDL statements being executed or if any updates are happening on non-InnoDB tables (this includes the system MyISAM tables in the mysql database), otherwise it could lead to an inconsistent backup. If you are considering to use --no-lock because your backups are failing to acquire the lock, this could be because of incoming replication events preventing the lock from succeeding. Please try using --safe-slave-backup to momentarily stop the replication slave thread, this may help the backup to succeed and you then don't need to resort to using this option. --lock-ddl Issue LOCK TABLES/LOCK INSTANCE FOR BACKUP if it is supported by server at the beginning of the backup to block all DDL operations. (Defaults to on; use --skip-lock-ddl to disable.) --lock-ddl-timeout=# If LOCK TABLES FOR BACKUP does not return within given timeout, abort the backup. --lock-ddl-per-table Lock DDL for each table before xtrabackup starts the copy phase and until the backup is completed. --backup-lock-timeout=# Timeout in seconds for attempts to acquire metadata locks. --backup-lock-retry-count=# Number of attempts to acquire metadata locks. --dump-innodb-buffer-pool Instruct MySQL server to dump innodb buffer pool by issuing a SET GLOBAL innodb_buffer_pool_dump_now=ON --dump-innodb-buffer-pool-timeout=# This option specifies the number of seconds xtrabackup waits for innodb buffer pool dump to complete --dump-innodb-buffer-pool-pct=# This option specifies the percentage of buffer pool to be dumped --safe-slave-backup This option stops slave SQL thread at the start of the backup and waits to start backup until Slave_open_temp_tables in "SHOW STATUS" is zero. If there are no open temporary tables, the backup will take place, otherwise the SQL thread will be started and stopped until there are no open temporary tables. The backup will fail if Slave_open_temp_tables does not become zero after --safe-slave-backup-timeout seconds. The slave SQL thread will be restarted when the backup finishes. --rsync Uses the rsync utility to optimize local file transfers. When this option is specified, innobackupex uses rsync to copy all non-InnoDB files instead of spawning a separate cp for each file, which can be much faster for servers with a large number of databases or tables. This option cannot be used together with --stream. --force-non-empty-directories This option, when specified, makes --copy-back or --move-back transfer files to non-empty directories. Note that no existing files will be overwritten. If --copy-back or --nove-back has to copy a file from the backup directory which already exists in the destination directory, it will still fail with an error. --no-server-version-check This option allows backup to proceed when the server version is greater (newer) than the PXB supported version --no-version-check This option disables the version check which is enabled by the --version-check option. --tables-compatibility-check This option enables engine compatibility warning. (Defaults to on; use --skip-tables-compatibility-check to disable.) --no-backup-locks This option controls if backup locks should be used instead of FLUSH TABLES WITH READ LOCK on the backup stage. It will disable lock-ddl. The option has no effect when backup locks are not supported by the server. This option is disabled by default, disable with --no-backup-locks. --rollback-prepared-trx Force rollback prepared InnoDB transactions. --decompress Decompresses all files with the .qp extension in a backup previously made with the --compress option. -u, --user=name This option specifies the MySQL username used when connecting to the server, if that's not the current user. The option accepts a string argument. See mysql --help for details. -H, --host=name This option specifies the host to use when connecting to the database server with TCP/IP. The option accepts a string argument. See mysql --help for details. -P, --port=# This option specifies the port to use when connecting to the database server with TCP/IP. The option accepts a string argument. See mysql --help for details. -p, --password[=name] This option specifies the password to use when connecting to the database. It accepts a string argument. See mysql --help for details. -S, --socket=name This option specifies the socket to use when connecting to the local database server with a UNIX domain socket. The option accepts a string argument. See mysql --help for details. --incremental-history-name=name This option specifies the name of the backup series stored in the PERCONA_SCHEMA.xtrabackup_history history record to base an incremental backup on. Xtrabackup will search the history table looking for the most recent (highest innodb_to_lsn), successful backup in the series and take the to_lsn value to use as the starting lsn for the incremental backup. This will be mutually exclusive with --incremental-history-uuid, --incremental-basedir and --incremental-lsn. If no valid lsn can be found (no series by that name, no successful backups by that name) xtrabackup will return with an error. It is used with the --incremental option. --incremental-history-uuid=name This option specifies the UUID of the specific history record stored in the PERCONA_SCHEMA.xtrabackup_history to base an incremental backup on. --incremental-history-name, --incremental-basedir and --incremental-lsn. If no valid lsn can be found (no success record with that uuid) xtrabackup will return with an error. It is used with the --incremental option. --decrypt=name Decrypts all files with the .xbcrypt extension in a backup previously made with --encrypt option. --remove-original Remove .qp and .xbcrypt files after decryption and decompression. --ftwrl-wait-query-type=name This option specifies which types of queries are allowed to complete before innobackupex will issue the global lock. Default is all. --kill-long-query-type=name This option specifies which types of queries should be killed to unblock the global lock. Default is "SELECT". --history[=name] This option enables the tracking of backup history in the PERCONA_SCHEMA.xtrabackup_history table. An optional history series name may be specified that will be placed with the history record for the current backup being taken. --kill-long-queries-timeout=# This option specifies the number of seconds innobackupex waits between starting FLUSH TABLES WITH READ LOCK and killing those queries that block it. Default is 0 seconds, which means innobackupex will not attempt to kill any queries. --ftwrl-wait-timeout=# This option specifies time in seconds that innobackupex should wait for queries that would block FTWRL before running it. If there are still such queries when the timeout expires, innobackupex terminates with an error. Default is 0, in which case innobackupex does not wait for queries to complete and starts FTWRL immediately. --ftwrl-wait-threshold=# This option specifies the query run time threshold which is used by innobackupex to detect long-running queries with a non-zero value of --ftwrl-wait-timeout. FTWRL is not started until such long-running queries exist. This option has no effect if --ftwrl-wait-timeout is 0. Default value is 60 seconds. --debug-sleep-before-unlock=# This is a debug-only option used by the XtraBackup test suite. --safe-slave-backup-timeout=# How many seconds --safe-slave-backup should wait for Slave_open_temp_tables to become zero. (default 300) --check-privileges Check database user privileges before performing any query. --read-buffer-size[=#] Set datafile read buffer size, given value is scaled up to page size. Default is 10Mb. --server-public-key-path=name File path to the server public RSA key in PEM format. --get-server-public-key Get server public key --ssl-mode=name SSL connection mode. --ssl-ca=name CA file in PEM format. --ssl-capath=name CA directory. --ssl-cert=name X509 cert in PEM format. --ssl-cipher=name SSL cipher to use. --ssl-key=name X509 key in PEM format. --ssl-crl=name Certificate revocation list. --ssl-crlpath=name Certificate revocation list path. --tls-version=name TLS version to use, permitted values are: TLSv1.2 --ssl-fips-mode=name SSL FIPS mode (applies only for OpenSSL); permitted values are: OFF, ON, STRICT --tls-ciphersuites=name TLS v1.3 cipher to use. --ssl-session-data=name Session data file to use to enable ssl session reuse --ssl-session-data-continue-on-failed-reuse If set to ON, this option will allow connection to succeed even if session data cannot be reused. --server-public-key-path=name File path to the server public RSA key in PEM format. --transition-key[=name] Transition key to encrypt tablespace keys with. --xtrabackup-plugin-dir=name Directory for xtrabackup plugins. --plugin-load=name List of plugins to load. --generate-new-master-key Generate new master key when doing copy-back. --generate-transition-key Generate transition key and store it into keyring. --keyring-file-data[=name] Path to keyring file. --component-keyring-config[=name] Path to load component config. Used for --prepare, --move-back, --copy-back and --stats. --component-keyring-file-config[=name] Path to load keyring component config. Used for --prepare, --move-back, --copy-back and --stats. (Deprecated, please use --component-keyring-config instead) --parallel=# Number of threads to use for parallel datafiles transfer. The default value is 1. --strict Fail with error when invalid arguments were passed to the xtrabackup. (Defaults to on; use --skip-strict to disable.) --rocksdb-checkpoint-max-age=# Maximum ROCKSB checkpoint age in seconds. --rocksdb-checkpoint-max-count=# Maximum count of ROCKSB checkpoints. -h, --datadir=name Path to the database root. -t, --tmpdir=name Path for temporary files. Several paths may be specified, separated by a colon (:), in this case they are used in a round-robin fashion. --log[=name] Ignored option for MySQL option compatibility --log-bin[=name] Base name for the log sequence --log-bin-index=name File that holds the names for binary log files. --innodb[=name] Ignored option for MySQL option compatibility --innodb-adaptive-hash-index Enable InnoDB adaptive hash index (enabled by default). Disable with --skip-innodb-adaptive-hash-index. (Defaults to on; use --skip-innodb-adaptive-hash-index to disable.) --innodb-autoextend-increment=# Data file autoextend increment in megabytes --innodb-buffer-pool-size=# The size of the memory buffer InnoDB uses to cache data and indexes of its tables. --innodb-checksums Enable InnoDB checksums validation (enabled by default). Disable with --skip-innodb-checksums. (Defaults to on; use --skip-innodb-checksums to disable.) --innodb-data-file-path=name Path to individual files and their sizes. --innodb-data-home-dir=name The common part for InnoDB table spaces. --innodb-io-capacity[=#] Number of IOPs the server can do. Tunes the background IO rate --innodb-file-io-threads=# Number of file I/O threads in InnoDB. --innodb-read-io-threads=# Number of background read I/O threads in InnoDB. --innodb-write-io-threads=# Number of background write I/O threads in InnoDB. --innodb-file-per-table Stores each InnoDB table to an .ibd file in the database dir. --innodb-flush-log-at-trx-commit[=#] Set to 0 (write and flush once per second), 1 (write and flush at each commit) or 2 (write at commit, flush once per second). --innodb-flush-method=name With which method to flush data. --innodb-force-recovery=# Helps to save your data in case the disk image of the database becomes corrupt. --innodb-log-buffer-size=# The size of the buffer which InnoDB uses to write log to the log files on disk. --innodb-log-file-size=# Size of each log file in a log group. --innodb-log-files-in-group=# Number of log files in the log group. InnoDB writes to the files in a circular fashion. Value 3 is recommended here. --innodb-log-group-home-dir=name Path to InnoDB log files. --innodb-max-dirty-pages-pct=# Percentage of dirty pages allowed in bufferpool. --innodb-open-files=# How many files at the maximum InnoDB keeps open at the same time. --innodb-use-native-aio Use native AIO if supported on this platform. --innodb-page-size=# The universal page size of the database. --innodb-log-block-size=# The log block size of the transaction log file. Changing for created log file is not supported. Use on your own risk! --innodb-buffer-pool-filename=name Filename to/from which to dump/load the InnoDB buffer pool --debug-sync=name Debug sync point. This is only used by the xtrabackup test suite --innodb-checksum-algorithm=name The algorithm InnoDB uses for page checksumming. [CRC32, STRICT_CRC32, INNODB, STRICT_INNODB, NONE, STRICT_NONE] --innodb-log-checksums Whether to compute and require checksums for InnoDB redo log blocks (Defaults to on; use --skip-innodb-log-checksums to disable.) --innodb-undo-directory=name Directory where undo tablespace files live, this path can be absolute. --innodb-directories=name List of directories 'dir1;dir2;..;dirN' to scan for tablespace files. Default is to scan 'innodb-data-home-dir;innodb-undo-directory;datadir' --temp-tablespaces-dir=name Directory where temp tablespace files live, this path can be absolute. --innodb-undo-tablespaces=# Number of undo tablespaces to use. --innodb-redo-log-encrypt Enable or disable Encryption of REDO tablespace. --innodb-undo-log-encrypt Enable or disable Encrypt of UNDO tablespace. --defaults-group=name defaults group in config file (default "mysqld"). --open-files-limit=# the maximum number of file descriptors to reserve with setrlimit(). --server-id=# The server instance being backed up --rocksdb-datadir=name RocksDB data directory --rocksdb-wal-dir=name RocksDB WAL directory --register-redo-log-consumer Register a redo log consumer in the start of the backup. If this option is enabled, it will block the server from purging redo log if PXB redo follow thread is still copying it and will stall DMLs on the server. Variables (--variable-name=value) and boolean options {FALSE|TRUE} Value (after reading options) --------------------------------- ---------------------------------------- datadir /home/work/mysql_3306/data tmpdir /home/work/mysql_3306/tmp log (No default value) log-bin /home/work/mysql_3306//log/mysql-bin log-bin-index (No default value) innodb (No default value) innodb-adaptive-hash-index TRUE innodb-autoextend-increment 64 innodb-buffer-pool-size 8589934592 innodb-checksums TRUE innodb-data-file-path (No default value) innodb-data-home-dir (No default value) innodb-io-capacity 5000 innodb-file-io-threads 4 innodb-read-io-threads 16 innodb-write-io-threads 8 innodb-file-per-table TRUE innodb-flush-log-at-trx-commit 0 innodb-flush-method O_DIRECT innodb-force-recovery 0 innodb-log-buffer-size 67108864 innodb-log-file-size 4294967296 innodb-log-files-in-group 3 innodb-log-group-home-dir (No default value) innodb-max-dirty-pages-pct 75 innodb-open-files 65535 innodb-use-native-aio FALSE innodb-page-size 16384 innodb-log-block-size 512 innodb-buffer-pool-filename (No default value) debug-sync (No default value) innodb-checksum-algorithm crc32 innodb-log-checksums TRUE innodb-undo-directory (No default value) innodb-directories (No default value) temp-tablespaces-dir (No default value) innodb-undo-tablespaces 2 innodb-redo-log-encrypt FALSE innodb-undo-log-encrypt FALSE defaults-group mysqld open-files-limit 65536 server-id 4294967295 rocksdb-datadir (No default value) rocksdb-wal-dir (No default value) register-redo-log-consumer FALSE Variables (--variable-name=value) and boolean options {FALSE|TRUE} Value (after reading options) ----------------------------------------- -------------------------------- version FALSE target-dir /usr/local/xtrabackup-8.0/usr/local/bin/xtrabackup_backupfiles/ backup FALSE stats FALSE prepare FALSE export FALSE apply-log-only FALSE print-param FALSE use-memory 104857600 use-free-memory-pct 0 estimate-memory FALSE throttle 0 log (No default value) log-copy-interval 1000 extra-lsndir (No default value) incremental-lsn (No default value) incremental-basedir (No default value) incremental-dir (No default value) to-archived-lsn 0 tables (No default value) tables-file (No default value) databases (No default value) databases-file (No default value) tables-exclude (No default value) databases-exclude (No default value) create-ib-logfile FALSE stream (No default value) compress (No default value) compress-threads 1 compress-chunk-size 65536 compress-zstd-level 1 encrypt NONE encrypt-key-file (No default value) encrypt-threads 1 encrypt-chunk-size 65536 rebuild-threads 1 incremental-force-scan FALSE close-files FALSE copy-back FALSE move-back FALSE galera-info FALSE slave-info FALSE page-tracking FALSE no-lock FALSE lock-ddl TRUE lock-ddl-timeout 31536000 lock-ddl-per-table FALSE backup-lock-timeout 31536000 backup-lock-retry-count 0 dump-innodb-buffer-pool FALSE dump-innodb-buffer-pool-timeout 10 dump-innodb-buffer-pool-pct 0 safe-slave-backup FALSE rsync FALSE force-non-empty-directories FALSE no-server-version-check FALSE no-version-check FALSE tables-compatibility-check TRUE no-backup-locks FALSE rollback-prepared-trx FALSE decompress FALSE user (No default value) host (No default value) port 3306 socket /home/work/mysql_3306/mysql.sock incremental-history-name (No default value) incremental-history-uuid (No default value) decrypt NONE remove-original FALSE ftwrl-wait-query-type ALL kill-long-query-type SELECT kill-long-queries-timeout 0 ftwrl-wait-timeout 0 ftwrl-wait-threshold 60 debug-sleep-before-unlock 0 safe-slave-backup-timeout 300 check-privileges FALSE read-buffer-size 10485760 server-public-key-path (No default value) get-server-public-key FALSE ssl-ca (No default value) ssl-capath (No default value) ssl-cert (No default value) ssl-cipher (No default value) ssl-key (No default value) ssl-crl (No default value) ssl-crlpath (No default value) tls-version (No default value) tls-ciphersuites (No default value) ssl-session-data (No default value) ssl-session-data-continue-on-failed-reuse FALSE server-public-key-path (No default value) xtrabackup-plugin-dir (No default value) plugin-load (No default value) generate-new-master-key FALSE generate-transition-key FALSE keyring-file-data (No default value) component-keyring-config (No default value) component-keyring-file-config (No default value) parallel 1 strict TRUE rocksdb-checkpoint-max-age 0 rocksdb-checkpoint-max-count 0
全量备份流程总结：
-
复制已有的redo log，然后监听redo log变化并持续复制
-
复制事务引擎数据文件
-
等到数据文件复制完成
-
加锁：全局读锁
-
备份非事务引擎数据文件及其他文件
-
获取binlog点位信息等元数据
-
停止复制redo log
-
解锁：全局读锁
-
复制buffer pool dump
-
备份完成
#################
##############
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