文章目录
-
- 前言
- [1. 安装备份工具](#1. 安装备份工具)
-
- [1.1 环境介绍](#1.1 环境介绍)
- [1.2 RPM 安装](#1.2 RPM 安装)
- [1.3 验证](#1.3 验证)
- [2. 配置备份工具](#2. 配置备份工具)
-
- [2.1 初始化设置](#2.1 初始化设置)
- [2.2 创建备份用户](#2.2 创建备份用户)
- [2.3 配置自动归档](#2.3 配置自动归档)
- [3. 工具使用介绍](#3. 工具使用介绍)
-
- [3.1 init](#3.1 init)
- [3.2 add-instance](#3.2 add-instance)
- [3.3 del-instance](#3.3 del-instance)
- [3.4 set-config](#3.4 set-config)
- [3.5 show-config](#3.5 show-config)
- [3.6 set-backup](#3.6 set-backup)
- [3.7 backup](#3.7 backup)
- [3.8 show](#3.8 show)
- [3.9 delete](#3.9 delete)
- [3.10 restore](#3.10 restore)
- [3.11 catchup](#3.11 catchup)
- [3.12 archive-push](#3.12 archive-push)
- [3.13 archive-get](#3.13 archive-get)
- [3.14 checkdb](#3.14 checkdb)
- [3.15 validate](#3.15 validate)
- [3.16 merge](#3.16 merge)
前言
pg_probackup 是一款功能强大的开源 PostgreSQL 备份工具,和 MySQL 社区 XtraBackup 类似,本篇文章将和各位共同探索学习。
1. 安装备份工具
1.1 环境介绍
环境介绍:CentOS Linux release 7.8.2003 (Core)
数据库版本:PostgreSQL - 12.2
1.2 RPM 安装
bash
# RPM Centos Packages
rpm -ivh https://repo.postgrespro.ru/pg_probackup/keys/pg_probackup-repo-centos.noarch.rpm
# pg_probackup-这里写 PG 对应的大版本
yum install pg_probackup-{15,14,13,12,11}
yum install pg_probackup-{15,14,13,12,11}-debuginfo
官方 Github 有安装说明,可以根据环境安装指引安装,上面是 CentOS 环境安装方法。
1.3 验证
RPM 安装完成后会自动配置环境变量,这里我安装的是 12 版本,所以使用 pg_probackup-12 命令操作工具:
bash
pg_probackup-12 --help
2. 配置备份工具
2.1 初始化设置
初始化备份目录:
bash
pg_probackup-12 init -B ${backup_dir}
pg_probackup-12 init -B /data/pgsql12/backup
INFO: Backup catalog '/data/pgsql12/backup' successfully initialized
添加新的备份实例:
bash
# 本地实例
pg_probackup-12 add-instance -B ${backup_dir} -D ${PGDATA} --instance ${instance_name}
# 添加远程实例
pg_probackup-12 add-instance -B ${backup_dir} -D ${PGDATA} --instance ${instance_name} --remote-prot=ssh --remote-host=${remote_ip} --remote-port=${remote_ssh_port} --remote-user=${remote_ssh_user} --remote-path=${pg_probackup_dir}
pg_probackup-12 add-instance -B /data/pgsql12/backup/ -D /data/pgsql12/data/ --instance test01
INFO: Instance 'test01' successfully initialized
2.2 创建备份用户
PostgreSQL versions 10 - 14 备份用户创建语句:
sql
BEGIN;
CREATE ROLE backup WITH LOGIN;
GRANT USAGE ON SCHEMA pg_catalog TO backup;
GRANT EXECUTE ON FUNCTION pg_catalog.current_setting(text) TO backup;
GRANT EXECUTE ON FUNCTION pg_catalog.set_config(text, text, boolean) TO backup;
GRANT EXECUTE ON FUNCTION pg_catalog.pg_is_in_recovery() TO backup;
GRANT EXECUTE ON FUNCTION pg_catalog.pg_start_backup(text, boolean, boolean) TO backup;
GRANT EXECUTE ON FUNCTION pg_catalog.pg_stop_backup(boolean, boolean) TO backup;
GRANT EXECUTE ON FUNCTION pg_catalog.pg_create_restore_point(text) TO backup;
GRANT EXECUTE ON FUNCTION pg_catalog.pg_switch_wal() TO backup;
GRANT EXECUTE ON FUNCTION pg_catalog.pg_last_wal_replay_lsn() TO backup;
GRANT EXECUTE ON FUNCTION pg_catalog.txid_current() TO backup;
GRANT EXECUTE ON FUNCTION pg_catalog.txid_current_snapshot() TO backup;
GRANT EXECUTE ON FUNCTION pg_catalog.txid_snapshot_xmax(txid_snapshot) TO backup;
GRANT EXECUTE ON FUNCTION pg_catalog.pg_control_checkpoint() TO backup;
COMMIT;
PostgreSQL versions 15 备份用户创建语句:
sql
BEGIN;
CREATE ROLE backup WITH LOGIN;
GRANT USAGE ON SCHEMA pg_catalog TO backup;
GRANT EXECUTE ON FUNCTION pg_catalog.current_setting(text) TO backup;
GRANT EXECUTE ON FUNCTION pg_catalog.set_config(text, text, boolean) TO backup;
GRANT EXECUTE ON FUNCTION pg_catalog.pg_is_in_recovery() TO backup;
GRANT EXECUTE ON FUNCTION pg_catalog.pg_backup_start(text, boolean) TO backup;
GRANT EXECUTE ON FUNCTION pg_catalog.pg_backup_stop(boolean) TO backup;
GRANT EXECUTE ON FUNCTION pg_catalog.pg_create_restore_point(text) TO backup;
GRANT EXECUTE ON FUNCTION pg_catalog.pg_switch_wal() TO backup;
GRANT EXECUTE ON FUNCTION pg_catalog.pg_last_wal_replay_lsn() TO backup;
GRANT EXECUTE ON FUNCTION pg_catalog.txid_current() TO backup;
GRANT EXECUTE ON FUNCTION pg_catalog.txid_current_snapshot() TO backup;
GRANT EXECUTE ON FUNCTION pg_catalog.txid_snapshot_xmax(txid_snapshot) TO backup;
GRANT EXECUTE ON FUNCTION pg_catalog.pg_control_checkpoint() TO backup;
COMMIT;
用户创建完成后,注意 pg_hba.conf 放开 backup 用户。
2.3 配置自动归档
配置 wal 自动归档需要调整如下参数:
bash
# 自动归档的时间,单位为秒,可酌情设置,建议 1 分钟
max_wal_senders = 60
# 开启归档
archive_mode = 'on'
# WAL 格式,归档必须是 replica 及更高级别
wal_level = 'replica'
# 配置归档命令
archive_command = 'pg_probackup-12 archive-push -B /data/pgsql12/backup --instance test01 --wal-file-path=%p --wal-file-name=%f'
配置完成后,需要重启数据库,可以使用下方命令查看归档信息:
bash
pg_probackup-12 show -B /data/pgsql12/backup --instance test01 --archive
3. 工具使用介绍
使用 pg_probackup-12 --help
可以看到该工具主要分为几块功能,本小节会详细介绍。
bash
pg_probackup-12 - utility to manage backup/recovery of PostgreSQL database.
pg_probackup-12 help [COMMAND]
pg_probackup-12 version
pg_probackup-12 init -B backup-path
pg_probackup-12 set-backup -B backup-path --instance=instance_name
-i backup-id [--ttl=interval] [--expire-time=timestamp]
[--note=text]
[--help]
pg_probackup-12 show-config -B backup-path --instance=instance_name
[--format=format]
[--help]
....................
3.1 init
bash
pg_probackup-12 init -B backup-path
初始化备份目录,安装完 pg_probackup 需要做的事情,这里相当于给 pg_probackup-12 创建一个工作目录,管理备份文件和归档文件 pg_probackup 可以用于管理多个实例的备份。
例如:
bash
pg_probackup-12 init -B /pg_data/backup
将 /pg_data/backup 设置为备份工具的 home 目录。
3.2 add-instance
bash
pg_probackup-12 add-instance -B backup-path -D pgdata-path
--instance=instance_name
[--external-dirs=external-directories-paths]
[--remote-proto] [--remote-host]
[--remote-port] [--remote-path] [--remote-user]
[--ssh-options]
添加需要备份的实例信息 pg_probackup 可以管理多个实例的备份,可以作为备份管理中心。
添加本地备份实例,例如:
bash
pg_probackup-12 add-instance -B /pg_data/backup -D /data/pgsql12/data --instance node01
将本地数据目录为 /pg_data/backup 的 PostgreSQL 添加到备份管理中心。如果要添加远程备份实例,需要先配置互信。
bash
## 在远程备份实例主机上
# su - postgres
$ ssh-keygen
$ ssh-copy-id postgres@${备份机_ip}
## 在备份机上
# su - postgres
$ ssh-keygen
$ ssh-copy-id postgres@${备份实例主机_ip}
## 测试互信
$ ssh postgres@${对方IP}
添加远程实例:
bash
pg_probackup-12 add-instance -B /data/pgsql12/backup -D /data/pgsql/data --instance test02 --remote-prot=ssh --remote-host=172.16.104.55 --remote-port=22 --remote-user=postgres
INFO: Instance 'test02' successfully initialized
3.3 del-instance
bash
pg_probackup-12 del-instance -B backup-path
--instance=instance_name
[--help]
从备份元数据中心里删除实例信息。例如:
bash
pg_probackup-12 del-instance -B /data/pgsql12/backup/ --instance test02
INFO: Delete: RZXNFS 2023-08-25 14:02:16+08
INFO: Delete: RZXNEX 2023-08-25 14:01:45+08
INFO: Delete: RZXND9 2023-08-25 14:00:45+08
INFO: Delete: RZXNCL 2023-08-25 14:00:21+08
INFO: Delete: RZXNA5 2023-08-25 13:58:53+08
INFO: Delete: RZXN9V 2023-08-25 13:58:43+08
INFO: Instance 'test02' successfully deleted
3.4 set-config
bash
pg_probackup-12 set-config -B backup-path --instance=instance_name
[-D pgdata-path]
[--external-dirs=external-directories-paths]
[--log-level-console=log-level-console]
[--log-level-file=log-level-file]
[--log-format-file=log-format-file]
[--log-filename=log-filename]
[--error-log-filename=error-log-filename]
[--log-directory=log-directory]
[--log-rotation-size=log-rotation-size]
[--log-rotation-age=log-rotation-age]
[--retention-redundancy=retention-redundancy]
[--retention-window=retention-window]
[--wal-depth=wal-depth]
[--compress-algorithm=compress-algorithm]
[--compress-level=compress-level]
[--archive-timeout=timeout]
[-d dbname] [-h host] [-p port] [-U username]
[--remote-proto] [--remote-host]
[--remote-port] [--remote-path] [--remote-user]
[--ssh-options]
[--restore-command=cmdline] [--archive-host=destination]
[--archive-port=port] [--archive-user=username]
[--help]
可以配置备份保留策略,及一些配置参数,例如配置备份保留策略:
bash
pg_probackup-12 set-config -B /pg_data/backup --instance node01 --retention-redundancy 7 --retention-window 7
3.5 show-config
bash
pg_probackup-12 show-config -B backup-path --instance=instance_name
[--format=format]
[--help]
查看备份服务的参数配置信息。
3.6 set-backup
bash
pg_probackup-12 set-backup -B backup-path --instance=instance_name
-i backup-id [--ttl=interval] [--expire-time=timestamp]
[--note=text]
[--help]
修改备份文件的元数据信息。
3.7 backup
bash
pg_probackup-12 backup -B backup-path -b backup-mode --instance=instance_name
[-D pgdata-path] [-C]
[--stream [-S slot-name] [--temp-slot]]
[--backup-pg-log] [-j num-threads] [--progress]
[--no-validate] [--skip-block-validation]
[--external-dirs=external-directories-paths]
[--no-sync]
[--log-level-console=log-level-console]
[--log-level-file=log-level-file]
[--log-format-console=log-format-console]
[--log-format-file=log-format-file]
[--log-filename=log-filename]
[--error-log-filename=error-log-filename]
[--log-directory=log-directory]
[--log-rotation-size=log-rotation-size]
[--log-rotation-age=log-rotation-age] [--no-color]
[--delete-expired] [--delete-wal] [--merge-expired]
[--retention-redundancy=retention-redundancy]
[--retention-window=retention-window]
[--wal-depth=wal-depth]
[--compress]
[--compress-algorithm=compress-algorithm]
[--compress-level=compress-level]
[--archive-timeout=archive-timeout]
[-d dbname] [-h host] [-p port] [-U username]
[-w --no-password] [-W --password]
[--remote-proto] [--remote-host]
[--remote-port] [--remote-path] [--remote-user]
[--ssh-options]
[--ttl=interval] [--expire-time=timestamp] [--note=text]
[--help]
启动备份的方法,下面详细介绍该功能参数:
- -B, --backup-path=backup-path:备份工具 init 的目录。
- -b, --backup-mode=backup-mode :备份的模式,有 FULL、PAGE、DELTA、PTRACK 四种模式。
- FULL:创建一个完整备份,其中包含要恢复的集群的所有数据文件。
- PAGE:根据自上次完整或增量备份以来生成的 WAL 文件创建增量备份。仅从数据文件中读取更改的块。
- DELTA:读取数据目录中的所有数据文件,并为自上次备份以来已更改的页面创建增量备份。
- PTRACK:动态创建增量备份跟踪页面更改。
- -C, --smooth-checkpoint:将检查点分散在一段时间内。默认情况下, pg_probackup 尝试尽快完成检查点。
- --instance=instance_name:实例名,通过指定实例名,备份工具会根据元数据查到该实例的信息。
- --stream:如果在备份命令中加入该参数,表示使用流模式备份 WAL 日志。
- -S, --slot=SLOTNAME:指定 WAL 流的复制槽。该选项只能与 --stream 标志一起使用。
- -j, --threads=NUM:并发几个线程来进行备份。
使用案例,在本地发起备份:
bash
pg_probackup-12 backup -B /data/pgsql12/backup/ --instance test01 -b full
INFO: Database backup start
INFO: wait for pg_start_backup()
INFO: Wait for WAL segment /data/pgsql12/backup/wal/test01/00000002000000020000007E to be archived
INFO: PGDATA size: 2397MB
INFO: Current Start LSN: 2/7E000028, TLI: 2
INFO: Start transferring data files
INFO: Data files are transferred, time elapsed: 39s
INFO: wait for pg_stop_backup()
INFO: pg_stop backup() successfully executed
INFO: stop_lsn: 2/7F0000F0
INFO: Getting the Recovery Time from WAL
INFO: Syncing backup files to disk
INFO: Backup files are synced, time elapsed: 1s
INFO: Validating backup RZXNYO
INFO: Backup RZXNYO data files are valid
INFO: Backup RZXNYO resident size: 2400MB
INFO: Backup RZXNYO completed
使用案例,发起远程备份:
bash
pg_probackup-12 backup -B /data/pg_backup --instance test02 --remote-user='postgres' --remote-host='172.16.104.7' --remote-proto=ssh --stream --remote-port=22 -b full
INFO: Database backup start
INFO: wait for pg_start_backup()
INFO: Wait for WAL segment /data/pg_backup/backups/test02/S04Q23/database/pg_wal/000000020000000200000092 to be streamed
INFO: PGDATA size: 2405MB
INFO: Current Start LSN: 2/92000028, TLI: 2
INFO: Start transferring data files
INFO: Data files are transferred, time elapsed: 40s
INFO: wait for pg_stop_backup()
INFO: pg_stop backup() successfully executed
INFO: stop_lsn: 2/920001A0
INFO: Getting the Recovery Time from WAL
INFO: Syncing backup files to disk
INFO: Backup files are synced, time elapsed: 1s
INFO: Validating backup S04Q23
INFO: Backup S04Q23 data files are valid
INFO: Backup S04Q23 resident size: 2439MB
INFO: Backup S04Q23 completed
接下来测试增量备份:
bash
# 先发起一个物理全量备份
pg_probackup-12 backup -B /pg_data/backup --instance node01 -b full
查看备份信息:
bash
======================================================================================================================================
Instance Version ID Recovery Time Mode WAL Mode TLI Time Data WAL Zratio Start LSN Stop LSN Status
======================================================================================================================================
node01 12 S0GD3F 2023-09-04 16:33:57+08 FULL ARCHIVE 3/0 44s 2446MB 16MB 1.00 4/E9000028 4/EA000128 OK
测试制造数据变动:
sql
update pgbench_accounts set bid = 6;
基于上次的全备,进行增量备份:
bash
pg_probackup-12 backup -B /pg_data/backup --instance node01 -b page
bash
======================================================================================================================================
Instance Version ID Recovery Time Mode WAL Mode TLI Time Data WAL Zratio Start LSN Stop LSN Status
======================================================================================================================================
node01 12 S0GDJI 2023-09-04 16:43:24+08 PAGE ARCHIVE 3/3 31s 1090MB 16MB 1.00 5/6D000110 5/6E0000F0 OK
node01 12 S0GD3F 2023-09-04 16:33:57+08 FULL ARCHIVE 3/0 44s 2446MB 16MB 1.00 4/E9000028 4/EA000128 OK
3.8 show
bash
pg_probackup-12 show -B backup-path
[--instance=instance_name [-i backup-id]]
[--format=format] [--archive]
[--no-color] [--help]
该方法用于查看备份列表信息和归档信息。使用案例,查看备份信息:
bash
pg_probackup-12 show -B /data/pg_backup/
bash
BACKUP INSTANCE 'test02'
======================================================================================================================================
Instance Version ID Recovery Time Mode WAL Mode TLI Time Data WAL Zratio Start LSN Stop LSN Status
======================================================================================================================================
test02 12 S04Q23 2023-08-29 09:42:50+08 FULL STREAM 2/0 54s 2407MB 32MB 1.00 2/92000028 2/920001A0 OK
使用案例,查看归档信息:
bash
pg_probackup-12 show -B /data/pgsql12/backup/ --archive
bash
ARCHIVE INSTANCE 'test01'
==================================================================================================================================
TLI Parent TLI Switchpoint Min Segno Max Segno N segments Size Zratio N backups Status
==================================================================================================================================
2 0 0/0 000000020000000200000072 000000020000000200000092 32 512MB 1.00 0 DEGRADED
3.9 delete
bash
pg_probackup-12 delete -B backup-path --instance=instance_name
[-j num-threads] [--progress]
[--retention-redundancy=retention-redundancy]
[--retention-window=retention-window]
[--wal-depth=wal-depth]
[-i backup-id | --delete-expired | --merge-expired | --status=backup_status]
[--delete-wal]
[--dry-run] [--no-validate] [--no-sync]
[--help]
该方法用于删除备份,或删除过期的归档日志。例如:
bash
pg_probackup-12 delete -B /pg_data/backup/ --instance node01 -i S0G7IN
# INFO: Delete: S0G7IN 2023-09-04 14:32:47+08
删除过期的备份和 WAL 日志:
bash
pg_probackup-12 delete -B /pg_data/backup --instance node01 --delete-expired --delete-wal
3.10 restore
bash
pg_probackup-12 restore -B backup-path --instance=instance_name
[-D pgdata-path] [-i backup-id] [-j num-threads]
[--recovery-target-time=time|--recovery-target-xid=xid
|--recovery-target-lsn=lsn [--recovery-target-inclusive=boolean]]
[--recovery-target-timeline=timeline]
[--recovery-target=immediate|latest]
[--recovery-target-name=target-name]
[--recovery-target-action=pause|promote|shutdown]
[--restore-command=cmdline]
[-R | --restore-as-replica] [--force]
[--primary-conninfo=primary_conninfo]
[-S | --primary-slot-name=slotname]
[--no-validate] [--skip-block-validation]
[-T OLDDIR=NEWDIR] [--progress]
[--external-mapping=OLDDIR=NEWDIR]
[--skip-external-dirs] [--no-sync]
[-X WALDIR | --waldir=WALDIR]
[-I | --incremental-mode=none|checksum|lsn]
[--db-include | --db-exclude]
[--remote-proto] [--remote-host]
[--remote-port] [--remote-path] [--remote-user]
[--ssh-options]
[--archive-host=hostname]
[--archive-port=port] [--archive-user=username]
[--help]
该方法用于将备份恢复到新的 PostgreSQL 实例,如果指定恢复目标参数,pg_probackup 会查找最近的备份并将其恢复到指定的恢复目标,如果没有提供备份 ID 也没有提供恢复目标选项, pg_probackup 使用最新的备份来执行恢复。
全量备份恢复案例:
bash
# 停掉 PostgreSQL
pg_ctl -D /data/pgsql12/data/ -l /data/pgsql12/logs/start.log stop
# 删掉数据目录
rm -rf /data/pgsql12/data
# 使用备份恢复,这里用的是远程备份恢复
pg_probackup-12 restore -B /data/pg_backup --instance test02 --remote-user='postgres' --remote-host='172.16.104.7' --remote-proto=ssh --stream --remote-port=22
# 使用备份恢复,这里是本地备份
pg_probackup-12 restore -B /data/pgsql12/backup/ --instance test01 -i S08V98
# 恢复后启动 PostgreSQL
pg_ctl -D /data/pgsql12/data/ -l /data/pgsql12/logs/start.log start
INFO: Validating backup S04Q23
INFO: Backup S04Q23 data files are valid
INFO: Backup S04Q23 WAL segments are valid
INFO: Backup S04Q23 is valid.
INFO: Restoring the database from backup at 2023-08-29 09:42:03+08
INFO: Start restoring backup files. PGDATA size: 2437MB
INFO: Backup files are restored. Transfered bytes: 2437MB, time elapsed: 52s
INFO: Restore incremental ratio (less is better): 100% (2437MB/2437MB)
INFO: Syncing restored files to disk
INFO: Restored backup files are synced, time elapsed: 3s
INFO: Restore of backup S04Q23 completed.
3.11 catchup
bash
pg_probackup-12 catchup -b catchup-mode
--source-pgdata=path_to_pgdata_on_remote_server
--destination-pgdata=path_to_local_dir
[--stream [-S slot-name] [--temp-slot | --perm-slot]]
[-j num-threads]
[-T OLDDIR=NEWDIR]
[--exclude-path=path_prefix]
[-d dbname] [-h host] [-p port] [-U username]
[-w --no-password] [-W --password]
[--remote-proto] [--remote-host]
[--remote-port] [--remote-path] [--remote-user]
[--ssh-options]
[--dry-run]
[--help]
3.12 archive-push
bash
pg_probackup-12 archive-push -B backup-path --instance=instance_name
--wal-file-name=wal-file-name
[--wal-file-path=wal-file-path]
[-j num-threads] [--batch-size=batch_size]
[--archive-timeout=timeout]
[--no-ready-rename] [--no-sync]
[--overwrite] [--compress]
[--compress-algorithm=compress-algorithm]
[--compress-level=compress-level]
[--remote-proto] [--remote-host]
[--remote-port] [--remote-path] [--remote-user]
[--ssh-options]
[--help]
该方法用于备份归档文件, 可将该命令添加到 PostgreSQL 参数文件中。
bash
# 自动归档的时间,单位为秒,可酌情设置,建议 1 分钟
max_wal_senders = 60
# 开启归档
archive_mode = 'on'
# WAL 格式,归档必须是 replica 及更高级别
wal_level = 'replica'
# 配置归档命令
archive_command = 'pg_probackup-12 archive-push -B /data/pgsql12/backup --instance test01 --wal-file-path=%p --wal-file-name=%f'
3.13 archive-get
bash
pg_probackup-12 archive-get -B backup-path --instance=instance_name
--wal-file-path=wal-file-path
--wal-file-name=wal-file-name
[-j num-threads] [--batch-size=batch_size]
[--no-validate-wal]
[--remote-proto] [--remote-host]
[--remote-port] [--remote-path] [--remote-user]
[--ssh-options]
[--help]
该方法用于将 WAL 文件从备份目录拷贝到 PostgreSQL WAL 日志目录,用于 PITR。该命令由 pg_probackup 自动设置 Restore_command 用户可不用关心如何设置。
3.14 checkdb
bash
pg_probackup-12 checkdb [-B backup-path] [--instance=instance_name]
[-D pgdata-path] [--progress] [-j num-threads]
[--amcheck] [--skip-block-validation]
[--heapallindexed] [--checkunique]
[--help]
通过检测物理和逻辑损坏来验证 PostgreSQL 数据库集群的正确性。
3.15 validate
bash
pg_probackup-12 validate -B backup-path [--instance=instance_name]
[-i backup-id] [--progress] [-j num-threads]
[--recovery-target-time=time|--recovery-target-xid=xid
|--recovery-target-lsn=lsn [--recovery-target-inclusive=boolean]]
[--recovery-target-timeline=timeline]
[--recovery-target-name=target-name]
[--skip-block-validation]
[--help]
该方法用于验证备份的正确性。使用案例,验证 test02 实例编号为 S04Q23 的备份。
bash
pg_probackup-12 validate -B /data/pg_backup -i S04Q23 --instance test02
INFO: Validating backup S04Q23
INFO: Backup S04Q23 data files are valid
INFO: Backup S04Q23 WAL segments are valid
INFO: Backup S04Q23 is valid.
INFO: Validate of backup S04Q23 completed.
3.16 merge
bash
pg_probackup-12 merge -B backup-path --instance=instance_name
-i backup-id [--progress] [-j num-threads]
[--no-validate] [--no-sync]
[--help]
该方法用于合并增量备份,合并备份文件。