昨天晚上在翻看一本书《MYSQL DBA精英实战课》时，看到了关于mydumper的使用内容。自己就在电脑上试用一下，看看效果如何。但使用过程中，还是出了不少问题的。
mydumper -uroot -pGood@2019 -t 8 -B test -o /data/backup/mydumper/
mydumper: error while loading shared libraries: libssl.so.10: cannot open shared object file: No such file or directory
在 百度上找了一圈，按照文章的方法试了，还是不行。系统既然提示libssl.so.10缺失，我就执行YUM吧。
无奈之下，我使用了yum install libssl*
Last metadata expiration check: 1:38:27 ago on Tue 11 Jun 2024 06:36:01 PM CST.
Package openssl-libs-1:1.1.1k-12.el8_9.x86_64 is already installed.
Dependencies resolved.
=======================================================================================
Package Arch Version Repository Size
=======================================================================================
Installing:
compat-openssl10 x86_64 1:1.0.2o-4.el8_6 ol8_appstream 1.1 M
dovecot x86_64 1:2.3.16-5.el8 ol8_appstream 5.2 M
nss x86_64 3.90.0-7.el8_10 ol8_appstream 750 k
Installing dependencies:
clucene-core x86_64 2.3.3.4-31.20130812.e8e3d20git.el8 ol8_appstream 596 k
nspr x86_64 4.35.0-1.el8_8 ol8_appstream 143 k
nss-softokn x86_64 3.90.0-7.el8_10 ol8_appstream 1.2 M
nss-softokn-freebl x86_64 3.90.0-7.el8_10 ol8_appstream 375 k
nss-sysinit x86_64 3.90.0-7.el8_10 ol8_appstream 74 k
nss-util x86_64 3.90.0-7.el8_10 ol8_appstream 139 k
Transaction Summary
=======================================================================================
Install 9 Packages
Total download size: 9.6 M
Installed size: 30 M
Is this ok [y/N]: y
Downloading Packages:
(1/9): compat-openssl10-1.0.2o-4.el8_6.x86_64.rpm 524 kB/s | 1.1 MB 00:02
(2/9): nspr-4.35.0-1.el8_8.x86_64.rpm 510 kB/s | 143 kB 00:00
(3/9): dovecot-2.3.16-5.el8.x86_64.rpm 1.9 MB/s | 5.2 MB 00:02
(4/9): nss-3.90.0-7.el8_10.x86_64.rpm 2.1 MB/s | 750 kB 00:00
(5/9): nss-softokn-3.90.0-7.el8_10.x86_64.rpm 3.4 MB/s | 1.2 MB 00:00
(6/9): nss-softokn-freebl-3.90.0-7.el8_10.x86_64.rpm 1.3 MB/s | 375 kB 00:00
(7/9): nss-sysinit-3.90.0-7.el8_10.x86_64.rpm 170 kB/s | 74 kB 00:00
(8/9): nss-util-3.90.0-7.el8_10.x86_64.rpm 284 kB/s | 139 kB 00:00
(9/9): clucene-core-2.3.3.4-31.20130812.e8e3d20git.el8 153 kB/s | 596 kB 00:03
---------------------------------------------------------------------------------------
Total 2.5 MB/s | 9.6 MB 00:03
Running transaction check
Transaction check succeeded.
Running transaction test
Transaction test succeeded.
Running transaction
Preparing : 1/1
Installing : nspr-4.35.0-1.el8_8.x86_64 1/9
Running scriptlet: nspr-4.35.0-1.el8_8.x86_64 1/9
Installing : nss-util-3.90.0-7.el8_10.x86_64 2/9
Installing : nss-softokn-freebl-3.90.0-7.el8_10.x86_64 3/9
Installing : nss-softokn-3.90.0-7.el8_10.x86_64 4/9
Installing : nss-3.90.0-7.el8_10.x86_64 5/9
Installing : nss-sysinit-3.90.0-7.el8_10.x86_64 6/9
Installing : clucene-core-2.3.3.4-31.20130812.e8e3d20git.el8.x86_64 7/9
Running scriptlet: dovecot-1:2.3.16-5.el8.x86_64 8/9
Installing : dovecot-1:2.3.16-5.el8.x86_64 8/9
Running scriptlet: dovecot-1:2.3.16-5.el8.x86_64 8/9
Installing : compat-openssl10-1:1.0.2o-4.el8_6.x86_64 9/9
Running scriptlet: compat-openssl10-1:1.0.2o-4.el8_6.x86_64 9/9
Running scriptlet: nss-3.90.0-7.el8_10.x86_64 9/9
Running scriptlet: dovecot-1:2.3.16-5.el8.x86_64 9/9
Running scriptlet: compat-openssl10-1:1.0.2o-4.el8_6.x86_64 9/9
Verifying : clucene-core-2.3.3.4-31.20130812.e8e3d20git.el8.x86_64 1/9
Verifying : compat-openssl10-1:1.0.2o-4.el8_6.x86_64 2/9
Verifying : dovecot-1:2.3.16-5.el8.x86_64 3/9
Verifying : nspr-4.35.0-1.el8_8.x86_64 4/9
Verifying : nss-3.90.0-7.el8_10.x86_64 5/9
Verifying : nss-softokn-3.90.0-7.el8_10.x86_64 6/9
Verifying : nss-softokn-freebl-3.90.0-7.el8_10.x86_64 7/9
Verifying : nss-sysinit-3.90.0-7.el8_10.x86_64 8/9
Verifying : nss-util-3.90.0-7.el8_10.x86_64 9/9
Installed:
clucene-core-2.3.3.4-31.20130812.e8e3d20git.el8.x86_64
compat-openssl10-1:1.0.2o-4.el8_6.x86_64
dovecot-1:2.3.16-5.el8.x86_64
nspr-4.35.0-1.el8_8.x86_64
nss-3.90.0-7.el8_10.x86_64
nss-softokn-3.90.0-7.el8_10.x86_64
nss-softokn-freebl-3.90.0-7.el8_10.x86_64
nss-sysinit-3.90.0-7.el8_10.x86_64
nss-util-3.90.0-7.el8_10.x86_64
重新执行mydumper -uroot -pGood@2019 -t 8 -B test -o /data/backup/mydumper/，
mydumper -uroot -pGood@2019 -t 8 -B test -o /data/backup/mydumper/
** (mydumper:15091): CRITICAL **: 20:14:57.018: option parsing failed: Error parsing option -r, try --help
这个错误我百度了一下，发现是由参数和实际内容不能直接连接所致。那我就在两者之间加一个空格
mydumper -u root -p Good@2019 -t 8 -B test -o /data/backup/mydumper/
果然成功执行了，没有报错。备份目录下，各种备份数据都在。
接着我试一下myloader,这是用来恢复数据了。这次提前把空的还原数据库建好，参数和实际内容之间也加一个空格。
成功执行，没有报错信息。
看一下数据库还原情况。
数据库确实还原成功了。
