Mysqlhotcopy热备本工具介绍

官方介绍

mysqlhotcopy is a Perl script that was originally written and contributed by Tim Bunce. It uses FLUSH TABLES, LOCK TABLES, and  cp   or  scp   to make a database backup. It is a fast way to make a backup of the database or single tables, but it can be run only on the same machine where the database directories are located. mysqlhotcopy works only for backing up  MyISAM   and  ARCHIVE   tables. It runs on Unix and NetWare.

To use mysqlhotcopy, you must have read access to the files for the tables that you are backing up, theSELECT privilege for those tables, the RELOAD privilege (to be able to execute FLUSH TABLES), and theLOCK TABLES privilege (to be able to lock the tables).

 

Mysqlhotcopy适用于小型数据库，适用 flush tables,locktables,cp(scp)备份数据库

shell#mysqlhotcopy -u 用户 备份数据库名称  目标文件夹

执行报错 :

install_driver(mysql) failed: Can't locate DBD/mysql.pm in @INC (@INC contains: /usr/local/lib/perl5 /usr/local/share/perl5 /usr/lib/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib/perl5 /usr/share/perl5 .) at (eval 12) line 3.

Perhaps the DBD::mysql perl module hasn't been fully installed,

or perhaps the capitalisation of 'mysql' isn't right.

Available drivers: DBM, ExampleP, File, Gofer, Proxy, SQLite, Sponge.

 at /usr/local/mysql/bin/mysqlhotcopy line 178

原因 :缺少 perl连接数据库驱动

解决办法：

安装 perl-DBD-MySQL 和 perl-DBI

关于 DBD 和 DBI 介绍

DBI is a database-independent interface for the Perl programming language. DBD::mysql is the driver for connecting to MySQL database servers with DBI.

・         DBI is the basic abstraction layer for working with databases in Perl.

・         DBD::mysql is the driver for using MySQL with DBI.

・         Net::MySQL is a pure-Perl implementation of the MySQL client-server protocol. (It is not necessary when using DBI with DBD::mysql, but may be useful in environments where you are not able to compile the MySQL client library required by DBD::mysql.)

http://dev.mysql.com/downloads/dbi.html

 

 

接下来执行备份还是报错，

Invalid db.table name 'mysql.mysql`.`columns_priv' at /usr/local/mysql/bin/mysqlhotcopy line 854.

在网上查了下是 mysqlhotcopy脚本的 bug

解决办法

http://bugs.mysql.com/bug.php?id=27303

在 my @dbh_tables = eval { $dbh->tables() }； (应该是 834行 )这行下面添加

map { s/^.*?\.//o } @dbh_tables;

 

 

mysqlhotcopy常用参数

 

 --addtodest                        不重命名目标文件 (如果存在 ),合并它们【增量备份】

--allowold                          

--checkpoint                        后面跟数据库名和表名 ,记录 mysqlhotcopy操作记录

--host                                 

--port                                 

--user                                 

--tmpdir                             

--socket                              

--method                             使用 cp或者 scp，默认使用 cp