“Mysqldump”的版本间的差异
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[https://www.cnblogs.com/ITtangtang/p/7612237.html 数据仓库：Mysql大量数据快速导出 ] | [https://www.cnblogs.com/ITtangtang/p/7612237.html 数据仓库：Mysql大量数据快速导出 ] | ||
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[[category:mysql]] | [[category:mysql]] | ||
2020年12月13日 (日) 05:48的版本
忽略多个表
tables=" tempData worldSceneCitys"
mysqldump -u root -p'xx' -h 127.0.0.1 --opt --default-character-set=utf8 --triggers -R --hex-blob --single-transaction --no-autocommit --master-data=2 ftsgqxz_12 ${tables[@]} > 1.sql
#对数据表进行过滤操作#
tables=`/usr/local/services/mysql/bin/mysql -h ${gamedbip} -P${dbport} -u${users} -p${dbpass} $gamedbname -e "show tables" | grep -Ev '^m_|^Tables_in'`;
#从数据库导出到管理机指定目录
mysqldump -h ${dbip} -P${dbport} -u${users} -p${dbpass} --opt --default-character-set=utf8 --triggers -R --hex-blob --single-transaction --no-autocommit --master-data=2 ${gamedbname} ${tables[@]} > ${backurl}/${gamedbname}/${gamedbname}_${backdatet}.sql;
--master-data选项
mysqldump --help
--master-data[=#] This causes the binary log position and filename to be
appended to the output. If equal to 1, will print it as a
CHANGE MASTER command; if equal to 2, that command will
be prefixed with a comment symbol. This option will turn
--lock-all-tables on, unless --single-transaction is
specified too (in which case a global read lock is only
taken a short time at the beginning of the dump; don't
forget to read about --single-transaction below). In all
cases, any action on logs will happen at the exact moment
of the dump. Option automatically turns --lock-tables
off.
--master-data[=#] 在备份导出的文件里追加二进制binlog文件的位置和名称
如果值等于1，就会添加一个CHANGE MASTER语句
如果值等于2，就会在CHANGE MASTER语句前添加注释（不起作用了呗~）
这个参数会--lock-all-tables锁表，除非你指定了--single-transaction
这种情况下，锁表只会在dump开始的时候持续一小段时间,照理说
在dump的时候，任何动作都会影响到binlog文件
dump结束之后，选项会自动关闭锁表功能
--master-data选项的作用就是将二进制的信息写入到输出文件中，在这里是写入到备份的sql文件中
If the option value is 2, the CHANGE MASTER TO statement is written as an SQL comment, and thus is informative only; it has no effect when the dump file is reloaded.
If the option value is 1, the statement is not written as a comment and takes effect when the dump file is reloaded.
If no option value is specified, the default value is 1.
如果选项赋值为2，那么CHANGE MASTER TO 语句会被写成一个SQL comment（注释），从而只提供信息;
如果选项赋值为1，那么语句不会被写成注释并且在dump被载入时生效。
如果没有指定，默认值为1。
see also
mysqldump备份时，--master-data选项的作用是什么
mysqldump 使用 --set-gtid-purged
mysqldump提示Warning: A partial dump from a server that has GTIDs
