前言:MySQL进行主主复制或主从复制的时候会在配置文件制定的目录下面产生相应的relay log,本文档总结这些相关参数的定义及解释. 1.什么是relay log The relay log, like the binary log, consists of a set of numbered files containing events that describe database changes, and an index file that contains the names of…

备库报错: Last_SQL_Errno: 1594 Last_SQL_Error: Relay log read failure: Could not parse relay log event entry. The possible reasons are: the master's binary log is corrupted (you can check this by running 'mysqlbinlog' on the binary log), the slave's rela…

今天在使用冷备份文件重做从库时遇到一个报错,值得研究一下. 版本:MySQL5.6.27 一.报错现象 dba:(none)> start slave; ERROR (HY000): Slave failed to initialize relay log info structure from the repository 这个时候查看error.log: 2017-07-17 16:19:02 9022 [ERROR] Failed to open the relay log './tjtx…

今天在使用冷备份文件重做从库时遇到一个报错,值得研究一下. 版本:MySQL5.6.27 一.报错现象 dba:(none)> start slave; ERROR (HY000): Slave failed to initialize relay log info structure from the repository 这个时候查看error.log: 2017-07-17 16:19:02 9022 [ERROR] Failed to open the relay log './tjtx…

写这篇文章是因为之前有一次删库操作,需要进行批量删除数据,当时没有控制好删除速度,导致产生了主从延迟,出现了一点小事故. 今天我们就来看看为什么会产生主从延迟以及主从延迟如何处理等相关问题. 坐好了,准备发车! 图注:思维导图 主从常见架构 随着日益增长的访问量,单台数据库的应接能力已经捉襟见肘.因此采用主库写数据,从库读数据这种将读写分离开的主从架构便随之衍生了出来. 在生产环境中,常见的主从架构有很多种,在这里给大家介绍几种比较常见的架构模式. 主从复制原理 了解了主从的基本架构及相关配置后…

2019独角兽企业重金招聘Python工程师标准>>> 作者:张学程 本文为 DM 源码阅读系列文章的第六篇,在 上篇文章 中我们介绍了 binlog replication 处理单元的实现,对在增量复制过程中 binlog event 的读取.过滤.路由.转换以及执行等逻辑进行了分析. 本篇文章我们将会对 relay 数据处理单元的实现进行详细的讲解.这个单元的作用是从上游 MySQL/MariaDB 读取 binlog event 并写入到本地的 relay log file 中:当…

mysql: [Warning] Using a password on the command line interface can be insecure. Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is Server version: 5.7.-log MySQL Community Server (GPL) Copyright (c) , , Oracle and/o…

root@localhost > show slave status\G*************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 10.38.153.53 Master_User: mysqlsync Master_Port: 3306 Connect_Retry: 60 Master_Log_File:…

--master log 与relay log的关系 -------------------------------2014/06/09 Just to clarify, there are three sets of file/position coordinates in SHOW SLAVE STATUS: 1) The position, ON THE MASTER, from which the I/O thread is reading: Master_Log_File/Read_M…

年后回来查看mysql运行状况与备份情况,登录mysql从库查看主从同步状态 mysql> show slave status\G; *************************** . row *************************** Slave_IO_State: Master_Host: 101.200.*.* Master_User: backup Master_Port: Connect_Retry: Master_Log_File: master-bin. Rea…