I tracked down the cause to a binlog rotation happening on the original master. The relay log is a set of log files created by a replica during replication.. The following are my replication settings: [MASTER] # # Replication Options # binlog-do-db=quadrant binlog-do-db=reportschedule binlog-do-db=mysql relay-log=dev82-relay-bin [SLAVE] # # Replication settings # If a master.info file exists, then master-* options are ignored. Now think about replication … Finally, something better has arrived, the binlog_space_limit variable, introduced in Percona Server 5.7.23 on September 2018 (ported to 8.0 as well). The applier thread’s Relay_Log_File and Relay_Log_Pos values are then set to new relay log file and position. binlog的主要作用是记录数据库中表的更改,它只记录改变数据的sql,不改变数据的sql不会写入,比如select语句一般不会被记录,因为他们不会对数据产生任何改动。 Before in our articles we use only single MySQL server. Analyzing the relay log and position above revealed that the ‘sequence number’ of the transaction at this point was reset to 1. If you read the question carefully, you'll notice it says "Relay log corrupted" — that's because we had already used mysqlbinlog in the manner you suggest, and found out that the relay log (not the master log) had been corrupted. Hi, thanks for your answer. 今天我们来深挖一下mysql的复制机制到底有哪一些,以及binlog和relay-log的结构到底是什么样子的。 binlog作用. BINLOG ' It consists of a set of relay log files and an index file containing a list of all relay log … It's the same format as the binary log, containing a record of events that affect the data or structure; thus, mysqlbinlog can be used to display its contents. So in practice the receiver thread copies the applied position from the applier thread and starts pulling the master binary log events from that point forward. I get the errors "Failed to open the relay log '.\asafs1-relay-bin.005819' (relay_log_pos 236)" "Could not find target log during relay log initialization" "Failed to initialize the master info structure" I tried to issue the command The Binlog Dump Thread. Typically, for direct slaves, there is a rotate event due to which relay logs would also rotate based on master binary log rotation. When the slave connects to the master, the master uses this thread to send the slave the contents of its binary log. MySQL Forums Forum List » Replication. またはMySQL 5.0 以降の場合は、I/O スレッドが開始されるたびに。 2.FLUSH LOGS実行時。 3.規程のサイズを超えたとき。 ※max_relay_log_sizeもしくはmax_binlog_sizeに準ずる。 1.の他はマスタのバイナリログにおける仕様と同じみたいだ。 relay-log.infoについて Advanced Search. In MySQL 5.6.22, we made this procedure even smarter. 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