What is relay log file?
The relay log is a set of log files created by a replica during replication. 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. Old relay log files are automatically removed once they are no longer needed.
What is relay master log file?
The term “relay log file” generally denotes an individual numbered file containing database events. The term “relay log” collectively denotes the set of numbered relay log files plus the index file. Relay log files have the same format as binary log files and can be read using mysqlbinlog (see Section 4.6.
How do I purge the relay log in MySQL?
From the MySQL manual: The SQL thread automatically deletes each relay log file after it has executed all events in the file and no longer needs it. There is no explicit mechanism for deleting relay logs because the SQL thread takes care of doing so.
How do I read a MySQL Binlog file?
You can use mysqlbinlog to read binary log files directly and apply them to the local MySQL server. You can also read binary logs from a remote server by using the –read-from-remote-server option. To read remote binary logs, the connection parameter options can be given to indicate how to connect to the server.
What is relay log file in MySQL?
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 all used relay log files. The term “relay log file” generally denotes an individual numbered file containing database events.
What is the use of relay log in MySQL?
The relay log, which is written by the replication I/O thread, contains the transactions read from the replication source server’s binary log. The transactions in the relay log are applied on the replica by the replication SQL thread. For information about the relay log, see Section 16.2. 4.1, “The Relay Log”.
What is Relay logs in MySQL?
What is flush logs in MySQL?
Flush log is used to flush the individual logs like Binary logs, general logs and error logs etc. There is a command-line interface provided by the mysql admin utility for flush operations, using commands such as flush-logs, flush-status, flush-hosts, flush-privileges and flush-tables.
What is Relay log file in MySQL?
What are MySQL Binlog files?
The binary log is a set of log files that contain information about data modifications made to a MySQL server instance. The log is enabled by starting the server with the –log-bin option. The binary log was introduced in MySQL 3.23.
What is MySQL binary log?
The binary log is a set of log files that contain information about data modifications made to a MySQL server instance. It contains all statements that update data. It also contains statements that potentially could have updated it (for example, a DELETE which matched no rows), unless row-based logging is used.
Where are MySQL binary logs stored?
The MySQL binary logs and index files are saved in the C:\ProgramData\MySQL\MySQL Server 8.0 directory. We can change the default location of the binary logs.
What is the relay log file in MySQL?
Relay_Master_Log_File: Relay log file containing the last successfully executed SQL statement on the Master that was executed on the Slave. Master_Log_File : The log on the Master that corresponds to the current relay log file and current relay log position
When do I delete the relay log file?
If the value of max_relay_log_size is 0, max_binlog_size determines the maximum relay log file size. The replication SQL (applier) thread automatically deletes each relay log file after it has executed all events in the file and no longer needs it.
What is the name of the relay Master log file?
Relay_Master_Log_File is actually the name of the binlog on the master containing the last SQL statement successfully executed on the slave. It is not the name of a relay log on the slave. See: http://dev.mysql.com/doc/refman/5.5/en/show-slave-status.html
What’s the best way to dump files from MySQL?
Consider using the MySQL Shell dump utilities, which provide parallel dumping with multiple threads, file compression, and progress information display, as well as cloud features such as Oracle Cloud Infrastructure Object Storage streaming, and MySQL Database Service compatibility checks and modifications.