How to ignore a table in MySQL replication?

How to ignore a table in MySQL replication?

In statements-based replication, replicate-ignore-db ignores statements having the default database as the database being ignored. In row-based replication, all tables in the specified database are ignored. This option ignores the one table specified. This is the most flexible option. All tables matching the expression will be ignored. For example:

Which is the default replication method in MySQL?

If any of the tables are not the same, this should be clearly visible in the checksum table. The default replication method of MySQL was the so called statement-based replication. This method is exactly what it is: a replication stream of every statement run on the master that will be replayed on the slave node.

Why does MySQL replication stall the replication stream?

This has to do with the fact that a DDL change will most of the time lock a table and only release this lock once the DDL change has been applied. It even gets worse once you start replicating these DDL changes through MySQL replication, where it will in addition stall the replication stream.

Is there a way to ignore a table in MySQL?

In this case, you will need to use the filters that ignore. There are three replications filters that can be used to ignore one or more tables: replicate-ignore-db. replicate-ignore-table. replicate-wild-ignore-table. Each of these options will be discussed below.

How does replicate ignore table work in MariaDB?

replicate_ignore_table The replicate_ignore_table system variable allows you to configure a replication slave to ignore statements and transactions that affect tables that match a specified name. The table name is specified in the format: dbname.tablename. This system variable will not work with cross-database updates with statement-based logging.

How to ignore a statement in a replication slave?

The replicate_ignore_db system variable allows you to configure a replication slave to ignore statements and transactions affecting databases that match a specified name. This system variable will not work with cross-database updates with statement-based logging or when using mixed-based logging and the statement is logged statement based.

Are there any replication filters that do not work?

Statements that use table names qualified with database names do not work with other replication filters such as replicate_do_table. This option can not be set dynamically. When setting it on the command-line or in a server option group in an option file, the option does not accept a comma-separated list.

What happens if I skip a transaction in MySQL?

If replication stops due to an issue with an event in a replicated transaction, you can resume replication by skipping the failed transaction on the replica. Before skipping a transaction, ensure that the replication I/O thread is stopped as well as the SQL thread. First you need to identify the replicated event that caused the error.

When to use ignore index or use Index in MariaDB?

You can tell the optimizer to not consider some particular index with the IGNORE INDEX option. This is used after the table name in the FROM clause: The benefit of using IGNORE_INDEX instead of USE_INDEX is that it will not disable a new index which you may add later.

How to replicate only some tables of MariaDB database?

Slave threads will be restricted to replicating tables that match the specified wildcard pattern. For example replicate-wild-do-table=foo%.bar% will replicate only updates to tables in all databases that start with foo and whose table names start with bar.

Is it possible to copy data from one database to another in MySQL?

You could write a script that takes the output from SHOW TABLES from one database and copies the schema to another. You should be able to reference schema+table names like: As far as the data goes, you can also do it in MySQL, but it’s not necessarily fast. After you’ve created the references, you can run the following to copy the data:

What kind of replication is supported in MySQL 8.0?

In MySQL 8.0, semisynchronous replication is supported in addition to the built-in asynchronous replication.

Is it possible to clone a database using MySQL?

Because uploading of mysqldumps is ugly slow if DB is over 2Gb. And you can’t clone InnoDB tables just by copying DB files (like snapshot backuping).