Which is better MySQL master or slave replication?

Which is better MySQL master or slave replication?

The master-slave replication is one of the most popular configurations of database replication. However, it is the master-master replication that has proven to be advantageous by enabling read/write operations from multiple servers. In this blog post, we will discuss how to perform MySQL master master replication.

How to enable master replication on server 2?

To enable master-master replication in the other direction (from Server 2 to Server 1), you must make note of the master log file and position . You still need to finish configuring replication back on Server 1. Running the following command will replicate all your data from Server 2:

Where does the replication start in MySQL Percona?

At the beginning of replication, the slave needs to be told from what binary log position it should start replicating the events from. This point is called a master log position and serves as coordinates at which the slave I/O thread should begin reading from the next time the thread starts.

When to use MySQL replication in a cloud migration?

Switching to another service provider (e.g., moving from AWS to Rackspace or from colocated servers to cloud) very often means one would build a brand new infrastructure in parallel, sync it with the old infrastructure and then switch over to it. To connect and sync them, you may want to leverage MySQL replication.

Can you back up master and MSDB at the same time?

For example, back up the master and msdb databases at the Publisher at the same time you back up the publication database. If the publication database is restored, ensure that the master and msdb database are consistent with the publication database in terms of replication configuration and settings.

How often should I back up my replicated database?

Replicated databases and their associated system databases should be backed up regularly. Back up the following databases: The master and msdb system databases at the Publisher, Distributor and all Subscribers. These databases should be backed up at the same time as each other and the relevant replication database.

How does MySQL copy user accounts from master to slave?

A note on user accounts: each database has its own directory in /var/lib/mysql – including a database called “mysql”. This is MySQL’s own database in which it stores users and their privileges. Hence, when you import all your previous databases into the slave, you’ll automatically copy all user accounts from the master too.

What should I do if MySQL replication fails?

If the MySQL master fails, replication breaks and the slave will need to switch to another master. You will need to promote the most updated slave node to be a master, and manually determine a new binary log file and position of the last transaction executed by the slave.

How to make MySQL source a replica of Replica 1?

When MySQL Source becomes available again, you should make it a replica of Replica 1. To do this, issue on MySQL Source the same CHANGE MASTER TO statement as that issued on Replica 2 and Replica 3 previously. MySQL Source then becomes a replica of Replica 1 and picks up the Web Client writes that it missed while it was offline.

When to run reset master on MySQL source?

During this procedure, do not forget to run RESET MASTER on MySQL Source before making Replica 1 , Replica 2, and Replica 3 replicas of MySQL Source. If you fail to do this, the replicas may pick up stale writes from the Web Client applications dating from before the point at which MySQL Source became unavailable.

Why is MySQL SQL thread not syncing with replication?

The SQL thread reads binlog events of the master from the relay logs. Doing sync-binlog only flushes master logs. By flushing relay logs and the associated replication status files, this should make reading replication status and binlog events from the relay logs more accurate.

Why is it important to know how to replication a database?

Server replication provides redundancy and allows the prevention of data loss. It also increases efficiency at the time of data access. Thus, knowing how to replicate your database is an important skill to have in your arsenal. The master-slave replication is one of the most popular configurations of database replication.

Do you need to show Master status on server 1?

You should use the values that “SHOW MASTER STATUS” returns on Server 1. To enable master-master replication in the other direction (from Server 2 to Server 1), you must make note of the master log file and position . You still need to finish configuring replication back on Server 1.