What is Galera used for?

Galera Cluster for MySQL is a true Multi-Master Cluster based on synchronous replication. It’s an easy-to-use, high-availability solution, which provides high system up-time, no data loss and scalability for future growth.

Is Galera free?

Galera Cluster software is free to download and use, along with MySQL and MariaDB software for the database component of a cluster.

Is Galera Cluster Open Source?

Galera Cluster is a synchronous multi-master replication plug-in for InnoDB. This plug-in is open-source and developed by Codership as a patch for standard MySQL.

What is Galera Cluster technology?

Galera Cluster is a synchronous multi-master database cluster, based on synchronous replication and MySQL and InnoDB. When Galera Cluster is in use, database reads and writes can be directed to any node. Any individual node can be lost without interruption in operations and without using complex failover procedures.

What is Galera in openstack?

Database (Galera Cluster) for high availability¶ Galera Cluster is a synchronous multi-master database cluster, based on MySQL and the InnoDB storage engine. It is a high-availability service that provides high system uptime, no data loss, and scalability for growth.

What is Galera arbitrator?

Galera Arbitrator is a member of a cluster that participates in voting, but not in the actual replication. Warning. While Galera Arbitrator does not participate in replication, it does receive the same data as all other nodes. You must secure its network connection.

How can I check my Galera status?

To verify a MySQL Galera cluster status, select from the following options:

1. Log in to the Salt Master node.
2. Apply the following state: salt -C ‘I@galera:master’ mysql.status | \ grep -EA1 ‘wsrep_(local_state_c|incoming_a|cluster_size)’

What is Garbd?

Galera Arbitrator is a separate daemon from Galera Cluster, called garbd . This means that you must start it separately from the cluster. It also means that you cannot configure Galera Arbitrator through the my. cnf configuration file.

How do I set up Galera arbitrator?

To configure Galera Arbitrator on Ubuntu/Debian you need to edit the /etc/default/garb file. On CentOS/RHEL configuration can be found in /etc/sysconfig/garb file. To set it up you’ll need to add the information about the cluster you’ve set up.