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What is Galera Cluster MySQL?

By Isabella Wilson |

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.

How MySQL Galera Cluster works?

Galera Cluster is a synchronous multi-master replication plug-in for InnoDB. An application can write to any node in a Galera cluster, and transaction commits (row-based replication events) are then applied on all servers, via a certification-based replication.

Is Galera Cluster free?

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

How does MariaDB Galera Cluster work?

MariaDB Galera Cluster implements a multi-primary replication solution. When you write to a table on a node, the node collects the write into a write-set transaction, which it then replicates to the other nodes in the cluster. If the transaction has no conflicts, the nodes apply it.

How do I setup a Galera cluster?

Setup MariaDB Galera Cluster on Ubuntu 18.04

  1. Step 1: Install MariaDB database server on Galera nodes.
  2. Step 2: Configure First Galera Cluster node.
  3. Step 3: Configure other Galera Cluster Nodes.
  4. Step 4: Start Galera Cluster on Ubuntu 18.04.
  5. Step 5: Test Galera Cluster Operation.
  6. Step 6: Install and Configure HAProxy.

How do I set up a Galera cluster?

  1. Step 1 — Adding the MariaDB Repositories to All Servers.
  2. Step 2 — Installing MariaDB on All Servers.
  3. Step 3 — Configuring the First Node.
  4. Step 4 — Configuring the Remaining Nodes.
  5. Step 5 — Opening the Firewall on Every Server.
  6. Step 6 — Creating a SELinux Policy.
  7. Step 7 — Starting the Cluster.
  8. Step 8 — Testing Replication.

What is bootstrap in MySQL?

You bootstrap MySQL Router against an InnoDB ReplicaSet or InnoDB Cluster to automatically configure routing. The bootstrap process is a specific way of running MySQL Router, which does not start the usual routing and instead configures the mysqlrouter. conf file based on the metadata.