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How to configure a Galera Cluster with MariaDB?
The “Galera Provider Configuration” section configures the MariaDB components that provide a WriteSet replication API. This means Galera in your case, since Galera is a wsrep (WriteSet Replication) provider. You specify the general parameters to configure the initial replication environment.
What kind of database system does MariaDB use?
In an active-active cluster, every node is read-write and a change made to one is replicated to all. MariaDB is an open source relational database system that is fully compatible with the popular MySQL RDBMS system. You can read the official documentation for MariaDB at this page.
How to run multiple MariaDB instances on the same server?
In some cases, there may be easier ways to run multiple MariaDB Server instances on the same server, such as: Using dbdeployer . Starting multiple Docker containers. Login or signup to receive notifications when this page changes.
Is it better to use multiple databases with one schema each, or one?
You cannot replicate one schema only compared to the whole database. In a PostgreSQL context I recommend to use one db with multiple schemas, as you can (e.g.) UNION ALL across schemas, but not across databases.
You can learn about the settings in more detail on the Galera Cluster system configuration page. The “Galera Provider Configuration” section configures the MariaDB components that provide a WriteSet replication API. This means Galera in your case, since Galera is a wsrep (WriteSet Replication) provider.
What do you need to know about Galera clustering?
Galera is a database clustering solution that enables you to set up multi-master clusters using synchronous replication. Galera automatically handles keeping the data on different nodes in sync while allowing you to send read and write queries to any of the nodes in the cluster. You can learn more about Galera at the official documentation page.
Why does MySQL not work with Galera Cluster?
The first section modifies or re-asserts MariaDB/MySQL settings that will allow the cluster to function correctly. For example, Galera Cluster won’t work with MyISAM or similar non-transactional storage engines, and mysqld must not be bound to the IP address for localhost.
What do you need to know about Galera synchronization?
If your servers have private IP addresses, use them here. The “Galera Synchronization Configuration” section defines how the cluster will communicate and synchronize data between members. This is used only for the state transfer that happens when a node comes online.
How are writes done in an active passive cluster?
In active-passive clusters, all writes are done on a single active server and then copied to one or more passive servers that are poised to take over only in the event of an active server failure. Some active-passive clusters also allow SELECT operations on passive nodes.