Is MySQL group replication synchronous?

So yes the process of sending (replicating, streaming) the data to the other nodes is synchronous.

What is Galera replication?

Galera replication is a highly transparent, scalable, and virtually synchronous replication solution for database clustering to achieve high availability and improved performance. Galera-based clusters are: Highly available. Highly transparent.

What is group replication in MySQL?

MySQL Group Replication is a MySQL Server plugin that enables you to create elastic, highly-available, fault-tolerant replication topologies. There is a built-in group membership service that keeps the view of the group consistent and available for all servers at any given point in time.

What is MySQL Galera Cluster?

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. Read more about Galera Cluster >

How does group commit happen in Galera?

In Galera transactions are committed sequentially in total order determined by the group communication between nodes. This allows transactions to be committed in groups while still respecting sequential commit order.

How is replication done in MySQL?

Replication enables data from one MySQL database server (known as a source) to be copied to one or more MySQL database servers (known as replicas). Replication is asynchronous by default; replicas do not need to be connected permanently to receive updates from a source.

What type of replication does MySQL support?

Replication in MySQL features support for one-way, asynchronous replication, in which one server acts as the source, while one or more other servers act as replicas.

How does group replication work?

Group replication is a way of implementing a more flexible, fault-tolerant replication mechanism. This process involves establishing a pool of servers that are each involved in ensuring data is copied correctly. If the primary server experiences problems, member elections can select a new primary from the group.