Galera Cluster vs Microsoft SQL Server: What are the differences?
Introduction
Galera Cluster and Microsoft SQL Server are both popular options for database management. However, there are several key differences between the two.
1. Scalability: Galera Cluster is known for its ability to scale horizontally, allowing for the expansion of the cluster by simply adding new nodes. On the other hand, Microsoft SQL Server has traditionally focused on vertical scalability, allowing for the upgrade of hardware resources within a single node.
2. Replication Method: Galera Cluster utilizes a synchronous multi-master replication method, ensuring that data is consistent across all nodes in real-time. In contrast, Microsoft SQL Server uses asynchronous replication, which may result in some delay and potential data inconsistencies between replicas.
3. Data Distribution: Galera Cluster distributes data across all nodes using a mechanism known as "write-set replication". This allows for simultaneous reads and writes on multiple nodes, improving performance. In contrast, Microsoft SQL Server uses a primary-secondary replication model, where the primary node handles writes and secondary nodes handle read-only operations.
4. Operating Systems: Galera Cluster is compatible with a wide range of operating systems, including Linux and Windows, providing flexibility for users. In contrast, Microsoft SQL Server is primarily designed for Windows operating systems, limiting its compatibility options.
5. High Availability: Galera Cluster offers native support for high availability through its multi-master replication model. This ensures that if one node fails, the others can continue to function, minimizing downtime. On the other hand, Microsoft SQL Server requires additional configuration and clustering technologies to achieve high availability.
6. Licensing and Cost: Galera Cluster is an open-source solution, providing free access to its features and functionality. Microsoft SQL Server, on the other hand, is a commercial product with various licensing options, making it a more significant investment for users.
In Summary, Galera Cluster and Microsoft SQL Server differ in terms of scalability, replication method, data distribution, supported operating systems, high availability capabilities, and licensing cost.
