OrientDB VS Postgres-XC

Overall verdict

• OrientDB is generally considered a strong choice for certain use cases.

Why this product is good

• OrientDB is a multi-model database which supports graph, document, object, and key/value models. Its flexibility allows for more complex relationships between data entities and makes it suitable for applications requiring dynamic schema. It also boasts features like ACID transactions, horizontal scalability, and high performance querying.

Recommended for

• Applications requiring complex relationships between data points
• Organizations benefiting from a multi-model database
• Projects that require scalability and high-performance query execution
• Developers looking for a flexible schema architecture

Overall verdict

• Postgres-XC is a discontinued open-source project that provided write-scalable, multi-master synchronous PostgreSQL clustering, but it has been superseded by newer forks and is no longer actively maintained, making it a poor choice for new deployments today.

Why this product is good

• Was one of the earliest solutions to add horizontal write scalability to PostgreSQL through a distributed architecture
• Offered multi-master synchronous replication allowing reads and writes from any node
• Maintained strong consistency (ACID compliance) across the cluster, unlike many NoSQL alternatives
• Inspired successor projects like Postgres-XL and later influenced Citus and other distributed Postgres solutions
• Free and open-source, allowing full inspection and modification of the codebase

Recommended for

• Users researching the historical evolution of distributed PostgreSQL architectures
• Legacy systems still running Postgres-XC that need maintenance knowledge
• Developers evaluating old codebases before migrating to actively maintained alternatives like Postgres-XL, Citus, or YugabyteDB
• Not recommended for new production deployments due to lack of updates, security patches, and community support