Postgres-XL was a distributed relational database management system (RDBMS) software based on PostgreSQL. It aims to provide feature parity with PostgreSQL while distributing the workload over a cluster. The name "Postgres-XL" stands for "eXtensible Lattice". The last release of Postgres-XL was made in September 2018 and development ceased in October. The website has also gone offline. Some of the ideas and “smaller scale” features of Postgres-XL (parallel query, partitioning, distribution mindset) have been absorbed later by PostgreSQL. The major “Postgres-XL style” features (full shared-nothing horizontal write scale, built-in GTM, transparent multi-node sharding across the cluster in core) are not for PostgreSQL design, and the Big Data technological ecosystems followed other directions: see Citus and pg_duckdb (or pg_mooncake). More information...
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