The Citus database is an open source extension to Postgres that gives you all the greatness of Postgres, at any scale—from a single node to a large distributed database cluster. Because Citus is an extension (not a fork) to Postgres, when you use Citus, you are also using Postgres. You can leverage the latest Postgres features, tooling, and ecosystem.

References and Resources

Citus Official Website (opens new window)

Citus Official Documentation (opens new window)

Citus Official repository (opens new window)

ANNEXES A - Installing on OpenBSD

ftp https://github.com/citusdata/citus/archive/refs/tags/v12.1.0.tar.gz
tar zxvf v12.1.0.tar.gz
# sys/stat.h must be added in ./src/backend/distributed/commands/multi_copy.c
# file for compatiblity
#    #include <sys/stat.h>
./configure CC=$(which cc) LDFLAGS=-L/usr/local/lib CPPFLAGS=-I/usr/local/include
make
make install