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AtomSpace Postgres StorageNode

CircleCI

Save and restore AtomSpace contents as well as individual Atoms to a PostgreSQL database. Implements the PostgresStorageNode specialization of the Atomese base type StorageNode.

Status

This is Version 5.1.0

Deprecated -- This repo is a copy of the old Postgres storage implementation. It works "fine", it passes unit tests. It's 100% compatible with what it always was -- It's just a copy of that old code. However, years of experience have revealed that the design is not all that great. A new Postgres backend should be written, based on the RocksStorageNode, in the atomspace-rocks git repo.

Some missing features include:

  • Frames (multiple nested AtomSpaces)

Building and Installing

The build and install of atomspace-pgres follows the same pattern as other AtomSpace projects.

Postgres is a prerequisite. On Debian/Ubuntu, apt install postgresql postgresql-client libpq-dev Then build, install and test:

    cd to project dir atomspace-pgres
    git checkout master
    git pull
    rm -r build
    mkdir build
    cd build
    cmake ..
    make -j
    make -j check
    sudo make install

Example Usage

See the examples directory in the main AtomSpace repo, here and look for examples that contain the word Storage. There are half-a-dozen of these.

Design

Old design notes and a performance diary can be found in the source tree.