This version is based off: https://github.com/Jaxnode-UG/jaxnodelangchain utilizing many of the example methods to interface with Ollama using Langchain, but expanding on it by setting up a Node JS Express API and a Vite React Front end interface to interact with the models and documents easier.

The User Interface:

Note: The processing of very large documents is currently a time consuming step, uploading a plain text document with 60k lines took roughly 23 minutes to process on a machine running an RTX 3080ti and a Ryzen 9 5900x. It would be easier to manually add documents to the raw folder and running on the terminal npm run batch-process-documents or simply uploading large documents at night to leave the system running for a few hours. After the documents are processed the questions about the document will happen much faster, but that also depends on the Ollama model you have chosen to use.

Note: For the time being: Please refrain to using only .txt files formatted with utf8 to ensure they are processed properly.

1. Running Version of Ollama, please see: ollama.com
2. Node JS, please see: NodeJS.org
3. Docker Desktop or a PostgresQL Database, please see docker.com or postgresql.org

• create a `.env`` file at the root of the project directory and add the following contents to it (Ensure to replace connection information to match your postgres server):

PG_HOST=localhost
PG_PORT=5432
PG_USER=postgres
PG_PWD=password
PG_DATABASE=ollamavector
MODEL_NAME=llama2
MODEL_URL="http://localhost:11434"
PORT=8080

• Ensure to start the database using docker

docker run -d --name pgvector -e POSTGRES_PASSWORD=password -v ${HOME}/pgvector/:/var/lib/postgresql/data -p 5432:5432 pgvector/pgvector:pg16

Now that we have started a database server on our computer with Docker, we can log into the running container to create a database that we can use to store our vectors.

docker exec -it pgvector psql -U postgres
create database ollamavector;
# DATABASE CREATED
CREATE EXTENSION IF NOT EXISTS vector;
# EXTENSION vector CREATED
\q