Install and schema setup — Part 2

Perfect—that output means no PostgreSQL cluster exists yet. Let’s create a fresh one and start it.

Step — Create and start the default cluster

bash

sudo pg_createcluster 14 main --start

Run that and tell me what it prints. After it starts, we’ll verify, then set up your user/database and enable pgvector.

Great—Postgres 14 is up and running on port 5432. Next we’ll install pgvector.

Next step — install pgvector (via PGXN)

bash

sudo pgxn install vector

You should see it download/build and finish without errors.
Paste the last couple lines if anything looks weird, and then we’ll enable the extension inside Postgres.

Awesome. Postgres is up and pgvector is installed.
Let’s go one step at a time.

Step 1 — Enable pgvector (sanity check)

bash

sudo -u postgres psql -c "CREATE EXTENSION IF NOT EXISTS vector;"

Reply with what it prints, and we’ll do the next step.

Perfect — the CREATE EXTENSION worked, so pgvector is live. 🎉

To your question about the venv (virtual environment):
– The database itself (postgres, pgvector) runs outside Python, so you don’t need to be in your venv for those steps.
– You’ll only need the venv once we move to Python code (rag_*.py, embeddings, ingestion).

So the split is:
– DB admin commands → no venv needed (these are sudo -u postgres ..., psql, etc.).
– Python scripts → yes, activate your venv first (source venv/bin/activate).

✅ Right now you’re still on the DB side, so you’re fine.

Do you want to move on to Step 2: create your new clean database named tokenspace?

Perfect — the schema you uploaded is the clean, 768-dim version and it’s fully self-contained. It only relies on PostgreSQL + the vector and pg_trgm extensions, no outside services【243†file-Nk1GfYHBuKDuwihnPVB4Go】.

Here’s our next move, step-by-step, to create a new database called tokenspace and apply that schema:

1. Create the database

Run this as your normal user (not inside the venv):

sudo -u postgres createdb tokenspace

2. Connect into it

sudo -u postgres psql -d tokenspace

That will drop you into the psql prompt. You’ll see something like:

psql (14.x)
Type "help" for help.

tokenspace=#

3. Apply the schema

While inside psql, load your schema file:

\i '/home/darren/Desktop/TokenSpace Database Schema 768dim final.txt';

(adjust the path if the file is somewhere else).

If everything goes clean, you’ll see CREATE TABLE, CREATE INDEX, etc. scroll by.

Do you want to go ahead with step 1 (create the tokenspace DB) now?

That’s fine — the “could not change directory” warning just means Postgres couldn’t cd into /home/darren/Desktop when running under the postgres user. It doesn’t stop the command itself.

Let’s double-check whether the database was created successfully. Run:

sudo -u postgres psql -lqt | cut -d \| -f 1 | grep -w tokenspace

If it prints tokenspace, then the DB is there and we can move on to step 2 (connecting to it).

Want to try that check?

Good call to pause here. There’s no “C:” on Ubuntu—your current Postgres cluster lives on the root filesystem at:

/var/lib/postgresql/14/main

(That’s what we saw when it started up earlier.) If you want the database on a different disk, we should move the cluster data directory to that disk before we load your schema.

Let’s do this one step at a time.

Step 1 — Find the mount point of your storage disk

bash

df -h

This will list all mounted filesystems and their mount points (e.g., /mnt/storage, /media/darren/BigDrive, etc.).

Reply with the line that corresponds to the storage disk you want to use (or just tell me its mount path), and I’ll give you the exact next command using that path.

Perfect 👍 /mnt/storage is your 4 TB disk. Right now, Postgres is using /var/lib/postgresql/14/main on the root drive. If you want all DB files on /mnt/storage, we’ll need to move the cluster data directory there and point Postgres at it.

Here’s the safe step-by-step:

Step 1 — Stop Postgres

sudo systemctl stop postgresql

Step 2 — Move the cluster data directory

We’ll move the current cluster directory to your storage disk. Let’s call the new directory /mnt/storage/postgres14.

sudo rsync -av /var/lib/postgresql/14/main /mnt/storage/postgres14

This copies everything while keeping permissions and symlinks intact. (We’ll remove the old one later once it works.)

Step 3 — Point Postgres at the new location

Edit the cluster’s config to tell it where to look.

sudo nano /etc/postgresql/14/main/postgresql.conf

Find the line that starts with:

data_directory = 

If it’s commented out (# at the start), add or change it to:

data_directory = '/mnt/storage/postgres14'

Save and exit (Ctrl+O, Enter, then Ctrl+X).

Step 4 — Start Postgres again

sudo systemctl start postgresql

Step 5 — Verify

sudo -u postgres psql -c "SHOW data_directory;"

It should print /mnt/storage/postgres14.

👉 Do you want me to walk you through Step 1 now, and we’ll confirm each step before moving on? That way nothing gets broken.

Good catch. The service isn’t starting because Postgres is looking at the wrong folder.

When we ran:

sudo rsync -av /var/lib/postgresql/14/main /mnt/storage/postgres14

that created /mnt/storage/postgres14/main (note the extra /main). But you set:

data_directory = '/mnt/storage/postgres14'

Postgres expects the actual data directory (the one that contains PG_VERSION, base/, etc.). That’s /mnt/storage/postgres14/main.

Let’s fix it step-by-step.

1) Verify the paths (bash)

ls -ld /mnt/storage/postgres14 /mnt/storage/postgres14/main
ls /mnt/storage/postgres14/main | head

You should see a main directory and inside it things like PG_VERSION, base, global, etc.

2) Point Postgres to the correct directory (bash → edit, then save)

sudo nano /etc/postgresql/14/main/postgresql.conf

Change the line to exactly:

data_directory = '/mnt/storage/postgres14/main'

Save: Ctrl+O, Enter. Exit: Ctrl+X.

3) Ensure ownership and permissions (bash)

sudo chown -R postgres:postgres /mnt/storage/postgres14
sudo chmod 700 /mnt/storage/postgres14/main

4) Start Postgres (bash)

sudo systemctl start postgresql

5) Check status & data dir (bash)

pg_lsclusters

You want to see 14 | main | 5432 | online.

sudo -u postgres psql -c "SHOW data_directory;"

It should print /mnt/storage/postgres14/main.

6) If it still won’t start, show the log (bash)

sudo journalctl -u postgresql -n 50 --no-pager

or

sudo tail -n 100 /var/log/postgresql/postgresql-14-main.log

Paste the last 20–30 lines if there’s an error, and I’ll zero in on it.

All good — that “Permission denied” on listing /mnt/storage/postgres14/main is expected as your user; it’s 700 and owned by postgres. The important parts look right:

• Parent: /mnt/storage/postgres14 → root:root 755
• Data dir: /mnt/storage/postgres14/main → postgres:postgres 700

Now let’s point Postgres at the exact path and start it.

1) Confirm the config points to /mnt/storage/postgres14/main

bash

sudo grep -n '^data_directory' /etc/postgresql/14/main/postgresql.conf

You want to see:

data_directory = '/mnt/storage/postgres14/main'

If not, edit and fix it:

sudo nano /etc/postgresql/14/main/postgresql.conf

Change to:

data_directory = '/mnt/storage/postgres14/main'

Save (Ctrl+O, Enter), exit (Ctrl+X).

2) Start PostgreSQL

bash

sudo systemctl start postgresql

3) Verify cluster status

bash

pg_lsclusters

You want to see: 14 | main | 5432 | online

4) Double-check the active data dir

bash

sudo -u postgres psql -c "SHOW data_directory;"

It should print /mnt/storage/postgres14/main.

If it doesn’t come online, immediately show the last log lines so I can pinpoint the issue:

bash

sudo journalctl -u postgresql -n 50 --no-pager

Paste the last ~20 lines you see and we’ll fix it fast.

Good catch — it’s not okay to have it pointing to /mnt/storage/postgres14 (without /main).
Postgres needs the actual data dir (the one that contains PG_VERSION, base/, etc.), which is:

/mnt/storage/postgres14/main

Let’s fix it now. One step at a time:

1) Edit the config to include /main

bash

sudo nano /etc/postgresql/14/main/postgresql.conf

Use the arrow keys to get to the data_directory line and change it to exactly:

data_directory = '/mnt/storage/postgres14/main'

Save + exit Nano: Ctrl+O, Enter, Ctrl+X.

2) Restart PostgreSQL

bash

sudo systemctl restart postgresql

3) Verify the cluster is online

bash

pg_lsclusters

You want to see:

Ver Cluster Port Status  Owner    Data directory
14  main    5432 online  postgres /mnt/storage/postgres14/main

4) Double-check the active data dir from psql

bash

sudo -u postgres psql -c "SHOW data_directory;"

It should print:

/mnt/storage/postgres14/main

If anything doesn’t match or it fails to start, run this and paste the last 20–30 lines:
bash

sudo journalctl -u postgresql -n 50 --no-pager

Beautiful — Postgres is now running from /mnt/storage/postgres14/main. ✅

Let’s proceed one step at a time.

Step: create a DB role for you (darren)

bash

sudo -u postgres psql -c "CREATE ROLE darren WITH LOGIN PASSWORD 'change_this_password';"

• If it says the role already exists, that’s fine; tell me what it printed.
• After this, we’ll create the tokenspace database owned by darren.

Yep, that’s exactly what happened 😅 — your role darren was created with the literal password:

change_this_password

No harm done — we can reset it now before moving forward.

Step: reset your password

bash

sudo -u postgres psql -c "ALTER ROLE darren WITH PASSWORD 'your_new_password_here';"

👉 Replace your_new_password_here with something you’ll actually remember (no spaces, wrap in single quotes).

After that, I’ll walk you through creating the tokenspace database owned by you, so you don’t need to log in as postgres all the time.

Do you want me to suggest a safe but simple password style for this, or do you already have one in mind?

All good—you ran into Bash’s history expansion: ! inside double quotes gets treated specially by the shell. Your second command (no !) worked and the password is now set.

Next step: create the tokenspace database owned by you

bash

sudo -u postgres createdb -O darren tokenspace

If it prints nothing, that’s success. If there’s any message, paste it and we’ll handle it.

(FYI for later) How to safely use ! in passwords on the command line

If you ever want a password with !, use one of these patterns so Bash won’t mangle it:

• Use single quotes around the entire -c argument and escape inner quotes:
  bash
sudo -u postgres psql -c 'ALTER ROLE darren WITH PASSWORD '\''LittleOugway1!'\'';'
• Or disable history expansion for that command:
  bash
set +H; sudo -u postgres psql -c "ALTER ROLE darren WITH PASSWORD 'LittleOugway1!';"; set -H
• Or avoid the shell entirely:
  bash
sudo -u postgres psql <<'SQL'
ALTER ROLE darren WITH PASSWORD 'LittleOugway1!';
SQL

But you’re fine with the current password you set. Let’s get the DB created next.

Perfect — that tells us the database tokenspace already exists. So we don’t need to create it again.

Now let’s confirm you (as darren) can connect to it:

1) Switch into your own role and DB

bash

psql -U darren -d tokenspace

• If it asks for a password, enter the one you just set (LittleOugway).
• You should land in a prompt that looks like:
  tokenspace=>

2) Quit psql (once you see it works)

Inside psql, quit with:

\q

Once we confirm you can log in as darren into the tokenspace DB, the next step will be applying your schema file to build the tables, indexes, etc.

Want me to prep the exact psql command to apply your TokenSpace Database Schema 768dim final.txt file once you’re inside?

Awesome. We’ll apply the schema now—one step.

Step — run the schema file (inside psql on tokenspace)

If you’re not already at the tokenspace=> prompt:

psql -U darren -d tokenspace

Now at the tokenspace=> prompt, run exactly one of these (pick the path/name you actually have):

A) If the file is on your Desktop with spaces in the name:

\pset pager off
\i '/home/darren/Desktop/TokenSpace Database Schema 768dim final.txt'

B) If you prefer to avoid spaces, first (in bash) rename it, then load it:

mv ~/Desktop/"TokenSpace Database Schema 768dim final.txt" ~/Desktop/tokenspace_schema_768.sql

Back in psql:

\pset pager off
\i '/home/darren/Desktop/tokenspace_schema_768.sql'

It should stream a bunch of CREATE … / CREATE INDEX … messages.
When it finishes, just paste me the last 10–15 lines you see, and we’ll do a quick verification step next.