Installation

1. You must have Docker and Python 3 installed.
2. pip install hydra-cli (or as desired for your preferred Python environment)

Getting Started

Just run hydra and we'll take care of the rest!

$ hydra

This will:

1. run hydra setup if needed
2. run hydra connect --start
   1. start the server
   2. open a psql shell
   3. stop the server and cleanup when you exit the shell

To exit the psql shell, use exit, \q or ^D.

Now you're ready to follow our quickstart guide to learn more about serverless analytics with Hydra.

Any data stored in duckdb tables are stored in Hydra's cloud service. Data saved in Postgres (heap) tables will be stored in a local Docker volume and is not persisted to the cloud.

Commands

You can run hydra help for a list of commands, and hydra COMMAND --help to get help about any command.

$ hydra setup
 - asks for token; optional port, username, password
$ hydra start
 - starts service
$ hydra connect
 - connects to service via psql
$ hydra connect --start
 - automatically starts and stops the service around a psql session
$ hydra stop
 - stops service
$ hydra config
 - prints stored config info
$ hydra teardown
 - prompts to delete configuration files
 - prompts to delete docker volume
$ hydra help
$ hydra --help
 - prints reference top-level information for the CLI
$ hydra COMMAND --help
 - prints helpful information about the command

Configuration

Configuration is persistent. Once you specify your settings, it will remember what port you used. If would like to change the settings, you can run hydra setup again. You can also change the port number at any time with hydra start.

Configuration files

By default, configuration is saved to hydra-cli in your platform's user data directory:

• Mac OS X: ~/Library/Application Support/hydra-cli
• Linux: ~/.local/share/hydra-cli

You can specify a different configuration directory with -C/--config-dir, but you will need to pass this in with every execution.

Uninstalling

1. hydra stop removes the running container, if one remains.
2. hydra teardown will confirm removal of the configuration files and the Docker volume, respectively.
3. pip uninstall hydra-cli will remove the CLI itself.