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https://github.com/rogervs/cadcadgolem

This package is a wrapper for cadCAD to dispatch the simulation workload to multiple Golem nodes.
https://github.com/rogervs/cadcadgolem

cadcad distributed-computing golem modelling simulation

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This package is a wrapper for cadCAD to dispatch the simulation workload to multiple Golem nodes.

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# cadCAD Golem



## **This project is out of date due to changes in the Golem api. There is currently no intention to update this project**



This package is a wrapper for cadCAD to dispatch the simulation workload to multiple Golem nodes.



[cadCAD](https://github.com/cadCAD-org/cadCAD) is a Python package that assists in the processes of designing, testing and validating complex systems through simulation, with support for Monte Carlo methods, A/B testing and parameter sweeping.



[Golem](https://golem.network/) is a global, open source, decentralized supercomputer that anyone can access. It is made up of the combined power of users' machines, from PC's to entire data centers.



## Note



* __As the Golem VM's are pregenerated, and don't yet have internet connectivity, if you use a library that is NOT preinstalled in the Golem VM, your code will fail. If cadCADGolem does not work for you, please create an [Issue](https://github.com/rogervs/cadcadgolem/issues), give a brief description, and please include the libraries that you are importing/using. I will then generate a new Golem VM to include your libraries, which will hopefully fix the issue.__



* The Golem network is still under development, and not all nodes behave perfectly. If your simulatino fails, try again a few times.



## Getting Started



### Demo Video



[![cadCAD Golem Installation and Use Demo](https://img.youtube.com/vi/HD_eM_bN1fM/0.jpg)](https://www.youtube.com/watch?v=HD_eM_bN1fM)



## Basic Overview Presentation

[cadCAD Golem Overview](https://github.com/rogervs/cadcadgolem/blob/master/cadcadGolem.pdf)



### Initialise/Create environment and working directory

If you are already using cadCAD, activate the virtual environment that you use for cadCAD. This might look something like:

```bash

source ~/.venv/cadcad

```



If you do not yet have a working directory or virtual environment, creat both and activate. Something like so:

```bash

mkdir -p ~/projects/cadcad-exp

cd ~/projects/cadcad-exp

python3 -m venv .venv

source .venv/bin/activate

```



Now you have an isolated environment where you can install your python packages without fear of bloating the rest of your system.



### Install cadcadgolem

Requires [>= Python 3.8](https://www.python.org/downloads/)



#### Install Using [pip](https://pypi.org/project/cadCAD/)

```bash

$ pip3 install cadcadgolem

```



### Install *yagna daemon*



The Yagna daemon is what you will use to interface with the Golem network. It runs in the background, waiting for API calls from your applications, in our case, from *cadcadgolem*.



To install yagna, you can use their helper script:

```

curl -sSf https://join.golem.network/as-requestor | bash -

```



For manual installation instructions, see: (https://handbook.golem.network/requestor-tutorials/flash-tutorial-of-requestor-development)



To check it is installed corretly, run:

```

yagna --version

```



### Prepare *yagna daemon*

To run the yagna daemon, follow the following sequence. This sequence will need to be followed everytime you restart *yagna*.



#### Start the daemon

This will initialise the daemon

```

yagna service run

```



#### Generate the app key (*This only has to done once after initial install of `yagna`*)

```

yagna app-key create requestor

```



This should produce a 32-character-long hexadecimal app key that you need to note down as it will be needed in your code to run the requestor agent.



#### Get some coinage

Golem currently has a faucet where you can get free tokens to pay for the processing that you will perform on the network.

```

yagna payment init -r

```



#### Check that the fund transfer was successfull.

```

yagna payment status

```



#### Add your app-key to your code

When using cadcadgolem, a dictionary is passed that contains the parameters for your interaction with the network. One of them is yor app-key, which allows you to speak to the *yagna* daemon that you started earlier. Place your app-key into your dictionary (see dictionary below).



## Using cadcad Golem



To use cadcad Golem, you need to do three things:



1. Import the cadcad Golem Ambassador:

```

from cadcadgolem.golem_embassy import Ambassador

```

2. Define the golem_conf dictionary:

    ```

    golem_conf = {

            'NODES': 3, # Number of nodes to utilise from the Golem Network. If you've got a big simulation to run, try pushing this up to 30. Remember you need at least twice as many simulation runs as you have nodes.

            'BUDGET': 10.0, # Maximum amount of crypto you are prepared to spend

            'SUBNET': "community.3", # choose your subnet, currently this is the test network

            'YAGNA_APPKEY': '', # get this from `yagna app-key list`

            'TIMEOUT': 120 # In seconds - you will need to figure this out for your workload. Max currently is 25min, so 25 * 60 seconds

            }

    ```

    [Example](https://github.com/rogervs/cadcad_models/blob/dc17128d2a0b874c809529230d17f5c387418cc3/simple_cadcad.py#L71-L77)

    

3. Wrap your cadcad `Executor` in the cadcad Golem `Ambassador`:

    ```

    Executor = Ambassador(Executor, golem_conf)

    ```

    [Example](https://github.com/rogervs/cadcad_models/blob/dc17128d2a0b874c809529230d17f5c387418cc3/simple_cadcad.py#L79)



* Jupyter Notebook Example: [minimal_param_sweep.ipynb](https://github.com/rogervs/cadcadgolem/blob/master/minimal_param_sweep.ipynb)

* Python script Example:  [simple_cadcad.py](https://github.com/rogervs/cadcad_models/blob/master/simple_cadcad.py)



## System initialisation after first install

1. `yagna service run`

2. `yagna payment init -r`

3. Run your cadCAD code!



## cadCAD Examples/Demos



You can find more cadCAD demos to play with here: https://github.com/cadCAD-org/demos

To modify them them to work with cadcadGolem, just add the golem_conf dictionary declaration as above, and then wrap the cadCAD `Executor` with the cadCADGolem `Ambassador` and you're done.



## Security Notice

The communication on the Golem network is currently not encrypted, so do not use this for any sensitive data.



## Caveats

You need at least twice as many simulation runs as you have nodes, else it the simulation will fail.