For molecular modelers, heavy computational tasks in molecular dynamics simulations can be a bottleneck when performed on local machines. These tasks often require significant computational power, which can lead to long wait times or even make it impractical to perform certain simulations. Enter the GROMACS Wizard on SAMSON, which allows you to execute these stages seamlessly in the cloud — leveraging dedicated cloud hardware to offload intensive jobs.
In this post, we’ll explore how to use the cloud computation feature of GROMACS Wizard for molecular dynamics stages such as NVT Equilibration, NPT Equilibration, and Production Molecular Dynamics Simulation. By utilizing the cloud, you not only save local resources but also perform more complex calculations with ease.
Why Cloud-Based Simulations?
Let’s face it: molecular simulations can be resource-demanding. Whether you’re equilibrating a complex system or running a production molecular dynamics simulation, your local machine might struggle with the requirements. By moving these tasks to the cloud, you can:
- Save time and resources: Free up your local machine for other tasks.
- Avoid local limitations: Computationally intensive systems can run without hardware restrictions.
- Gain flexibility: Start, pause, or cancel jobs as needed.
GROMACS Wizard seamlessly integrates cloud job management into SAMSON, allowing you to focus on the science, not the logistics.
Preparing for Cloud Computations
Before launching your simulations on the cloud, here are a few simple steps to ensure everything runs smoothly:
Step 1: Check Your Credits
To launch a cloud job, you need at least one computing credit in your SAMSON Connect account. You can check your available credits either in SAMSON via the Job Manager or on the SAMSON Connect website. If you need more credits, simply purchase them through this link. The advantage? Only machine and storage costs are charged — file transfers are entirely free.
Step 2: Validate Your System
Before sending simulations to the cloud, it’s a good idea to validate the setup locally. Run a small test with a few steps to catch obvious issues early. If your system is too large to run locally, you can use the Generate inputs option instead, which ensures the setup is valid before spending credits.
Launching a Cloud Job
With your system prepared, follow these steps to launch a computational job in the cloud:
- Select Machine Specifications: When clicking the Equilibrate in the cloud or Simulate in the cloud button, you’ll access a dialog to select the machine type, storage size, and see the associated costs. For testing purposes, you can choose a 4-vCPU machine with no GPU, which is slower but highly cost-effective for small runs.
- Confirm the Job: Review the job details in a security dialog before launching the job. Here, you’ll also see the predicted costs and remaining credits. Finalize by clicking OK.
Monitoring Progress and Managing Jobs
After submission, you can monitor the job using the Job Manager in SAMSON. The interface displays essential details like progress, costs, and completion status. Additionally, you can:
- Pause or cancel a job at any stage through the context menu.
- View estimated completion times and detailed progress indicators to stay updated.
Once the job is finished, you’ll be notified via email and messages in SAMSON. You can then proceed to download the results and import them for further analysis.
Downloading and Using Results
After your simulation finishes, results are available for download through the Job Manager. You can opt to download specific files or all files at once. Results include essential outputs like trajectory files, which can be directly imported into the GROMACS Wizard for further analysis and visualization.
Remember to delete jobs from the cloud storage if you no longer need them, to avoid storage charges affecting your credits.
Learn More
Harnessing the power of cloud computing for molecular dynamics is now easier than ever with SAMSON’s GROMACS Wizard. By following this guide, you’ll save time, enhance efficiency, and focus on optimizing your simulations. Consult the full documentation here for more details.
Note: SAMSON and all SAMSON Extensions are free for non-commercial use. Get SAMSON at https://www.samson-connect.net.