For molecular modelers, running computationally intensive simulations on local machines can be a challenge, especially when working with large systems or complex molecular dynamics steps. Fortunately, SAMSON’s GROMACS Wizard delivers a convenient solution for executing these tasks in the Cloud, making powerful computations more accessible and efficient.
Why Consider Cloud-Based Computations?
Computing resource limitations are a frequent bottleneck for modelers performing equilibration or production molecular dynamics simulations. Upgrading hardware can be costly, and, depending on the project, the required computational power might not always justify long-term investments. By leveraging the cloud, SAMSON provides a scalable and balanced alternative: it enables running heavy computational jobs on demand while offering control over performance and cost.
How to Get Started
Setting up cloud jobs through the GROMACS Wizard in SAMSON is straightforward. Here’s an overview of what you need to do:
Step 1: Prepare and Check the System
Before submitting your job to the cloud, ensure that your system and simulation setup are correct. If possible, test the setup locally for a few hundred steps to catch obvious issues upfront. For systems too large to run locally, SAMSON allows you to generate inputs to validate parts of the setup, saving you computing credits and time.
Step 2: Select and Configure Cloud Resources
To launch a GROMACS simulation in the cloud, click the Equilibrate in the cloud or Simulate in the cloud button in the GROMACS Wizard. SAMSON provides a user-friendly machine-selection dialog where you can choose:
- The type of machine (CPU/GPU specs)
- Storage size
- The expected costs of the resources
File transfer is free, and pricing details within the interface make it easy to budget for your tasks. For initial testing, SAMSON recommends using a machine with 4 virtual CPUs (vCPUs) and no GPU, as it is more cost-effective.
Step 3: Monitor and Manage Jobs with the Job Manager
Once submitted, SAMSON’s Job manager becomes your go-to tool for monitoring the status and progress of your jobs. Whether initializing, running, or completed, the manager provides real-time updates and critical information, such as completion estimates and resource consumption.
You can access the Job manager at any time via the interface or the shortcut Ctrl/Cmd + 6. This tool also allows you to pause or cancel running jobs and even restart paused jobs later if needed:
Step 4: Download and Import Results
Once a job completes, an email notification and an in-app News message will alert you. The results are stored in the cloud, and you can download them fully or selectively through the Job manager. Importing these results into SAMSON is simple: copy the folder path, head back to the respective GROMACS Wizard tab, and use the Import (*) results option. Visualization adjustments and trajectory analysis are just a few clicks away.
Optimizing Cloud Usage
While the cloud expands computational freedom, it is important to manage resources wisely. Delete completed jobs from your cloud storage once you are done with analysis, as storage costs may eventually be deducted from your computing credits. Using the Job manager, you can quickly remove unnecessary jobs.
Conclusion
The GROMACS Wizard in SAMSON makes it easier than ever to scale computations to the cloud. Whether you’re constrained by local hardware or seeking optimized workflows, this tool equips you with a flexible solution to perform equilibration and production simulations seamlessly.
To delve into more detailed steps or explore specific features, visit the official documentation page.
SAMSON and all SAMSON Extensions are free for non-commercial use. You can get them at https://www.samson-connect.net.