If you’re a molecular modeler, you’ve likely faced the challenge of running computationally heavy simulations on a local machine. Whether it’s due to limited hardware capabilities or the time cost of running intensive computations, this obstacle is a common one. The GROMACS Wizard in SAMSON offers a solution: cloud-based computation. This blog post will guide you through how to perform GROMACS equilibration and production molecular dynamics simulations in the cloud, removing the strain on your local resources.
Why Choose Cloud Computing for GROMACS?
Running molecular simulations often involves highly complex systems that demand significant computational power. Depending on your hardware setup, running such simulations locally for hundreds of thousands of steps might be impractical or even unfeasible. By leveraging cloud computing with SAMSON’s GROMACS Wizard, you can:
- Access powerful external hardware tailored to your needs.
- Monitor and manage your jobs remotely.
- Minimize local hardware limitations and free up resources for other tasks.
With SAMSON, the process is seamless, requiring just a few setup steps.
Step-by-Step: Setting Up a Cloud Job
1. Check the System Locally
Before launching a simulation in the cloud, it’s recommended to test it locally for a few tens or hundreds of steps. This preliminary check helps uncover structural or parameter issues that could derail the cloud job. If your system is too large for local testing, you can use the “Generate inputs” option to validate your setup partially.
2. Create Your Cloud Job
To create a job for cloud computation, start by clicking the Equilibrate in the cloud / Simulate in the cloud button in the GROMACS Wizard. You’ll then proceed to configure your job in the machine-selection dialog:
- Select the machine type (e.g., number of CPUs or GPUs).
- Set the required storage size.
- Review the expected costs and performance indicators.
For tutorial purposes, opting for a machine with 4 virtual CPUs and no GPUs is a cost-effective way to test your workflow.
3. Confirm Your Job
Before submission, a security dialog will ask you to review the job details including the estimated cost in computing credits. You can also rename the job and add descriptive notes for future reference. Once confirmed, the job will initialize automatically in SAMSON’s Job Manager, uploading simulation files to cloud storage for processing.
4. Monitor and Manage Your Job
In the Job Manager, you can track the progress of your cloud job. Simply check the “Running” status and click on job details for updates. As the simulation runs, SAMSON provides estimated completion times and event logs, letting you stay informed without needing to keep the app open on your machine.
Worried about job interruptions? You can also pause or cancel running jobs and restart them later to optimize your computations.
Downloading and Using Results
Once your job is complete, you’ll receive notifications both via email and within SAMSON. Results can be accessed through the Job Manager, allowing you to:
- Download individual files or all results with dedicated options.
- Import the results directly into the GROMACS Wizard for trajectory analysis and plotting.
Remember, downloading files from the cloud is always free. By clearing jobs and their files from the cloud afterward, you can reduce future storage costs.
Conclusion
By enabling cloud-based computations, SAMSON’s GROMACS Wizard makes molecular simulations more accessible and flexible. Whether you’re dealing with large systems or restricted by local hardware, this workflow provides a streamlined solution for tackling demanding simulations.
To learn more, visit the original documentation page: https://documentation.samson-connect.net/tutorials/gromacs-wizard/cloud/.
SAMSON and all SAMSON Extensions are free for non-commercial use. Download SAMSON at https://www.samson-connect.net.