Difference between revisions of "GEOS-Chem required hardware"

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(System requirements for GCHP)
(Memory requirements)
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|Enough memory to run GEOS-Chem
 
|Enough memory to run GEOS-Chem
 
|For the [[GEOS-Chem_horizontal_grids#GMAO_4_x_5_grid|4° x 5°]] "standard" simulation
 
|For the [[GEOS-Chem_horizontal_grids#GMAO_4_x_5_grid|4° x 5°]] "standard" simulation
*At least 8 GB RAM
+
*8-15 GB RAM
 
For the [[GEOS-Chem_horizontal_grids#GMAO_2_x_2.5_grid|2° x 2.5°]] "standard" simulation:
 
For the [[GEOS-Chem_horizontal_grids#GMAO_2_x_2.5_grid|2° x 2.5°]] "standard" simulation:
*About 30 GB RAM
+
*30-40 GB RAM
 +
 
 +
 
 +
Also, our standard GEOS-Chem Classic 1-month full-chemistry benchmark simulations (cf. [[GEOS-Chem_13.0.0#GEOS-Chem_Classic_13.0.0_vs_12.9.0]]) use a little under 14 GB of system memory. This is mostly due to the fact that the benchmark simulations archive the "kitchen sink" —all species concentrations, various aerosol diagnostics, convective fluxes, dry dep fluxes and velocities, J-values, various chemical and meteorological quantities, transport fluxes, wet deposition diagnostics, and emissions diagnostics.  Most users, however, do not need to archive all of these diagnostic quantities.  Therefore a typical GEOS-Chem Classic production simulation would not require as much memory as the benchmark simulation does.
  
 
[[User:Chris Holmes|Chris Holmes]] reported that a 2° x 2.5° "standard" simulation required:
 
[[User:Chris Holmes|Chris Holmes]] reported that a 2° x 2.5° "standard" simulation required:
 
*20 GB memory (MaxRSS)
 
*20 GB memory (MaxRSS)
 
*26 GB virtual memory (MaxVMSize)
 
*26 GB virtual memory (MaxVMSize)
 +
  
 
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Revision as of 15:47, 23 November 2020

Previous | Next | Getting Started with GEOS-Chem

  1. Minimum system requirements for GEOS-Chem
  2. Installing required software
  3. Configuring your computational environment
  4. Downloading source code
  5. Downloading data directories
  6. Creating run directories
  7. Configuring runs
  8. Compiling
  9. Running
  10. Output files
  11. Visualizing and processing output
  12. Coding and debugging
  13. Further reading


System requirements for GEOS-Chem Classic

Computer system requirements

Before you can run GEOS-Chem, you will need to have the following items. Some of these will be already pre-installed on your computer system.

Item Description
EITHER

A Unix-based computer system

You will need a Unix operating system environment in order to run GEOS-Chem. Any flavor of Unix (e.g. CentOS, Ubuntu, Fedora, etc.) should work just fine.
OR

An account on the Amazon Web Services cloud

If your institution has computational resources (e.g. a shared computer cluster with many cores, sufficient disk storage and memory), then you can run GEOS-Chem there. Contact your IT staff for assistance.

If your institution lacks computational resources (or if you need additional computational resources beyond what is available), then you should consider signing up for access to the Amazon Web Services cloud. Using the cloud has the following advantages:

  • You can run GEOS-Chem without having to invest in local hardware and maintenance personnel.
  • You won't have to download any meteorological fields or emissions data. All of the necessary data input for GEOS-Chem will be available on the cloud.
  • You can initialize your computational environment with all of the required software (e.g. compilers, libraries, utilities) that you need for GEOS-Chem.
  • Your GEOS-Chem runs will be 100% reproducible, because you will initialize your computational environment the same way every time.
  • You will avoid GEOS-Chem compilation errors due to library incompatibilities.
  • You will be charged for the computational time that you use, and if you download data off the cloud.

GEOS-Chem 12.0.0 and later versions can be used on the Amazon Web Services cloud computing platform. You can learn more about how to use GEOS-Chem on the cloud by visiting this tutorial (cloud.geos-chem.org).

Memory requirements

If you plan to run GEOS-Chem on a local computer system, please make sure that your system has sufficient memory and disk space:

Item Description
Enough memory to run GEOS-Chem For the 4° x 5° "standard" simulation
  • 8-15 GB RAM

For the 2° x 2.5° "standard" simulation:

  • 30-40 GB RAM


Also, our standard GEOS-Chem Classic 1-month full-chemistry benchmark simulations (cf. GEOS-Chem_13.0.0#GEOS-Chem_Classic_13.0.0_vs_12.9.0) use a little under 14 GB of system memory. This is mostly due to the fact that the benchmark simulations archive the "kitchen sink" —all species concentrations, various aerosol diagnostics, convective fluxes, dry dep fluxes and velocities, J-values, various chemical and meteorological quantities, transport fluxes, wet deposition diagnostics, and emissions diagnostics. Most users, however, do not need to archive all of these diagnostic quantities. Therefore a typical GEOS-Chem Classic production simulation would not require as much memory as the benchmark simulation does.

Chris Holmes reported that a 2° x 2.5° "standard" simulation required:

  • 20 GB memory (MaxRSS)
  • 26 GB virtual memory (MaxVMSize)


Extra memory for special simulations You may want to consider at least 30 GB RAM if you plan on doing any of the following:

Chris Holmes reported that a GEOS-FP 0.25° x 0.3125° NA tropchem nested simulation required:

  • 31 GB memory (MaxRSS)
  • 38 GB virtual memory (MaxVMSize)

--Bob Yantosca (talk) 19:37, 20 November 2020 (UTC)

System requirements for GCHP

Please see our GCHP Hardware and Software Requirements for a list of hardware requirements for GCHP.



Previous | Next | Getting Started with GEOS-Chem