Supported Machines

E3SM is supported for users of the following platforms

• Perlmutter at NERSC

• Frontier at OLCF

• Polaris at ALCF

Software prerequisites

The following are the external system and software requirements for installing and running E3SM.  (Started from CESM1.2 pre reqs.)

• UNIX-style operating system such as CNL, AIX and Linux

• csh, bash shells

• A recent version of the Perl scripting language (5.16+), plus the following modules:

  • XML::SAX  (from  LibXML module)

  • XML::SAX::Exception ( from the LibXML module)

  • Switch (Switch.pm)

• subversion client version 1.4.2 or greater (for downloading CESM-originating data files)

• Git version 2.0 or newer (for getting source code)

• Fortran (2003 support required) and C/C++ compilers.

• MPI (although E3SM does not absolutely require it for running on one processor)

• One or both of NetCDF 4.6.1 or newer and pnetcdf, 1.6.1 or newer. (E3SM can use PnetCDF if NetCDF is not installed).

• CMake 3.16 or newer is required 

• Python 3.10 or newer is required for E3SM-specific build/test scripts.

OPTIONAL packages that may be required for some configurations.

• Trilinos 

• LAPACKm or a vendor-supplied equivalent 

• PETSc

Supported Compiler Versions

The second column is the versions E3SM is tested with.  Different machines have different versions.

The third column lists test suites we run for each compiler.