Available Toolchains and Toolchain Compatibility

Note: This page is for using new queueing system on the Sapelo2 cluster. This page is still under development as of June 22-26, 2020.

If you are current Sapelo2 users, please come back later.

We use EasyBuild to build most of the software modules on the Sapelo2 cluster. Easybuild is a software build and installation framework that allows us to manage scientific software on High Performance Computing (HPC) systems in an efficient way. EasyBuild employs so-called compiler toolchains or, simply toolchains for short, in handling the build and installation processes. A typical toolchain consists of one or more compilers, usually put together with some libraries for specific functionality, e.g., for using an MPI stack for distributed computing, or which provide optimized routines for commonly used math operations, e.g., the well-known BLAS/LAPACK APIs for linear algebra routines. For detailed info about EasyBuild and its toolchains, please refer to EasyBuild and toolchains

Avaliable toolchains on cluster

• Common compiler toolchains on the Sapelo2 cluster:

Name	Version	Compiler(s)	MPI library	Linear algebra library	FFT
foss	2019b	GCC/8.3.0	OpenMPI/3.1.4	OpenBLAS/0.3.7, ScaLAPACK/2.0.2	FFT/3.3.8
gompi	2019b	GCC/8.3.0	OpenMPI/3.1.4
GCC	6.4.0-2.28, 8.3.0, 9.2.0	GCC
GCCcore	6.4.0, 8.3.0, 9.2.0	GCCcore

• Compiler toolchains with GPU/CUDA support on the Sapelo2 cluster:

Name	Version	Compiler(s)	MPI library	Linear algebra library	FFT
fosscuda	2019b	GCC/8.3.0, CUDA/10.1.243	OpenMPI/3.1.4	OpenBLAS/0.3.7, ScaLAPACK/2.0.2	FFT/3.3.8
gompic	2019b	GCC/8.3.0, CUDA/10.1.243	OpenMPI/3.1.4
gcccuda	2019b	GCC/8.3.0, CUDA/10.1.243

For a complete list of EasyBuild toolchains, please refer to List_of_known_toolchains

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Toolchain compatibility

On Sapelo2, software modules built by EasyBuild generally have names in a format like Name/Version-Toolchain. When you load more than one software module built by EasyBuild, please make sure that they are built with the same or compatible toolchains. You can check this by looking into software modules' names. If there are any incompatible toolchains involved in loading modules, it will end up with failing dependencies or Lmod errors, like this:

Lmod has detected the following error:  
These module(s) exist but cannot be loaded as requested

Toolchains belonging to GCC/8.3.0 family are all compatible with each other. They are give as below (<=> means compatible):

GCCcore-8.3.0 <=> GCC-8.3.0 <=> gompi-2019b <=> gompic-2019b <=> foss-2019b

gcccuda/2019b <=> gompic-2019b <=> fosscuda-2019b

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