2.1 Decide which version to install

If you are installing the package on a machine that has only one CPU you should install the serial version. For some platforms we have no serial version available. In such cases you can just install any parallel version.

If you are installing the package on a machine with more than one CPU or on a multi-core machine, or if you are installing ADF on a cluster, you should install a parallel version. Please note that the Hyperthreading technique available in some processors does not improve ADF performance. Thus, even though a hyperthreaded processor is seen by the system as two logical processors, it should be considered as one.

For most systems, only an MPI version is provided but for some systems there is also a serial version. If there is no serial version available for your system then you can run an MPI version in serial mode.

Note about PVM. Even though PVM is still supported by the ADF source code, SCM does not distribute any PVM versions of ADF. Thus, only those users who compile ADF themselves have access to the PVM version.