Directory Structure

A fresh checkout creates a directory Cactus with the following subdirectories:

CVS

the CVS bookkeeping directory, present in every subdirectory

doc

Cactus documentation

lib

contains libraries

src

contains the source code for Cactus

arrangements

contains the Cactus arrangements. The arrangements (the actual ``physics'') are not supplied by just checking out Cactus. If the arrangements you want to use are standard Cactus arrangements, or reside on our CVS repository (cvs.cactuscode.org), they can be checked out in similar way to the flesh.

When Cactus is first compiled, it creates a new directory Cactus/configs, which will contain all the source code, object files and libraries created during the build process. Disk space may be a problem on supercomputers where home directories are small.

A workaround is to first create a configs directory on scratch space, say scratch/cactus_configs/ (where scratch/ is your scratch directory), and then either

• set the environment variable CACTUS_CONFIGS_DIR to point to this directory

or

• soft link this directory (ln -s scratch/cactus_configs Cactus/configs/) to the Cactus directory, if your filesystem supports soft links.

Configurations are described in detail in Section A2.1.