ganga.GangaCore.Lib.Executable.Executable module

Executable application – running arbitrary programs.

When you want to run on a worker node an exact copy of your script you should specify it as a File object. Ganga will then ship it in a sandbox:

app.exe = File(‘/path/to/my/script’)

When you want to execute a command on the worker node you should specify it as a string. Ganga will call the command with its full path on the worker node:

app.exe = ‘/bin/date’

A command string may be either an absolute path (‘/bin/date’) or a command name (‘echo’). Relative paths (‘a/b’) or directory paths (‘/a/b/’) are not allowed because they have no meaning on the worker node where the job executes.

The arguments may be specified in the following way:

app.args = [‘-v’,File(‘/some/input.dat’)]

This will yield the following shell command: executable -v input.dat The input.dat will be automatically added to the input sandbox.

If only one argument is specified the the following abbreviation may be used:

apps.args = ‘-v’

ganga.GangaCore.Lib.Executable.Executable.const_lock

This is a context manager which acquires the const write lock on the object’s root object.

This lock acquires exclusive access over an object tree to prevent it from changing. Reading schema attributes on the object is still allowed but changing them is not. Only one thread can hold this lock at once.