In VDT 2.0.0, we use Globus 4.0.8 as a base. However, we modify Globus with several patches. Below we describe a few particularly notable patches.
Complete list of Globus 4.0.8 patches in VDT 2.0.0
One of the patches will tell the jobmanagers to set $GLOBUS_LOCATION
for the jobs to a new location: $OSG_GRID/globus. This is only done
when $OSG_GRID is defined, so it will only affect Open Science Grid (OSG)
installations, unless you happen to define $OSG_GRID.
The reason for this is because we want jobs to know $GLOBUS_LOCATION,
but it is often in a different location on the worker nodes. In an OSG
site, this location is defined by $OSG_GRID, so we set
$GLOBUS_LOCATION as a convenience.
Note that $OSG_GRID is set by OSG using the
Job-Environment
modification.
Some of the patches enable a simple gatekeeper accounting mechanism that works with pre-web services GRAM (a.k.a GRAM 2). Read more details