DFS Departement
VOLAC main functionalities

VOLAC main functionalities

VOLAC sends files to the OLAC queue, by making soft links to the data into a given directory read by VcsOlac ($DHS_DATA).

The $DHS_DATA environment variable is set by default to the VCS standard environement (same as VLTROOT, VLTDATA, etc.).

VOLAC is started automatically with the RTAP environment of OS (Observation Software). Prior to starting VOLAC (starting RTAP), $DHS_DATA must be set.

Upon reception of a new data event, VOLAC queues the file for archiving, i.e. creates a symbolic link in the $DHS_DATA directory, which has the same name as the data file.

Current version of VOLAC assumes that OS has set the file permission to -r--r--r-- ; if not, the archiving will fail. Next version of VOLAC will check, and if necessary, update the permissions.

VOLAC logs following events on the standard operations logs:
- link to file successfully created or failed
- start and termination of VOLAC
- error messages

All VOLAC tasks on a given WS must use the same $DHS_DATA directory.

DFS Departement VOLAC main functionalities

VOLAC main functionalities

DFS Departement
VOLAC main functionalities