These files are all empty, but the name of each file conveys information about the status of the calculation, and new files are created, and old ones are deleted, as certain milestones in the calculation are hit. At the beginning of the calculation, the PENDING flag will be the only file present, which indicates the calculation is currently in the queue, and awaiting resources. Once the calculation reaches the top of the queue and execution begins, the PENDING flag will be deleted and replaced with the STARTED flag. Once the calculation is complete, this in turn will be replaced with the SUCCESS flag, and the POST phase will begin, and so on. In this manner, it is possible to monitor the entire process of the calculation from the file-explorer, without using any external tools. The currently supported file flags, and their meanings, are detailed in Table