/**
* Get free disk space of a drive where ingest data are written to That drive is being monitored
* by IngestMonitor thread when ingest is running. Use this method to get amount of free disk
* space anytime.
*
* @return amount of disk space, -1 if unknown
*/
long getFreeDiskSpace() {
if (ingestMonitor != null) {
return ingestMonitor.getFreeSpace();
} else {
return -1;
}
}
