How much space do I need for dirvish?
A reasonable rotation program should need about one and half to three times the space of the original filesystem. This is very dependent on the rate of change for a given directory tree and the number and age-range of images in the rotation. Consideration should be given to the nature and probable change rates of a given backup area and the value of older data. Project areas and home directories may have relatively low rates of change but are subject to sudden spikes and their data is important enough to retain for extended periods. Conversely /var has a high change rate but the data is really only valuable for one or two days. So a vault for /home might want thrice the space of the production area to hold images ranging from one to three months or longer while /var may only need fifty percent more space in its vault and be expired after 2 or three days. —————————————————— back to Dirvish FAQ.
