Recently, Lennart Poettering announced a new tool called casync for efficiently distributing filesystem and disk images. Deployment of virtual machines or containers often requires such an image to be distributed for them. These images typically contain most or all of an entire operating system and its requisite data files; they can be quite large. The images also often need updates, which can take up considerable bandwidth depending on how efficient the update mechanism is. Poettering developed casync as an efficient tool for distributing such filesystem images, as well as for their updates. 查看全文>>