One embodiment is directed to a computer system that includes primary and
secondary storage systems. When a request to store a content unit is
received, it may be determined whether to store the content unit on the
primary storage system or the secondary storage system. In another
embodiment, a computer may store information relating to an action to be
performed in one of the directories of a file system that corresponds to
a period of time. When the period of time to which the directory
corresponds arrives, the action may be performed. In another embodiment,
a content unit stored on a primary storage system may be copied to a
secondary storage system in a computer system. After the content unit has
been copied, the secondary storage system may send a delete request to
the primary storage system to delete the content unit from the primary
storage system.