Method and apparatus for archiving media using a log

摘要

Method and apparatus for archiving media using a log are described. In one embodiment, the method comprises accepting an original media; updating a first log to include an indication that specifies a date of when the original media was received; converting the original media into a bitmap, the bitmap being in a format different than that of the media; updating a second log with an entry that specifies a relationship between the original media and the bitmap indicating that they are related, wherein the entry includes an identifier corresponding to the entry and an identifier corresponding to the media.

主权项

1. A method comprising:
accepting an original media; updating an entry in a first log to include an indication that specifies a date of when the original media was received; converting the original media into a bitmap, the bitmap being in a format different than that of the original media; generating, with a processor, identifiers for the original media, the bitmap, and a time when the original media was converted into the bitmap, wherein the identifier for the original media is based at least in part on a rolling hash function applied to a concatenation of a first string of data representing at least a portion of content in the original media and a second string of data representing at least one prior log entry from a second log, the identifier for the bitmap is based at least in part on the rolling hash function applied to a concatenation of a third string of data representing content in the bitmap and a fourth string of data representing at least one prior log entry from the second log, and the identifier for the time when the original media was converted into the bitmap is based on a hash function applied to a value indicative of the time when the original media was converted into the bitmap; and updating the entry in the first log to specify a relationship between the original media and the bitmap indicating that the bitmap was generated from the original media and to specify a date when the bitmap was generated from the original media, wherein the updated entry includes the identifier corresponding to the bitmap, the identifier corresponding to the original media, and the identifier corresponding to the time when the original media was converted into the bitmap, wherein the entry in the first log entangles the first log with the second log.