Editing Cache replacement policies (section)

==== {{anchor|Time aware least recently used (TLRU)}}Time-aware, least-recently used ====
Time-aware, least-recently-used (TLRU)<ref>{{cite book|author=Bilal, Muhammad|title=16th International Conference on Advanced Communication Technology |chapter=Time Aware Least Recent Used (TLRU) cache management policy in ICN |year=2014 |display-authors=etal|pages=528–532|bibcode=2018arXiv180100390B|arxiv=1801.00390|doi=10.1109/ICACT.2014.6779016|isbn=978-89-968650-3-2|s2cid=830503}}</ref> is a variant of LRU designed for when the contents of a cache have a valid lifetime. The algorithm is suitable for network cache applications such as [[information-centric networking]] (ICN), [[content delivery network]]s (CDNs) and distributed networks in general. TLRU introduces a term: TTU (time to use), a timestamp of content (or a page) which stipulates the usability time for the content based on its locality and the content publisher. TTU provides more control to a local administrator in regulating network storage.

When content subject to TLRU arrives, a cache [[Node (computer science)|node]] calculates the local TTU based on the TTU assigned by the content publisher. The local TTU value is calculated with a locally-defined function. When the local TTU value is calculated, content replacement is performed on a subset of the total content of the cache node. TLRU ensures that less-popular and short-lived content is replaced with incoming content.