The Internet Archive uses Redis for a lot of things. We use it as a read-only cache for all of the metadata about our "items" (books/videos/etc). We use it to s

The Internet Archive uses Redis for a lot of things. We use it as a read-only cache for all of the metadata about our "items" (books/videos/etc). We use it to store information about "save page now" pages in the Wayback Machine, so that you can immediately replay a saved page. (The main Wayback index is 60 TBytes; not in Redis today, maybe someday.)