On Thu, 2001-11-08 at 10:11, Barrie Slaymaker wrote: > On Thu, Nov 08, 2001 at 08:59:55AM -0800, Bill Moseley wrote: > > Hi, > > > > <verbose> > > I'm looking for a little discussion on selecting a data storage method, and > > I'm posting here because Cache::Cache often is discussed here (along with > > Apache::Session). And people here are smart, of course ;). > > > > Basically, I'm trying to understand when to use Cache::Cache, vs. Berkeley > > DB, and locking issues. > > Even a bit more OT: one thing to watch out for, especially if you plan > on caching a *lot* of data, is that the Cache::* modules did not do > collision detection on MD5 collisions the last time I looked. Forgive > me if that's changed recently. > > The probability is extremely low, but they can and do occur "in the > wild" (I won't bring anyone's name up here :). In other words, it's a > remote possibility that one URI might serve up another's content if the > two hash keys map to the same MD5 value. > > Given an infinite number of web monkeys using Cache::* and an infinite > number of user monkeys clicking on links...
You could switch to SHA1. SHA1 collisions will be much more rare than MD5 collisions. -jwb
