Hello Kallin. If you use timeUUID the chance to generate two time the same uuid is the following : considering that both client generate the uuid at the *same millisecond*, the chance of generating the same uuid is :
1/1.84467441 × 1019Which is equal to the probability for winning a national lottery for 1e11 days in a row ( for 270 million years). Well if you do have a collision you should play the lottery :). Best regards, Victor Kabdebon http://www.voxnucleus.fr 2011/2/7 Kallin Nagelberg <kallin.nagelb...@gmail.com> > Hey, > > I am developing a session management system using Cassandra and need > to generate unique sessionIDs (cassandra columnfamily keys). Does > anyone know of an elegant/simple way to accomplish this? I am not sure > about using time based uuids on the client as there a chance that > multiple clients could generate the same ID. I've heard suggestions of > using zookeeper as a source for the IDs, but was just hoping that > there might be something simpler for my purposes. > > Thanks, > -Kal >
