I was watching some videos from the C* summit 2013 and I recall many people saying that if you can some up with a design where you don't preform updates on rows, that would make things easier (I believe it was because there would be less compaction).
When building an Analytics (time series) app on top of C*, based on Twitters Rainbird design ( http://www.slideshare.net/kevinweil/rainbird-realtime-analytics-at-twitter-strata-2011), this means there will be lots and lots of counters. With lots of counters (updates), admin wise, what are some things to consider? Could old tomestombed data somehow come back to life? I forget what scenerio brings about old data (kinda scary!).
