> "speed would only be acceptable if you batch up " -- I understand what you > are talking about here (without batching-up, HBase simply become very > sluggish). Can you comment if Cassandra needs a batch-up mode? (I recall > Twitter said they just keep putting results into Cassandra for its analytics > application) >
Sean, I guess you are talking about rainbird? If so then check slide 26: http://www.slideshare.net/kevinweil/rainbird-realtime-analytics-at-twitter-strata-2011 In short, they batch 1 minute worth of data before inserting it. Like Ted said, without batching you have a server round-trip for every row update, and the speed of light cannot be improved so...
