On Mar 19, 2010, at 1:16 PM, Gary wrote: > I am a newbie to bigtable like model and have a question as follows. Take > Digg as an example, I want to find a list users who dug a URL and also want > to find a list of URLs a user dug. How should the data model look like for > the queries to be efficient? If I use the username and the URL for two rows, > when a user digs a URL, I will have to update two rows so I need a > transaction to keep data consistent.
I'll let my former colleagues at Digg chime in here, but I will say you should probably start wrapping your brain around two things that fly quickly out the window with distributed/eventually consisten systems like Cassandra: 1. Normalization 2. Transactions :) --Joe
