My talk from http://wdcnz.com 2012.
I took a brief look at Cassandra and then stepped through building a twitter clone. Very rough code is at https://github.com/amorton/wdcnz-2012-site
36. Data Model so far.
Row Key: Column Column Column
(Incomplete.)
37. Data Model.
Keyspace
Column Family Column Family Column Family
Column Column Column
Row Key: Column Column Column
Column Column Column
(Excludes Super Columns.)
38. Data Model...
Keyspace
Column Family
Column: name, value, timestamp
Row Key: Column: name, value, timestamp
Column: name, value, timestamp
(Also TTL and Tombstone Columns.)