Hi, I'm trying to persist the contents of my app. objects to Cassandra. The objects in here are loosely modeled on key value (KV) stores. If the KV store is extended from HashMap and mapped to a ColumnFamily with put and get ops mapping to insert/read from Cassandra. Then my questions are:
a) What operations in Cassandra can be considered to be atomic - reads? Is reading (of rows by concurrent threads/clients) atomic across one Column Family or across multiple (e.g. two) Column Families? assume get_range_slices ..with ConsistencyLevel.QUORUM b) Consistency of write/update/delete ops across CF's by concurrent clients/threads? In order to make them consistent or atomic, would insert(..) with ConsistencyLevel.QUORUM be a good idea. Or would you recommend external components like ZooKeeper or Hazelcast etc to coordinate such operations? Thanks!
