No SQL
Couch DB: Data Model is document. Where document is set of key value pairs. It uses optimistic lock mechanism for update of the records
memcached: key- value pair is the data model
Dyanmo: key- value is pair the data model
Big Table: Data Model is ext
Couch DB: Data Model is document. Where document is set of key value pairs. It uses optimistic lock mechanism for update of the records
memcached: key- value pair is the data model
Dyanmo: key- value is pair the data model
Big Table: Data Model is ext
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