Key Value Storage Systems Key-value storage systems store large numbers(billions or even more)of small (KB-MB)sized records Records are partitioned across multiple machines and Queries are routed by the system to appropriate machine Records are also replicated across multiple machines,to ensure availability even if a machine fails Key-value stores ensure that updates are applied to all replicas,to ensure that their values are consistent Database System Concepts-7th Edition 10.10 @Silberschatz,Korth and SudarshanDatabase System Concepts - 7 10.10 ©Silberschatz, Korth and Sudarshan th Edition Key Value Storage Systems ▪ Key-value storage systems store large numbers (billions or even more) of small (KB-MB) sized records ▪ Records are partitioned across multiple machines and ▪ Queries are routed by the system to appropriate machine ▪ Records are also replicated across multiple machines, to ensure availability even if a machine fails • Key-value stores ensure that updates are applied to all replicas, to ensure that their values are consistent