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Table 4 Total time in seconds prototype SCOPE-MR (without monitoring and reconfiguration) and prototype SCOPE (with monitoring and reconfiguration) takes to execute the data size of 100 K entries. The SCOPE prototype built on top of SCOPE introduces an additional average relative performance overhead of 3%, 4%, 15% on write, write with replication, and read operations

From: SCOPE: self-adaptive and policy-based data management middleware for federated clouds

Application prototype Write Write replication Read
SCOPE-MR 314 1051 435
SCOPE 322 1089 501
Monitoring overhead 3% 4% 15%