Systems and methods are disclosed for selecting a query plan in a database by monitoring network state information and flow information; and selecting an adaptive plan for execution with a query manager that receives the network state information and flow information, including: receiving a query, parsing the query, generating and optimizing a global query plan; dividing the global query plan into local plans; sending the local plans to corresponding data store sites for execution with separate threads; and orchestrating data flows among the data store sites and forwarding a final result to a user.
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