Query-aware sampling of data streams
First Claim
1. A method of assigning sampling methods to each input stream for arbitrary query sets in a data stream management system, tile method comprising:
- splitting all query nodes in a query directed acyclic graph (DAG) having multiple parent nodes into sets of independent nodes having a single parent;
computing via a processor a grouping set for every node in each set of independent nodes;
reconciling each parent node with each child node in each set of independent nodes;
reconciling between multiple child nodes that share a parent node; and
generating a final grouping set based on the reconciliation between the multiple child nodes that share the parent node for at least one node describing how to sample an input stream for the at least one node.
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Accused Products
Abstract
A system, method and computer-readable medium provide for assigning sampling methods to each input stream for arbitrary query sets in a data stream management system. The method embodiment comprises splitting all query nodes in a query directed acyclic graph (DAG) having multiple parent nodes into sets of independent nodes having a single parent, computing a grouping set for every node in each set of independent nodes, reconciling each parent node with each child node in each set of independent node, reconciling between multiple child nodes that share a parent node and generating a final grouping set for at least one node describing how to sample an input stream for that node.
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Citations
18 Claims
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1. A method of assigning sampling methods to each input stream for arbitrary query sets in a data stream management system, tile method comprising:
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splitting all query nodes in a query directed acyclic graph (DAG) having multiple parent nodes into sets of independent nodes having a single parent; computing via a processor a grouping set for every node in each set of independent nodes; reconciling each parent node with each child node in each set of independent nodes; reconciling between multiple child nodes that share a parent node; and generating a final grouping set based on the reconciliation between the multiple child nodes that share the parent node for at least one node describing how to sample an input stream for the at least one node. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A system for assigning sampling methods to each input stream for arbitrary query sets in a data stream management system, tile system comprising:
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a processor; a module configured to control the processor to split all query nodes in a query directed acyclic graph (DAG) having multiple parent nodes into sets of independent nodes having a single parent; a module configured to control the processor to compute a grouping set for every node in each set of independent nodes; a module configured to control the processor to reconcile each parent node with each child node in each set of independent nodes; a module configured to control the processor to reconcile between multiple child nodes that share a parent node; and a module configured to control the processor to generate a final grouping set based on the reconciliation between the multiple child nodes that share the parent node for at least one node describing how to sample an input stream for the at least one node. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A computer readable storage medium storing instructions for controlling a computing device to assign sampling methods to each input stream for arbitrary query sets in a data stream management system, the instructions comprising:
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splitting all query nodes in a query directed acyclic graph (DAG) having multiple parent nodes into sets of independent nodes having a single parent; computing a grouping set for every node in each set of independent nodes; reconciling each parent node with each child node in each set of independent nodes; reconciling between multiple child nodes that share a parent node; and generating a final grouping set based on the reconciliation between the multiple child nodes that share the parent node for at least one node describing how to sample an input stream for the at least one node. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification