SCHEDULE is possible only when precedence GRAPH doesn’t contain cycle. If precedence graph contains a cycle, it means schedule is not conflict serializable.Breadth first search and Depth first search of a graph are possible even if graph contains cycle.Topological sort in a graph will not work if graph contains a cycle.Consider a directed ACYCLIC graph:Here Two orders possible: V2, V3, V1, V4, V5, V6 OR V3, V2, V1, V4, V5, V6.In case of ascending order of transaction indices, two non-conflicting schedules can occur simultaneously.

"> SCHEDULE is possible only when precedence GRAPH doesn’t contain cycle. If precedence graph contains a cycle, it means schedule is not conflict serializable.Breadth first search and Depth first search of a graph are possible even if graph contains cycle.Topological sort in a graph will not work if graph contains a cycle.Consider a directed ACYCLIC graph:Here Two orders possible: V2, V3, V1, V4, V5, V6 OR V3, V2, V1, V4, V5, V6.In case of ascending order of transaction indices, two non-conflicting schedules can occur simultaneously.

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Suppose a database schedule S involves transactions T1, …,Tn. Construct the precedence graph of S with vertices representing the transactions and edges representing the conflicts. If S is serializable, which one of the following orderings of the vertices of the precedence graph is guaranteed to yield a serial schedule?

General Knowledge General Awareness in General Knowledge 7 months ago

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Serial SCHEDULE is possible only when precedence GRAPH doesn’t contain cycle. If precedence graph contains a cycle, it means schedule is not conflict serializable.Breadth first search and Depth first search of a graph are possible even if graph contains cycle.Topological sort in a graph will not work if graph contains a cycle.Consider a directed ACYCLIC graph:Here Two orders possible: V2, V3, V1, V4, V5, V6 OR V3, V2, V1, V4, V5, V6.In case of ascending order of transaction indices, two non-conflicting schedules can occur simultaneously.

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Posted on 09 Dec 2024, this text provides information on General Knowledge related to General Awareness in General Knowledge. Please note that while accuracy is prioritized, the data presented might not be entirely correct or up-to-date. This information is offered for general knowledge and informational purposes only, and should not be considered as a substitute for professional advice.

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