Q Q Ueuing Ueuing a Analysis Nalysis
نویسنده
چکیده
WHY QUEUING ANALYSIS? ......................................................................................2 QUEUING MODELS......................................................................................................3 The Single-Server Queue.....................................................................................3 Queue Parameters ....................................................................................4 The Multiserver Queue ........................................................................................5 Basic Queuing Relationships ...............................................................................5 Assumptions.........................................................................................................5 SINGLE-SERVER QUEUES..........................................................................................6 MULTISERVER QUEUES.............................................................................................7 NETWORKS OF QUEUES.............................................................................................7 Partitioning and Merging of Traffic Streams.......................................................7 Queues in Tandem ...............................................................................................8 Jackson's Theorem ...............................................................................................8 Application to a Packet-Switching Network........................................................8 EXAMPLES.....................................................................................................................10 Database Server....................................................................................................10 Tightly-Coupled Multiprocessor..........................................................................11 Single-Server Approach...........................................................................11 Multiserver Approach ..............................................................................11 Calculating Percentiles.........................................................................................12 OTHER QUEUING MODELS........................................................................................13 RECOMMENDED READING .......................................................................................13 ANNEX A JUST ENOUGH PROBABILITY AND STATISTICS ..............................14 Measures of Probability .......................................................................................15 The Exponential and Poisson Distributions.........................................................15 Sampling ..............................................................................................................17
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