Lecture 3
From Systems to Descriptive Models

Homework 1 Solution

• On board

Topics

• Modeling
• Graphical Notation for Queues
• Example Open workload
• Multiclass DB example
• Open v. closed
• Example Closed workload
• Example Mixed workload
• SLA
• Types of resources
• Admission Control (Blocking)
• DB server w/software contention
• Effect of Software Contention
• DB server with lock contention
• Simultaneous Resource Possession Time Axes
• Class switching
• Queueing Disciplines:
  • FCFS
  • Priority Queueing
  • Round-Robin
  • Processor Sharing
  • LCFS-PR
  • SJF