j. Single process space in a cluster system Question 4 Explain the following terms on cluster job management systems a. Serial jobs versus parallel jobs b. Batch jobs versus interactive jobs c. Cluster jobs versus foreign (local) jobs d. Dedicated mode, space-sharing mode and timesharing mode c. Independent scheduling versus gang scheduling Questions Compute the availability (uptime, and the unavailability downtime) of any system in terms of hours/minutes per day and hours/days per year according to availability values 0,88,0.99 and 0.998 Question 6 Equipment is operational for 7899 hours and requires 890 hours to repair. a. What is the system availability? b. What is the system unavailability? c. What is the outage due to equipment in hours per year? Question 7 If we are using equipment which has a mean time to failure (MTTF) of $3.5 years and mean time to repair (MTTR) of 2 hours. a. What is the system availability? b. What is the system unavailability! c. What is the outage due to equipment in hours per year? Parallel and Distributed Computing Question 8 Consider a cluster that has little availability support. Upon a node failure, the following sequence of events takes place: 1. The entire system is shut down and powered off. 2. The faulty node is replaced if the failure is in hardware 3. The system is powered on and rebooted. 4. The user application is reloaded and rerun from the start Assume one of the cluster nodes fails every 100 hours. Other parts of the cluster never failSteps 1 through 3 take four hours. On average, the mean time for step 4 is three hours. What is the availability of the cluster? What is the yearly failure cost of each one-hour downtime costs $92,500