Consider a system with six processes P1, P2, P3, P4, P5, and P6, and five resources R1, R2, R3, R4, and R5. Each process can request and hold multiple instances of a resource, and each resource can be held by only one process at a time. The following table shows the maximum resource needs and current resource allocation of each process: Process Max Needs Allocation P1 R1:2 R1:1 P2 P3 P4 P5 R2:1 R1:1 R4:2 R3:3 R5:1 R2:1 R4:1 R4:1 R3:2 P6 Draw a Resource Allocation Graph (RAG) to represent the current state of the system. Use the RAG to determine whether there are any deadlock cycles present in the system. If there are, identify the processes and resources involved in each deadlock cycle. R5:1 How many deadlock cycles are present in the system? If there are any deadlock cycles, identify the processes and resources involved in each cycle.

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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Consider a system with six processes P1, P2, P3, P4, P5, and P6, and five resources R1, R2, R3, R4, and R5. Each process
can request and hold multiple instances of a resource, and each resource can be held by only one process at a time.
The following table shows the maximum resource needs and current resource allocation of each process:
Process Max Needs Allocation
P1
R1:2
R1:1
P2
P3
P4
P5
P6
R2:1
R1:1
R4:2
R3:3
R5:1
R2:1
R4:1
R4:1
R3:2
R5:1
Draw a Resource Allocation Graph (RAG) to represent the current state of the system. Use the RAG to determine whether
there are any deadlock cycles present in the system. If there are, identify the processes and resources involved in each
deadlock cycle.
How many deadlock cycles are present in the system? If there are any deadlock cycles, identify the processes and
resources involved in each cycle.
Transcribed Image Text:Consider a system with six processes P1, P2, P3, P4, P5, and P6, and five resources R1, R2, R3, R4, and R5. Each process can request and hold multiple instances of a resource, and each resource can be held by only one process at a time. The following table shows the maximum resource needs and current resource allocation of each process: Process Max Needs Allocation P1 R1:2 R1:1 P2 P3 P4 P5 P6 R2:1 R1:1 R4:2 R3:3 R5:1 R2:1 R4:1 R4:1 R3:2 R5:1 Draw a Resource Allocation Graph (RAG) to represent the current state of the system. Use the RAG to determine whether there are any deadlock cycles present in the system. If there are, identify the processes and resources involved in each deadlock cycle. How many deadlock cycles are present in the system? If there are any deadlock cycles, identify the processes and resources involved in each cycle.
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