Example: P₁ Request (1,0,2)• First, we Check that Request < Available (that is, (1,0,2) ≤ (3,3,2)→> true)Allocation NeedAvailableABCABCABCAvailableAllocation MaxABC ABCABCP 010753332Ро010743230P₁ 200P₂302P 211P₁ 002322902222P₁ 302433P₂302600P3211011P₁ 002431. Second, We must determine whether this new system state is safe. So, we execute oursafety algorithm and find that the sequence satisfies the safetyrequirement.Can request for (3,3,0) by P4 be granted?no, (2,3,0) < (3,3,0)020

Answered: Image /qna-images/answer/c1b4a22e-0eec-45f9-8ed9-17e1ab23d8da.jpg

Example: P Request (1,0,2) • First, we Check that Request < Available (that is, (1,0,2) ≤ (3,3,2)→> true) Allocation Need Available Allocation ABC ABC ABC Max Available ABC ABC ABC Po 010 753 332 Po 010 743 230 322 P₁ 200 P₂302 P 211 902 P₁ 302 222 P 002 433 P₂ 302 600 P3 211 011 P4 002 431 • Second, We must determine whether this new system state is safe. So, we execute our safety algorithm and find that the sequence satisfies the safety requirement. • Can request for (3,3,0) by P4 be granted? no, (2,3,0) < (3,3,0) 020

Example: P Request (1,0,2) • First, we Check that Request < Available (that is, (1,0,2) ≤ (3,3,2)→> true) Allocation Need Available Allocation ABC ABC ABC Max Available ABC ABC ABC Po 010 753 332 Po 010 743 230 322 P₁ 200 P₂302 P 211 902 P₁ 302 222 P 002 433 P₂ 302 600 P3 211 011 P4 002 431 • Second, We must determine whether this new system state is safe. So, we execute our safety algorithm and find that the sequence satisfies the safety requirement. • Can request for (3,3,0) by P4 be granted? no, (2,3,0) < (3,3,0) 020

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

Problem 1PE

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Concept explainers

Hash Table

A hash table also called a hash map, is a data structure that maps key-value pairs. The hash table can be used in complex systems to provide fast access and compact storage. A hash table is a structure that stores data in an abstract data type kind of associative array. It keeps data in an array format, with a distinct index value for every data value. If the index of the required data is known, then the data can be accessed very easily.

Question

Example: P₁ Request (1,0,2)
• First, we Check that Request < Available (that is, (1,0,2) ≤ (3,3,2)→> true)
Allocation Need
Available
ABC
ABC
ABC
Available
Allocation Max
ABC ABC
ABC
P 010
753
332
Ро
010
743
230
P₁ 200
P₂302
P 211
P₁ 002
322
902
222
P₁ 302
433
P₂
302
600
P3
211
011
P₁ 002
431
. Second, We must determine whether this new system state is safe. So, we execute our
safety algorithm and find that the sequence <P1, P3, P4, PO, P2> satisfies the safety
requirement.
Can request for (3,3,0) by P4 be granted?
no, (2,3,0) < (3,3,0)
020

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