4(a) The question for 4(a) is in the 1st image(7.3) - Filter ProcessesHint: Define an array of channels value[n] (int), and a set of filter processes Filter[i = 0 to n-1]. Each process Filter[i] (where 0 <= i <= n-2) receives a stream of integers through channel value[i], keeps the smallest, and sends out all other integers through channel value[i+1]. The last process Filter[n-1] receives only one integer through channel value[n-1], so it does not need to send out any integer. 4(b) Asynchronous message passing , Reader- Writer problem in 2nd image Readers/Writers Problem. Based on the monitor RW_Controller defined in Figure 5.5, Andrews' book,page 216, develop a server process for read/write control using asynchronous message passing. Supposewe have k reader processes and n-k writer processes, which are defined as follows:type op kind = enum (READ_REQ, READ_DONE, WRITE_REQ, WRITE_DONE);chan request (int client ID, op kind kind);chan reply [n] ();process Reader [i = 0 to k-1] {while (true) {send request (i, READ_REQ) ;receive reply[i] ();reading ...send request (i, READ_DONE);receive reply [i] ();process Writer [i = k to n-1] {while (true) {}Page 1 of 2send request (i, WRITE_REQ) ;receive reply[i] ();writing ...send request (i, WRITE_DONE);receive reply[i] (); 7.3 It is possible to sort an array of n values using a pipeline of n filter processes.The first process inputs all the values one at a time, keeps the minimum, andpasses the others on to the next process. Each filter does the same thing: itreceives a stream of values from the previous process, keeps the smallest, andChapter 7 Message Passingpasses the others to the next process. Assume each process has local storage foronly two values--the next input value and the minimum it has seen so far.(a) Develop code for the filter processes. Declare the channels and use asyn-chronous message passing.

Given: It is possible to sort an array of n values using a pipeline of a filter processes. The first…

Answered: It is possible to sort an array of n…

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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4(a) The question for 4(a) is in the 1st image(7.3) - Filter Processes
Hint: Define an array of channels value[n] (int), and a set of filter processes Filter[i = 0 to n-1]. Each process Filter[i] (where 0 <= i <= n-2) receives a stream of integers through channel value[i], keeps the smallest, and sends out all other integers through channel value[i+1]. The last process Filter[n-1] receives only one integer through channel value[n-1], so it does not need to send out any integer.

4(b) Asynchronous message passing , Reader- Writer problem in 2nd image

Readers/Writers Problem. Based on the monitor RW_Controller defined in Figure 5.5, Andrews' book,
page 216, develop a server process for read/write control using asynchronous message passing. Suppose
we have k reader processes and n-k writer processes, which are defined as follows:
type op kind = enum (READ_REQ, READ_DONE, WRITE_REQ, WRITE_DONE);
chan request (int client ID, op kind kind);
chan reply [n] ();
process Reader [i = 0 to k-1] {
while (true) {
send request (i, READ_REQ) ;
receive reply[i] ();
reading ...
send request (i, READ_DONE);
receive reply [i] ();
process Writer [i = k to n-1] {
while (true) {
}
Page 1 of 2
send request (i, WRITE_REQ) ;
receive reply[i] ();
writing ...
send request (i, WRITE_DONE);
receive reply[i] ();

7.3 It is possible to sort an array of n values using a pipeline of n filter processes.
The first process inputs all the values one at a time, keeps the minimum, and
passes the others on to the next process. Each filter does the same thing: it
receives a stream of values from the previous process, keeps the smallest, and
Chapter 7 Message Passing
passes the others to the next process. Assume each process has local storage for
only two values--the next input value and the minimum it has seen so far.
(a) Develop code for the filter processes. Declare the channels and use asyn-
chronous message passing.

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