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liberstina [14]
3 years ago
14

Explain how chord works. To increasing the fault tolerance in chord, each node maintains a successor list (finger table) instead

of a single successor. Explain the lookup algorithm for finding an object in this structure.
Computers and Technology
1 answer:
andrew11 [14]3 years ago
6 0

Answer:

Chord is a set of rules for a peer-to-peer distributed hash table it collects key-value sets by allotting keys to several computers (known as "nodes"); a node will collect the values for all the keys for which that is reliable. Chord defines how keys are allocated to the nodes, and how a node can determine the value for a distributed key by first locating the node liable for such key.

Explanation:

A chord is a peer-to-peer lookup service. It Resolves the difficulty of establishing a data item in a combination of shared nodes, considering various node arrivals and removals The most crucial operation in most peer-to-peer method is the efficient position of data objects.

It is able of supporting only one operation i.e. given a key, it maps the key on a link.

Algorithm:

Algorithm shows working of the chord:

// x is a node used to find successor of id

x.find_successor(id)

if (id (x; successor])

return successor;

else

// query is being delivered around the circle

entrance successor.find_successor(id);

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Answer:

The full code is added in the comments as per regulations. Continuation of driver.java code from the comments is available on the screenshot

Explanation:

Editable code:

//ListingNode.java

class ListingNode {

   private listpro listing11;

   private ListingNode nextnode;

   public ListingNode(listpro listing11) {

       this.listing11 = listing11;

   }

   public listpro getListing() {

       return listing11;

  }

   public void setListing(listpro listing11) {

       this.listing11 = listing11;

   }

   public ListingNode getnextnode() {

       return nextnode;

   }

   public void setnextnode(ListingNode nextnode) {

       this.nextnode = nextnode;

   }

}

public class Listlinked {

   private ListingNode headnode;

   public Listlinked() {

       headnode = null;

   }

   public void insert(listpro listing11) {

       ListingNode listingNode = new ListingNode(listing11);

       if(headnode == null) {

           headnode = listingNode;

       } else {

           ListingNode tempval = headnode;

           while (tempval.getnextnode() != null) {

               tempval = tempval.getnextnode();

           }

           tempval.setnextnode(listingNode);

       }

   }

   public listpro fetch(String name) {

       ListingNode tempval = headnode;

       while (tempval != null) {

           if(tempval.getListing().getNamedata().equalsIgnoreCase(name)) {

               return tempval.getListing();

           }

           tempval = tempval.getnextnode();

       }

       return null;

   }

   public boolean delete(String name) {

       ListingNode tempval = headnode;

       boolean found = false;

       if(headnode != null) {

          if(headnode.getListing().getNamedata().equalsIgnoreCase(name)) {

               headnode = headnode.getnextnode();

               found = true;

           } else {

               while (tempval.getnextnode() != null) {

                   if (tempval.getnextnode().getListing().getNamedata().equalsIgnoreCase(name)) {

                       found = true;

                       tempval.setnextnode(tempval.getnextnode().getnextnode());

                       break;

                   }

                   tempval = tempval.getnextnode();

               }

           }

       }

       return found;

   }

   public void printAll() {

       ListingNode tempval = headnode;

       while (tempval != null) {

           System.out.println(tempval.getListing().toString());

           tempval = tempval.getnextnode();

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   }

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//listpro.java

import javax.swing.*;

public class listpro {

   private String Name;

   private int ID;

   private float grade_point;

   public listpro(){

   }

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       this.Name = Name;

       this.ID = ID;

       this.grade_point = grade_point;

   }

   public String getNamedata() {

       return Name;

   }

   public void setNamedata(String Name) {

       this.Name = Name;

   }

   public int getID() {

       return ID;

   }

   public void setID(int ID) {

       this.ID = ID;

   }

   public float getgrade_point() {

       return grade_point;

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   public void setgrade_point(float grade_point) {

       this.grade_point = grade_point;

   }

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       listpro clone = new listpro(Name,ID,grade_point);

       return clone;

   }

   public String toString(){

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   }

   public void input(){

       Name = JOptionPane.showInputDialog("Enter a Name");

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   }

}

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