Simulation Results

                      

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Appendix 1: Java Security

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Appendix 3: Source Code

Demo: A Test Drive 

 

 

 

Below there are the results of our simulation. In our simulation we have used 3 servers at  Geocities, Acmecity and Fortunecity which provide free homepages for the public. We have uploaded the encoded file to these servers and then downloaded the file from these server using our demonstation applet. Afterwards we have downloaded the single files from the servers to compare our result with other download methods.

 

 

Server 1: acmecity

 

 

 

Server 2: geocities

 

 

 

1MB

4.68M

KB/Sec

 

 

1MB

4.68M

KB/Sec

Test 1

403

1886.04

2.540943

 

Test 1

156

730.08

6.564103

Test 2

296

1385.28

3.459459

 

Test 2

154

720.72

6.649351

Test 3

263

1230.84

3.893536

 

Test 3

159

744.12

6.440252

Test 4

388

1815.84

2.639175

 

Test 4

150

702

6.826667

Test 5

218

1020.24

4.697248

 

Test 5

206

964.08

4.970874

Test 6

283

1324.44

3.618375

 

Test 6

212

992.16

4.830189

Test 7

277

1296.36

3.696751

 

Test 7

230

1076.4

4.452174

 

 

 

 

 

 

 

 

 

stdev

67.29042

314.919

0.741974

 

Stdev

33.63034

157.39

1.017455

avg

304

1422.72

3.506498

 

Avg

181

847.08

5.819087

 

 

Server 3: fortunecity

 

 

 

Our algoritm

 

 

 

1MB

4.68M

KB/Sec

 

 

1MB

4.68M

KB/Sec

Test 1

59

276.12

17.35593

 

Test 1

32.0513

150

33.14667

Test 2

65

304.2

15.75385

 

Test 2

33.9744

159

31.27044

Test 3

69

322.92

14.84058

 

Test 3

38.8889

182

27.31868

Test 4

62

290.16

16.51613

 

Test 4

35.6838

167

29.77246

Test 5

66

308.88

15.51515

 

Test 5

33.547

157

31.66879

Test 6

63

294.84

16.25397

 

Test 6

49.1453

230

21.61739

Test 7

77

360.36

13.2987

 

Test 7

43.8034

205

24.25366

 

 

 

 

 

 

 

 

 

stdev

5.843189

27.3461

1.306258

 

Stdev

5.79783

27.13383

3.922377

avg

65.85714

308.211

15.64776

 

Avg

38.1563

178.5714

28.43544

 

If we sum the average download rate of the single servers we get  24.97334KB/s which is close to the data transfer rate we receive in our appliacation.

 

The gain rates we achive in througput are

712% compared to Acmecity,

389% compared to Geocities and

81% compared to FortuneCity.

 


The following chart illustrates the average download speed in kbps:

 


 

 

As we can see using our download method is better that downloading from a single mirror site in 700% for slow servers to 80% for fast servers.


Please contact Genady or Nir regarding copyright issues 
For problems or questions regarding this web contact the members.
Last updated: Wednesday, September 08, 1999.