Designing a Private CDN with an Off-Sourced Network Infrastructure: - - PowerPoint PPT Presentation

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SoftCOM 2018, Sep., 13-15, Supetar, Croatia 1

Designing a Private CDN with an Off-Sourced Network Infrastructure: Model and Case Study

Claudia Canali, Andrea Corbelli, Riccardo Lancellotti University of Modena and Reggio Emilia Department of engineering “Enzo Ferrari”

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SoftCOM 2018, Sep., 13-15, Supetar, Croatia 2

C D N

• v

e r v i e w

• C
• n

t e n t D e l i v e r y N e t w

• r

k

• O

r i g i n s e r v e r

• E

d g e s e r v e r s

– D

e

• m

u l t i p l e x i n g

– T

r a n s c

• d

i n g

– L

• c

a t e d

• n

n e t w

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k e d g e

• H

e t e r

• g

e n e

• u

s c l i e n t s

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SoftCOM 2018, Sep., 13-15, Supetar, Croatia 3

I n t r

• d

u c i n g P

• C

D N

• C
• n

t e n t p r

• v

i d e r i s a l s

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• n

t e n t c

• n

s u m e r

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D N m a n a g e r

• N

e t w

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k i n f r a s t r u c t u r e

• u

t s

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r c e d

• D

i fg e r e n c e s w i t h t r a d i t i

• n

a l C D N

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i fg e r e n t w

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k l

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d

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i m i t e d c

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t r

• l
• v

e r n e t w

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k i n f r a s t r u c t u r e

• →

A v a i l a b l e l i t e r a t u r e n

• t

s u i t a b l e f

• r

t h i s s c e n a r i

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SoftCOM 2018, Sep., 13-15, Supetar, Croatia 4

M

• d

e l

• v

e r v i e w ( s i mp l i fj e d )

• M

i n i m i z e n u m b e r

• f

e d g e s e r v e r ( 1 . 1 )

• D
• n
• t

e x c e e d d

• w

n l

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d b a n d w i d t h ( 1 . 2 )

• D
• n
• t

e x c e e d

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i g i n s e r v e r b a n d w i d t h ( 1 . 3 )

1 if edge 0 otherwise BW if not edge BW if edge BW of location l

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SoftCOM 2018, Sep., 13-15, Supetar, Croatia 5

H e u r i s t i c s

• A

l l

• c

a t e b a n d w i d t h t

• c

l i e n t s

• P
• s

s i b l e

• u

t c

• m

e

– N

• c

l i e n t s s u p p

• r

t e d

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• m

e c l i e n t s n

• t

s u p p

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t e d

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a r t i a l c l i e n t s u p p

• r

t

– C

• m

p l e t e c l i e n t s u p p

• r

t

• P

l a c e e d g e s e r v e r s ( T h r )

• M

a n a g e s a t e l l i t e l

• c

a t i

• n

s

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SoftCOM 2018, Sep., 13-15, Supetar, Croatia 6

H e u r i s t i c s

• F

i n d c l

• s

e s t l

• c

a t i

• n

s t

• e

a c h e d g e

• T

r y t

• a

d d a s s a t e l l i t e l

• c

a t i

• n

s ( i f B W i s O K )

• R

e

• i

t e r a t e

• N
• t

e :

– N

O S a t e l l i t e l

• c

a t i

• n

s t

• f

a r f

• r

m e d g e

– S

h

• u

l d b e a n

• p

t i m i z a t i

• n

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SoftCOM 2018, Sep., 13-15, Supetar, Croatia 7

• P

r e l i m i n a r y a n a l y s i s

• f

d a t a

• F

i t t i n g w i t h l

• g

n

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m a l & e x p

• n

e n t i a l t r u n c a t e d d i s t r i b u t i

• n

s

• →

N

• h

e a v y t a i l e d b e h a v i

• r

E x p e r i me n t a l s c e n a r i

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SoftCOM 2018, Sep., 13-15, Supetar, Croatia 8

E x p e r i me n t a l s e t u p

• F
• c

u s

• n

l i v e s t r e a m i n g s c e n a r i

• L
• c

a t i

• n

s w i t h B W < 5 1 2 K b / s n

• t

c

• n

s i d e r e d

• 3

e n c

• d

i n g s f

• r

c l i e n t s

– L

D : 5 1 2 K b / s

– S

D : 1 M b / s

– H

D : 1 . 5 M b / s

• O

u r H D i s f a r f r

• m

Y

• u

T u b e

• l

i k e H D q u a l i t y

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SoftCOM 2018, Sep., 13-15, Supetar, Croatia 9

P

• C

D N e v a l u a t i

• n

P-CDN No P-CDN # Locations Too small 99 Edge 77 Satellite 19 Origin 18 213 # Clients LD 1577 1986 SD 94 94 HD 466 57

• H

D c l i e n t s : 5 7 →4 6 6 . I m p r

• v

e m e n t > 7 X

• L
• c

a t i

• n

s s e r v e d b y

• r

i g i n s e r v e r s : 2 1 3 →1 8 + 7 7 . D r

• p

> 5 5 %

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SoftCOM 2018, Sep., 13-15, Supetar, Croatia 10

S e n s i t i v i t y t

• T

h r p a r a me t e r

• I

m p a c t

• n

l

• c

a t i

• n

s ( T h r g r

• w

s )

– T

• S

m a l l l

• c

a t i

• n

s g r

• w

s

– S

a t e l l i t e l

• c

a t i

• n

s d r

• p

s ( l e s s e d g e s e r v e r s )

• I

m p a c t

• n

c l i e n t s ( T h r g r

• w

s )

– S

i m i l a r t

• l
• c

a t i

• n

s

– E

fg e c t l e s s e v i d e n t ( i m p a c t

• n

l

• c

a t i

• n

s w i t h f e w c l i e n t s )

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SoftCOM 2018, Sep., 13-15, Supetar, Croatia 11

S e n s i t i v i t y t

• T

h r p a r a me t e r

• I

n c r e a s i n g T h r r e d u c e s t h e E d g e s e r v e r B W

• S

a t e l l i t e l

• c

a t i

• n

s a r e a m i n

• r

c

• n

t r i b u t i

• n
• I

n c r e a s i n g T h r f u r t h e r r e d u c e s i m p a c t

• f

s a t e l l i t e s

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SoftCOM 2018, Sep., 13-15, Supetar, Croatia 12

C

• n

c l u s i

• n

s

• D

e s i g n

• f

a P r i v a t e C D N

– P

r

• b

l e m n

• t

d i s c u s s e d w i d e l y i n l i t e r a t u r e

– S

p e c i fj c c

• n

s t r a i n t s ( w

• r

k l

• a

d & i n f r a s t r u c t u r e )

• P

r

• p
• s

a l

• f

f

• r

m a l m

• d

e l & h e u r i s t i c s

• A

p p l i c a t i

• n

t

• a

c a s e s t u d y ( n a t i

• n

w i d e I t a l i a n c

• m

p a n y )

– P

• s

i t i v e i m p a c t

• f

P

• C

D N i n f r a s t r u c t u r e

– H

i g h c

• s

t : n e e d t

• k

e e p l

• w

n u m b e r

• f

e d g e s e r v e r s

– B

W m a y b e a n i s s u e ( l

• w

d a t a r a t e f

• r

H D )

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SoftCOM 2018, Sep., 13-15, Supetar, Croatia 13

Designing a Private CDN with an Off-Sourced Network Infrastructure: Model and Case Study

Claudia Canali, Andrea Corbelli, Riccardo Lancellotti Authors acknowledge support of: 47 Deck project S2C (Secure and Software-defined Cloud)