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CDN 기술 동향과 전망 (CDN Technology Trends) - HSN 2013
1.
CDN
2.
기술
3.
동향과
4.
전망
5.
(CDN
6.
Technology
7.
Trends)
8.
Junho
9.
Choi,
10.
CTO,
11.
CDNetworks
12.
High
13.
Speed
14.
Network
15.
2013
16.
rev. 1
17.
Contents
18.
l
CDN
19.
Market
20.
l
Changes
21.
on
22.
CDN
23.
Market
24.
l
CDN
25.
Basics
26.
l
CDN
27.
Services
28.
l
Advanced
29.
CDN
30.
Topics
31.
l
Observations
32.
33.
HSN
34.
2013
35.
2
36.
37.
Worldwide
38.
CDN
39.
Market
40.
Size
41.
3500 3000 2500 2000 Revenue ($Mil.) 1500 1000 500 0 2010 2011 2012 2013 2014 U.S. market is 65.6% in 2011. Source: AccuStream Research. HSN
42.
2013
43.
3
44.
45.
CDN Business Transformation
and Market Analytics 2012 – 2014 CDN
46.
Market
47.
Share
48.
CDN REVENUE 2010 2011 CDN 2010 Rev. % Mkt. 2011 Rev. % Mkt. ($Mil.) ($Mil.) Akamai $1,023.6 64.7% $1,177.1 63.2% Limelight $166.7 10.5% $190.0 10.2% CD Networks $100.0 6.3% $130.0 7.0% Level 3 $66.6 4.2% $80.0 4.3% Mirror Image $43.6 2.8% $52.3 2.8% Highwinds $83.0 5.3% $95.5 5.1% EdgeCast $25.1 1.6% $50.2 2.7% Cachefly $19.0 1.2% $27.0 1.5% BitGravity $13.0 0.8% $18.2 1.0% Internap $15.0 0.9% $18.0 1.0% Alcatel Lucent $12.0 0.8% $0.0 0.0% Liquid Compass $6.5 0.4% $7.0 0.4% Abacast $4.0 0.3% $5.2 0.3% Acquired by Cotendo $2.8 0.2% $8.4 0.5% Akamai (2011/12) 3Crowd $0.0 n/a $2.5 0.1% Acquired by Total: $1,580.9 $1,861.3 ForHnet (2013/1) Source: AccuStream Research. HSN
49.
2013
50.
4
51.
New CDN entrants are aggregating (federated model) under-utilized infrastructure to provision their services, and some smaller CDNs are exploiting Amazon’s CloudFront server infrastructure on-demand service to reduce CAP EX outlays
52.
CDN
53.
Basics
54.
User
55.
in
56.
Tokyo
57.
Korea
58.
Edge
59.
POP
60.
Web
61.
Site
62.
(오리진)
63.
Japan
64.
First
65.
Mile
66.
Reducing
67.
User
68.
in
69.
LA
70.
Origin
71.
Internet
72.
traffic
73.
Last
74.
Mile
75.
Middle
76.
Mile
77.
and
78.
load
79.
Edge
80.
POP
81.
US
82.
Edge
83.
POP
84.
UK
85.
User
86.
in
87.
London
88.
Close
89.
to
90.
end
91.
users
92.
Caching
93.
Origin
94.
Contents
95.
3G/LTE
96.
without
97.
middle
98.
mile
99.
HSN
100.
2013
101.
5
102.
103.
Delivery
104.
Types
105.
Upload
106.
107.
Contents
108.
A. PUSH TYPE and
109.
Push
110.
Edge Server Internet
111.
Delivery Contents
112.
are
113.
preloaded
114.
before
115.
delivery
116.
Upload
117.
118.
B. PULL TYPE (Caching) Contents
119.
Edge Cache Internet
120.
Delivery Contents
121.
are
122.
cached
123.
on
124.
demand
125.
HSN
126.
2013
127.
6
128.
129.
Global
130.
Server
131.
Load
132.
Balancing
133.
Local DNS GSLB Origin
134.
(Resolver) om Contents
135.
A. DNS w. foo.c (DNS) 2 ww Internet
136.
• Global CDN • Unicast DNS vs 4 Delivery Anycast DNS Edge Cache • Unicast Cache vs Anycast Cache Contents
137.
are
138.
cached
139.
on
140.
demand
141.
(EdgeCast, Highwinds) • EDNS client-‐subnet B. HTTP RedirecHon GSLB Origin
142.
(HTTP) Contents
143.
Internet
144.
• Client IP based • More accurate 2 GET (again) but 2x request Edge Cache delay Contents
145.
are
146.
• Telco CDN cached
147.
on
148.
demand
149.
HSN
150.
2013
151.
7
152.
153.
Services
154.
l Basic
155.
CDN
156.
Service
157.
• Push
158.
Type
159.
(HTTP,
160.
FTP)
161.
• Pull
162.
Type
163.
(HTTP/S
164.
Caching)
165.
• Legacy
166.
Streaming
167.
(WMS(MMS/RTSP),
168.
FMS(RTMP),
169.
RTSP)
170.
− On
171.
Demand
172.
and
173.
Live
174.
• HTTP
175.
Streaming
176.
(Apple,
177.
Microsoft,
178.
Adobe,
179.
MPEG
180.
DASH)
181.
− On
182.
Demand
183.
and
184.
Live
185.
• Portals
186.
(Statistics,
187.
Control
188.
Panel,
189.
Customer
190.
Support)
191.
l Value-Added
192.
• SSL
193.
(consumes
194.
IP
195.
per
196.
cert)
197.
• Storage
198.
(contents
199.
origin,
200.
backup,
201.
geo
202.
distributed)
203.
• One-time
204.
URL
205.
(access
206.
control)
207.
• Content
208.
Protection
209.
(DRM)
210.
• Complex
211.
rule
212.
set
213.
for
214.
caching
215.
• Access
216.
Log
217.
Delivery
218.
• Advanced
219.
Analytics
220.
HSN
221.
2013
222.
8
223.
224.
Changes
225.
on
226.
CDN
227.
Market
228.
l ISP
229.
started
230.
to
231.
enter
232.
CDN
233.
market
234.
aggressively
235.
l Reseller,
236.
Managed
237.
CDN,
238.
Licensed
239.
CDN,
240.
Federated
241.
CDN
242.
l Build
243.
its
244.
own
245.
CDN
246.
vs
247.
Use
248.
CDN
249.
solutions
250.
Source: edgecast.com HSN
251.
2013
252.
9
253.
254.
Telco
255.
CDN
256.
l From
257.
simple
258.
reselling
259.
or
260.
building
261.
CDN
262.
for
263.
customer
264.
service
265.
(e.g.
266.
L
evel3),
267.
to
268.
reduce
269.
internal
270.
or
271.
OTT
272.
traffic
273.
(now
274.
various
275.
ISPs)
276.
l Interconnection/federation
277.
issue
278.
between
279.
ISP
280.
CDNs
281.
l
Akamai
282.
Acquired
283.
Verivue
284.
(2012/12)
285.
l
EdgeCast
286.
(Pacnet,
287.
Dell)
288.
l
Cisco
289.
CDN
290.
Federation
291.
Pilot
292.
(2011~)
293.
l
CDNi
294.
(IETF)
295.
296.
l
Big
297.
OTT
298.
CPs
299.
has
300.
its
301.
own
302.
cache
303.
• Google
304.
Global
305.
Cache
306.
for
307.
caching
308.
Google/Youtube
309.
traffic
310.
• Netflix
311.
Open
312.
Connect
313.
CDN
314.
for
315.
Netflix
316.
traffic
317.
318.
HSN
319.
2013
320.
10
321.
322.
Mobile
323.
CDN
324.
l Increasing
325.
use
326.
of
327.
smartphones/tablets
328.
results
329.
in
330.
explosion
331.
of
332.
mobile
333.
data
334.
traffic
335.
l Video
336.
traffic
337.
dominates
338.
(over
339.
60%)
340.
l High
341.
latency
342.
than
343.
fixed
344.
Internet,
345.
limited
346.
data
347.
plan
348.
Mobile Network RTT Latency 200 150 100 Latency (ms) 50 0 WCDMA HSDPA rel5 HSDPA rel6 LTE l Akamai-Ericsson
349.
(2011/2)
350.
l CDNetworks-KDDI
351.
(2013/1)
352.
l SK
353.
Telecom
354.
(2013/1)
355.
HSN
356.
2013
357.
11
358.
359.
Mobile
360.
CDN
361.
Concept
362.
Internet * Network Address Translator NAT Cache Edge traffic is reduced to 1/10 inside IP Mail Web ・・・ Mobile NW Core * Primary Gateway PGW LTE - Video pacing Core - Video Transcoding SGW SGW SGW - Text Compression * Secondary Gateway - TCP Acceleration - Transparent Caching eNB eNB eNB eNB eNB eNB eNB eNB eNB HSN
363.
2013
364.
12
365.
366.
Advanced
367.
CDN
368.
Topics
369.
l Application
370.
Acceleration
371.
(HTTP/HTTPS)
372.
• For
373.
accelerating
374.
non-cached
375.
contents
376.
• Reducing
377.
round
378.
trips
379.
and
380.
compress
381.
bandwidth
382.
in
383.
middle
384.
mile
385.
• DWA,
386.
DSA,
387.
WAA
388.
…⋯
389.
l Network
390.
Acceleration
391.
(non-HTTP)
392.
• For
393.
non-HTTP
394.
contents
395.
(VPN,
396.
Remote
397.
Desktop)
398.
• Accelerates
399.
IP
400.
connections
401.
in
402.
middle
403.
mile
404.
• DNA,
405.
IPA,
406.
…⋯
407.
l GSLB
408.
(DNS
409.
Load
410.
Balancing)
411.
as
412.
a
413.
Service
414.
• Controlling
415.
customer
416.
domain
417.
without
418.
CDN
419.
• With
420.
or
421.
without
422.
CDN
423.
l Content
424.
Adaptation
425.
(Geo
426.
Targeting)
427.
• Based
428.
on
429.
various
430.
rules
431.
(e.g.
432.
client
433.
IP,
434.
local
435.
DNS
436.
IP,
437.
specific
438.
header,
439.
la
nguage
440.
or
441.
user-agents)
442.
• Allow,
443.
block
444.
or
445.
redirect
446.
contents
447.
HSN
448.
2013
449.
13
450.
451.
Advanced
452.
CDN
453.
Topics
454.
(2)
455.
l Security
456.
(Anti-DDOS)
457.
• CDN
458.
is
459.
easy
460.
to
461.
be
462.
attacked
463.
• CDN
464.
is
465.
distributed
466.
system
467.
by
468.
nature
469.
–
470.
can
471.
handle
472.
attacks
473.
• Absorbing
474.
global
475.
DDOS
476.
attacks
477.
l Security
478.
(Web
479.
Application
480.
Firewall)
481.
• Filter
482.
unsafe
483.
access
484.
from
485.
edge
486.
server
487.
before
488.
going
489.
to
490.
origin
491.
• Protects
492.
origin
493.
from
494.
exploits
495.
l FEO
496.
• Reducing
497.
connections
498.
and
499.
loading
500.
time
501.
• HTTP
502.
and
503.
HTML/scripting
504.
techniques
505.
• Running
506.
FEO
507.
engine
508.
on
509.
Edge
510.
Cache
511.
• mod_pagespeed
512.
(Google,
513.
EdgeCast)
514.
• Blaze
515.
(Akamai),
516.
Strangeloop,
517.
Yottaa
518.
17.8 sec 8.3 sec Source: strangeloop networks HSN
519.
2013
520.
14
521.
522.
Advanced
523.
CDN
524.
Topics
525.
(3)
526.
l Measurements
527.
• Synthetic
528.
Monitoring
529.
− Active
530.
Measurement
531.
using
532.
fixed
533.
agent
534.
− Waterfall
535.
charts
536.
and
537.
global
538.
nodes
539.
− Various
540.
browsers
541.
and
542.
devices
543.
− webpagetest.org
544.
(open
545.
source)
546.
− Gomez,
547.
Keynote,
548.
Webmetrics,
549.
Catchpoint,
550.
pingdom
551.
…⋯
552.
• Real
553.
User
554.
Monitoring
555.
(RUM)
556.
− Passive
557.
measurements
558.
using
559.
JS
560.
tags
561.
− boomerang.js
562.
(open
563.
source)
564.
− Google
565.
Analytics,
566.
Lognormal
567.
− Cedexis,
568.
Turbobytes
569.
− Based
570.
on
571.
HTML5
572.
navigation
573.
timing
574.
API
575.
• For
576.
mobile,
577.
more
578.
consideration
579.
required
580.
− Supported
581.
mobile
582.
devices
583.
(iOS,
584.
Android,
585.
Blackberry
586.
etc)
587.
− Browser
588.
limitation
589.
(iOS,
590.
Android,
591.
Chrome)
592.
− Different
593.
Network
594.
Types
595.
(Wifi,
596.
3G,
597.
LTE)
598.
HSN
599.
2013
600.
15
601.
602.
Performance
603.
l For
604.
global
605.
CDN,
606.
performance
607.
is
608.
important
609.
for
610.
choosing
611.
CDNs
612.
• Connect
613.
time
614.
=
615.
latency
616.
to
617.
edge
618.
cache
619.
• DNS
620.
latency
621.
=
622.
DNS
623.
resolving
624.
time
625.
• Download
626.
time
627.
=
628.
TCP
629.
efficiency
630.
HSN
631.
2013
632.
16
633.
634.
Observations
635.
l Keywords
636.
for
637.
2013
638.
and
639.
beyond
640.
for
641.
CDN…⋯
642.
l
FEO
643.
l
IPv6
644.
l
Mobile
645.
l
MPEG-DASH
646.
l
RUM
647.
l
Security
648.
l
Telco
649.
CDN
650.
651.
Source: Google Image Search HSN
652.
2013
653.
17
654.