Conference Session, 23rd High Speed Network Conference at Pusan, Korea

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

33.
HSN

34. 2013

35. 2

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

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

103. Delivery

104. Types

105.
Upload

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

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

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

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

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

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)

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

318.
HSN

319. 2013

320. 10

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

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

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

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

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

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

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

651.
Source:
Google
Image
Search
HSN

652. 2013

653. 17