Sync'ed Clients and Traffic Trends

sync’ed	
  clients	
  and	
  traffic	
  trends	
Matsuzaki	
  ‘maz’	
  Yoshinobu	
  
<maz@iij.ad.jp>	
2015/05	
 maz@iij.ad.jp	
 1
traffic	
  and	
  network	
  design	
•  we	
  plan	
  upgrading	
  based	
  on	
  traffic	
  trend	
  
– to	
  avoid	
  congesGons	
  
2015/05	
 maz@iij.ad.jp	
 2
network	
  design	
  #1	
•  over-­‐subscripGon	
  
– only	
  some	
  of	
  users	
  uses	
  the	
  network	
  at	
  once	
  
– expecGng	
  staGsGcal	
  mulGplexing	
  effect	
  
– need	
  to	
  esGmate	
  uGlizaGon	
  to	
  avoid	
  congesGon	
User
User
100Mbps
100Mbps
100Mbps
Internet
2015/05	
 maz@iij.ad.jp	
 3
network	
  design	
  #2	
•  over-­‐provisioning	
  
– provide	
  more	
  bandwidth	
  than	
  needed	
  
User
User
100Mbps
100Mbps
1Gbps
Internet
2015/05	
 maz@iij.ad.jp	
 4
backbone	
  network	
  design	
•  based	
  on	
  over-­‐subscripGon	
  
– we	
  can	
  expect	
  more	
  staGsGcal	
  mulGplexing	
  effect	
  
– cost	
  effecGve	
  	
  
•  over-­‐provisioning	
  to	
  its	
  uGlizaGon	
  
– for	
  redundancy	
  
– low	
  latency	
Backbone
staGsGcal	
  mulGplexing	
  effect	
  
2015/05	
 maz@iij.ad.jp	
 5
typical	
  traffic	
•  enterprises	
  
•  consumers	
  
•  CDN	
  
•  IX	
  
•  mobile	
  
2015/05	
 maz@iij.ad.jp	
 6
enterprise	
2015/05	
 maz@iij.ad.jp	
 7
enterprise	
  weekday	
2015/05	
 maz@iij.ad.jp	
 8
consumer	
  (broadband)	
2015/05	
 maz@iij.ad.jp	
 9
consumer	
  weekday	
2015/05	
 maz@iij.ad.jp	
 10
consumer	
  weekend	
2015/05	
 maz@iij.ad.jp	
 11
CDN	
  (contents	
  distribuGon	
  network)	
2015/05	
 maz@iij.ad.jp	
 12
CDN	
  weekday	
2015/05	
 maz@iij.ad.jp	
 13
CDN	
  weekend	
2015/05	
 maz@iij.ad.jp	
 14
IX	
  (Internet	
  Exchange)	
2015/05	
 maz@iij.ad.jp	
 15
IX	
  weekday	
2015/05	
 maz@iij.ad.jp	
 16
IX	
  weekend	
2015/05	
 maz@iij.ad.jp	
 17
mobile	
2015/05	
 maz@iij.ad.jp	
 18
mobile	
  weekday	
2015/05	
 maz@iij.ad.jp	
 19
mobile	
  weekend	
2015/05	
 maz@iij.ad.jp	
 20
traffic	
  trend	
•  we	
  can	
  upgrade	
  based	
  on	
  that	
  
– important!	
  
•  know	
  your	
  customer	
  
– how	
  they	
  are	
  using	
  network	
  
2015/05	
 maz@iij.ad.jp	
 21
traffic	
  concentraGon	
•  it	
  someGmes	
  happens	
  
•  ‘staGsGcal	
  mulGplexing	
  effect’	
  is	
  reduced	
  
2015/05	
 maz@iij.ad.jp	
 22
how	
  to	
  deal	
  with	
  concentraGons	
  	
•  upgrade	
  
– more	
  bandwidth	
  
– cost	
  +	
  
•  wait	
  and	
  see	
  
– congesGon	
  
– customer	
  experience	
  -­‐	
  
•  something	
  else	
  
– ??	
  
2015/05	
 maz@iij.ad.jp	
 23
new	
  year	
  greeGngs	
•  January	
  1st	
  00:00-­‐02:00	
  
– phone	
  call	
  
– SMS	
  
– e-­‐mail	
  
– SNS	
  
•  about	
  7	
  Gmes	
  more	
  messages	
  than	
  usual	
  
•  mobile	
  operators	
  have	
  asked	
  users	
  to	
  avoid	
  
such	
  messages	
  during	
  the	
  peak	
  Gme	
  
2015/05	
 maz@iij.ad.jp	
 24
soware/data	
  distribuGon	
•  Windows	
  Update	
  
•  iOS/MacOS	
  Update	
  
•  game	
  update	
  
•  karaoke	
  update	
  
•  several	
  giga	
  byte	
  data	
  
•  at	
  the	
  same	
  Gme	
  
•  many	
  clients	
  
2015/05	
 maz@iij.ad.jp	
 25
iOS8	
•  it	
  seems	
  Apple	
  introduced	
  some	
  kinds	
  of	
  
queuing	
  mechanism	
  
	
  
iOS8	
  started	
  to	
  distribute	
2015/05	
 maz@iij.ad.jp	
 26
mobile	
  device	
•  people	
  bring	
  it	
  always	
  
– they	
  can	
  use	
  it	
  anyGme	
  
•  it	
  changed	
  traffic	
  pacern	
  
– commuGng	
  and	
  lunch	
  Gme	
  
•  commuGng	
  is	
  a	
  challenge	
  for	
  mobile	
  in	
  tokyo	
  
– about	
  3000	
  persons	
  per	
  train	
  
– 47	
  trains	
  per	
  hour	
  
– somehow	
  you	
  need	
  to	
  do	
  handover	
  L	
  
2015/05	
 maz@iij.ad.jp	
 27
mobile	
  devices	
  and	
  alarm	
  clock	
•  clock	
  on	
  mobile	
  devices	
  is	
  well	
  synced	
  
– you	
  can	
  use	
  mobile	
  as	
  a	
  clock	
•  mobile	
  devices	
  ‘sleep’	
  to	
  reduce	
  bacery	
  usage	
  
– and	
  once	
  wakeup,	
  it	
  starts	
  to	
  communicate	
  
•  mobile	
  operators	
  see	
  high	
  traffic	
  peek	
  at	
  
– 6:30,	
  7:00,	
  7:30....	
  
– very	
  short	
  period	
  traffic	
  
2015/05	
 maz@iij.ad.jp	
 28
summary	
•  ‘StaGsGcal	
  mulGplexing	
  effect’	
  is	
  a	
  key	
  of	
  
backbone	
  network	
  design	
  
•  There	
  could	
  be	
  concentraGons	
  because	
  of	
  
social	
  and	
  technical	
  reasons	
  	
  
•  Network	
  operators	
  should	
  give	
  feedback	
  
– to	
  users,	
  CDNs	
  and	
  applicaGon	
  developers	
  
– to	
  avoid	
  concentraGons	
  where	
  possible	
2015/05	
 maz@iij.ad.jp	
 29
1 of 29

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Sync'ed Clients and Traffic Trends