@erichoresnyi #COIP21

So#ware  Eco-­‐Design   @

Stre

amda

taIO

@YourTwitterHandle #DVXFR14{session hashtag} @erichoresnyi #COIP21

Objectives

The  Art  of  Coding  is  about  balancing    UX,  performance,  and  resources    This  talk  does  not  cover  the  unlimited  benefits  of  coding  in  resource  management:    smart  grids,  ciDes,  transports…    This  talk  covers  the  impact  of  IT  resource  management  on  the  planet.  

@erichoresnyi #COIP21

What  is  the  ICT  carbon  footprint?  Energy:  40  Nuclear  Plants  

2x  France    

Greenhouse  Gas  1/2  of  France  

 Water  consumpDon    

1.5  France  

@erichoresnyi #COIP21

What  makes  the  ICT  footprint  

Make  =  2/3  Making  a  device  emits  100x  GHG  than  its  use  

More  energy  used  than  during  lifeDme  

Run  =  negligible    

Dispose  ≈  1/3  

@erichoresnyi #COIP21

Logical  soluDon  

Less Make è Less Impact !

BUT

Actually, desktop lifespan divided by 3 over the last 30 years !

Where is the catch ?

@erichoresnyi #COIP21

The  role  of  Bloatware  

Electronic  lifespan  extends  BUT  latest  versions  cannot  run    

Windows98-­‐Office97  è  Windows  8-­‐Office  114  more  RAM  needed  in  20  years  

 Web  pages  get  25%  fader  every  year  

@erichoresnyi #COIP21

What  can  we  do  about  it  ?  

So#ware  Eco  Design    =  

Efficiency:  Same  Performance,  

Less  resources  in  RAM,  CPU,  Bandwidth  ê  

Less  Make  

@erichoresnyi #COIP21

Microso#  Bing  

 80%  energy  efficiency  

 by  removing  

 20%  of  search  results  

@erichoresnyi #COIP21

Linkedin    

MigraDon  to  node.js    =    

Server  infrastructure  /  10  Efficiency  x112  

@erichoresnyi #COIP21

Yahoo  vs  Google    

ExhausDve  Vs    To-­‐the-­‐point  design  ê  

/2  data  sent  +  

/5  HTTP  requests  +    

/3    CompleDon  Delay  (PLT)  

@erichoresnyi #COIP21

SNCF  vs  Capitaine  Train      

ExhausDve  vs  To-­‐the-­‐point  design  ê  

/5  data  +  

/20  HTTP  requests  

@erichoresnyi #COIP21

PMU  vs  Betclic    

TradiDonal  vs  PerDnent  design  ê  

/5  Data  +  

/2  TransacDon  Time  +  

Challenger=Mobile  Leader  

@erichoresnyi #COIP21

Waste  in  code      

70%  features    are  never    

or  rarely  used  ê  

α-­‐  UX  -­‐  ω  

@erichoresnyi #COIP21

Network-­‐Based  So#ware:  a  threat?    

Data  per  device  grows  51%  per  year  X  

Number  of  devices  increases  40%  a  year  X  

Bandwidth  increases  19%  a  year  =  

Network  impact  doubling  every  year  

@erichoresnyi #COIP21

RESTful  API  =  sustainable  code  

Network  Based  So#ware  =  

SeparaDon  of  concern  client/server  Stateless  Cacheable  

Layered  systems,  eg  proxies  Uniform  interface  

 

@erichoresnyi #COIP21

Microservices  =  Be  Responsible  

ComponenDzaDon  via  Services  Organized  around  Business  CapabiliDes  

Products  not  Projects  Smart  endpoints  and  dumb  pipes  

Decentralized  Governance  Decentralized  Data  Management  

Infrastructure  AutomaDon  Design  for  failure  

EvoluDonary  Design  

@erichoresnyi #COIP21

Streaming  APIs      

With  cache,  server  load  divided  by  x10  to  100  (facebook,  twider)    

If  differenDal,  data  reduced  by  x10  to  100  on  top    

Device  badery  consumpDon  divided  by  4  

@erichoresnyi #COIP21

Key  Takeaways  

 ICT  impact  on  earth=40  nuclear  plants,  

growing  x2  than  other  sector    

Key  ICT  impact:  make  &  dispose  ê  

Eco-­‐efficient  design  =  to-­‐the-­‐point  

@erichoresnyi #COIP21

Credits  Research  by  F.Bordage  @greenit  Cisco  VNI:  y-­‐o-­‐y  data  growth  Masterpiece  of  architecture  :  R.Fielding,  REST  thesis  (2000)  Dinh&Boonkrong,  UniversityBangkok  InfoQ,  on  Linkedin  to  Node.js  MarDn  Fowler  @thoughtworks  on  microservices  Special  thanks  to  @vlavschneid,  @verseo_fr  and  the  @StreamdataIO  crew  for  supporDng  this  quest  

@erichoresnyi #COIP21

Recos  Read  Fred’s  book  

 Monday  April  11th,  Assemblée  NaDonale  Paris,  prepare  #COIP,  

Meetup    

Come  to  EcoInfo  10th  year  day  April  23rd,  CNRS  Paris  16th  

 And  communicate  to  the  world  #COIP  

D-­‐236  days  in  Paris  (too)  

@erichoresnyi #COIP21

A#erword  

 Pix  are  mine  

My  grandchildren  will  not  see  the  Guerande  saltmarsh,    Maurienne  glacier    and  Amsterdam;    

unless  we  all  try  to  do  something  about  it  at  our  scale,    starDng  NOW