SlideShare a Scribd company logo
UC Berkeley - CS10
Giv ing a talk at Ca l’s CS10 - The
Beauty and Joy     of Computing.
inst. eecs.berkeley.e   du/~cs10/fa10
20 Oct via Twitter for iPhone



  from UC Berkeley
  155 Donner Lab
  Berkeley, CA
   View Tweets at this place
To start... What’s a Tweet?
Follow me!




 twitter.com/raffi
 or send a SMS to 40404
 follow raffi
“Rudimentary communication
among individuals in real time
allows many to move together as
one” - @biz
One Word
April 10, 2008
  4:33:23 PM
One Word
                 April 10, 2008
                   4:33:23 PM




 And it’s over
April 11, 2008
1:27:26 PM
Haiti
January 2010




                Chile
               February 2010
MTV VMAs
              September 2010




 Emmys
August 2010
The humble beginnings
How does Twitter work?
Twitter is just A “struct”, a graph,
& a LIST
A Tweet is a simple thing




                            140 characters
What’s The data structure of a
tweet?

  {
   “id ” : 787167620,
   “text” : “Free”,
   “ date” : “2008-04 -11 13:27:26”
   “user”   : “jamesbuck”
  }*
                                      *not quite, but something like this
Where do they go?

                    Following
                    Followed by
Tweets multiply!
It’s a huge graph
Viewing Tweets
Home Timeline
                 [27886578700,
                  27856404785,
                  27727644786,
                  27679412331,
                 27594550593,
                 27583976236,
                 27580246968,
                 27576503025,
                 27545926564,
                 27545450496,
                27539864336...
Is that it? ... YES! ... sorta ...
things get more complicated at scale
And scaling real-time is hard
How many Tweets are there?
How many Tweets are there?

                             90M!
90M tweets
   per day   ≈   1000 tweets
                 per second
Lots of deliveries
Tweets multiply




                    5,162 people
                  need to see my
                           tweet
@ladygaga
mother mons†er
6.8 million followers

@justinbieber
Justin Bieber
5.7 million followers

@BarakObama
44th President of the United States
5.6 million followers

@raffi
me!
5.1 thousand followers
@ladygaga
   mother mons†er
   6.8 x 106 followers



   @raffi
   me!
   5.1 x 103 followers




differs by               10 3
@ladygaga
 mother mons†er
 6.8 x 106 followers




scaling                10 6
6000
       106

 deliveries
per minute
              =   deliveries
                  per
                  millisecond
A System is only as strong as its
weakest link
80 MB
    per sec
≈   10 ms
    per seek
10 ms
per seek   =   100 seeks
               per second
MySQL
         Can’t generate IDs fast enough
Centralized and a single point of failure




                                     snowflake
                                    Highly available and uncoordinated (10kqps)
                                    Compatible with the           ecosystem
                                    http://github.com/twitter/snowflake
How big are they?


1 tweet text        =   140
                        characters
                    ≈   200 bytes
1000 tweets
 per second       ≈       195 KB/sec
                  ≈ 11 MB/min
                  ≈ 16 GB/day
       Just tweet text!
Lots of deliveries
1

                   Digraph                           2
            Need to represent this

                                                         4
    1   2      3     4                    3
1




                             Matrix
2




                             Naïve implementation is not scalable
3
4
Photo used under Creative Commons from jurvetson




          Distributed graph database

flockdb   High rate of CRUD operations
          Complex set arithmetic queries
          http://github.com/twitter/flockdb
160M registered users




       2006         2008   2010
Using the system


6B API calls
    per day        ≈   70,000 calls
                       per second
Where do we want to be?

           Today - 160M people generate ~1000 TPS

Tomorrow - we want to support half the world and all its devices

        (right now, there are 6B people and 5B phones)
Follow me at
Questions?   twitter.com/raffi

More Related Content

Viewers also liked

Securing Your Ecosystem (FOWA Las Vegas 2011)
Securing Your Ecosystem (FOWA Las Vegas 2011)Securing Your Ecosystem (FOWA Las Vegas 2011)
Securing Your Ecosystem (FOWA Las Vegas 2011)
Raffi Krikorian
 
#rtgeo (Where 2.0 2011)
#rtgeo (Where 2.0 2011)#rtgeo (Where 2.0 2011)
#rtgeo (Where 2.0 2011)
Raffi Krikorian
 
Users and Geo
Users and GeoUsers and Geo
Users and Geo
Raffi Krikorian
 
Twitter and the Real-Time Web
Twitter and the Real-Time WebTwitter and the Real-Time Web
Twitter and the Real-Time Web
Raffi Krikorian
 
Developing for @twitterapi (Techcrunch Disrupt Hackathon)
Developing for @twitterapi (Techcrunch Disrupt Hackathon)Developing for @twitterapi (Techcrunch Disrupt Hackathon)
Developing for @twitterapi (Techcrunch Disrupt Hackathon)
Raffi Krikorian
 
Real-time systems at Twitter (Velocity 2012)
Real-time systems at Twitter (Velocity 2012)Real-time systems at Twitter (Velocity 2012)
Real-time systems at Twitter (Velocity 2012)
Raffi Krikorian
 

Viewers also liked (6)

Securing Your Ecosystem (FOWA Las Vegas 2011)
Securing Your Ecosystem (FOWA Las Vegas 2011)Securing Your Ecosystem (FOWA Las Vegas 2011)
Securing Your Ecosystem (FOWA Las Vegas 2011)
 
#rtgeo (Where 2.0 2011)
#rtgeo (Where 2.0 2011)#rtgeo (Where 2.0 2011)
#rtgeo (Where 2.0 2011)
 
Users and Geo
Users and GeoUsers and Geo
Users and Geo
 
Twitter and the Real-Time Web
Twitter and the Real-Time WebTwitter and the Real-Time Web
Twitter and the Real-Time Web
 
Developing for @twitterapi (Techcrunch Disrupt Hackathon)
Developing for @twitterapi (Techcrunch Disrupt Hackathon)Developing for @twitterapi (Techcrunch Disrupt Hackathon)
Developing for @twitterapi (Techcrunch Disrupt Hackathon)
 
Real-time systems at Twitter (Velocity 2012)
Real-time systems at Twitter (Velocity 2012)Real-time systems at Twitter (Velocity 2012)
Real-time systems at Twitter (Velocity 2012)
 

Similar to Twitter - Guest Lecture UC Berkeley CS10 Fall 2010

500Startups @ Twitter
500Startups @ Twitter500Startups @ Twitter
500Startups @ Twitter
Raffi Krikorian
 
Twitter Rules
Twitter RulesTwitter Rules
Twitter Rules
Sugree Phatanapherom
 
Joyent circa 2006 (Scale with Rails)
Joyent circa 2006 (Scale with Rails)Joyent circa 2006 (Scale with Rails)
Joyent circa 2006 (Scale with Rails)
bcantrill
 
08 multimedia delivering
08 multimedia delivering08 multimedia delivering
From incubator to exit: A brief history of Reddit, the first YCombinator success
From incubator to exit: A brief history of Reddit, the first YCombinator successFrom incubator to exit: A brief history of Reddit, the first YCombinator success
From incubator to exit: A brief history of Reddit, the first YCombinator success
Startupfest
 
Evolution of The Twitter Stack
Evolution of The Twitter StackEvolution of The Twitter Stack
Evolution of The Twitter Stack
Chris Aniszczyk
 
Storm session
Storm sessionStorm session
Storm session
ABC Talks
 
Twitter Awesomeness
Twitter AwesomenessTwitter Awesomeness
Twitter Awesomeness
Damon Cortesi
 
LeWeb 2011 - Analysis
LeWeb 2011 - AnalysisLeWeb 2011 - Analysis
LeWeb 2011 - Analysis
Visibli
 

Similar to Twitter - Guest Lecture UC Berkeley CS10 Fall 2010 (9)

500Startups @ Twitter
500Startups @ Twitter500Startups @ Twitter
500Startups @ Twitter
 
Twitter Rules
Twitter RulesTwitter Rules
Twitter Rules
 
Joyent circa 2006 (Scale with Rails)
Joyent circa 2006 (Scale with Rails)Joyent circa 2006 (Scale with Rails)
Joyent circa 2006 (Scale with Rails)
 
08 multimedia delivering
08 multimedia delivering08 multimedia delivering
08 multimedia delivering
 
From incubator to exit: A brief history of Reddit, the first YCombinator success
From incubator to exit: A brief history of Reddit, the first YCombinator successFrom incubator to exit: A brief history of Reddit, the first YCombinator success
From incubator to exit: A brief history of Reddit, the first YCombinator success
 
Evolution of The Twitter Stack
Evolution of The Twitter StackEvolution of The Twitter Stack
Evolution of The Twitter Stack
 
Storm session
Storm sessionStorm session
Storm session
 
Twitter Awesomeness
Twitter AwesomenessTwitter Awesomeness
Twitter Awesomeness
 
LeWeb 2011 - Analysis
LeWeb 2011 - AnalysisLeWeb 2011 - Analysis
LeWeb 2011 - Analysis
 

More from Raffi Krikorian

How to use Geolocation in your webapp @ FOWA Dublin 2010
How to use Geolocation in your webapp @ FOWA Dublin 2010How to use Geolocation in your webapp @ FOWA Dublin 2010
How to use Geolocation in your webapp @ FOWA Dublin 2010
Raffi Krikorian
 
Intro to developing for @twitterapi
Intro to developing for @twitterapiIntro to developing for @twitterapi
Intro to developing for @twitterapi
Raffi Krikorian
 
Twitter API Annotations
Twitter API AnnotationsTwitter API Annotations
Twitter API Annotations
Raffi Krikorian
 
"What's Happening" to "What's Happening Here" @ Chirp
"What's Happening" to "What's Happening Here" @ Chirp"What's Happening" to "What's Happening Here" @ Chirp
"What's Happening" to "What's Happening Here" @ Chirp
Raffi Krikorian
 
Energy / Tweet
Energy / TweetEnergy / Tweet
Energy / Tweet
Raffi Krikorian
 
Handling Real-time Geostreams
Handling Real-time GeostreamsHandling Real-time Geostreams
Handling Real-time Geostreams
Raffi Krikorian
 
Adding the "Where" to the "When"
Adding the "Where" to the "When"Adding the "Where" to the "When"
Adding the "Where" to the "When"
Raffi Krikorian
 
What's happening here?
What's happening here?What's happening here?
What's happening here?
Raffi Krikorian
 
WattzOn @ ETech 2009
WattzOn @ ETech 2009WattzOn @ ETech 2009
WattzOn @ ETech 2009
Raffi Krikorian
 
Scala + WattzOn, sitting in a tree....
Scala + WattzOn, sitting in a tree....Scala + WattzOn, sitting in a tree....
Scala + WattzOn, sitting in a tree....
Raffi Krikorian
 
WattzOn Whole Earth Simulator
WattzOn Whole Earth SimulatorWattzOn Whole Earth Simulator
WattzOn Whole Earth Simulator
Raffi Krikorian
 
Broken Hearts: How Valentine's Day causes global warming
Broken Hearts: How Valentine's Day causes global warmingBroken Hearts: How Valentine's Day causes global warming
Broken Hearts: How Valentine's Day causes global warming
Raffi Krikorian
 
WattzOn presentation @ Web 2.0 Summit
WattzOn presentation @ Web 2.0 SummitWattzOn presentation @ Web 2.0 Summit
WattzOn presentation @ Web 2.0 Summit
Raffi Krikorian
 
holmz @ Ignite! NYC
holmz @ Ignite! NYCholmz @ Ignite! NYC
holmz @ Ignite! NYC
Raffi Krikorian
 

More from Raffi Krikorian (14)

How to use Geolocation in your webapp @ FOWA Dublin 2010
How to use Geolocation in your webapp @ FOWA Dublin 2010How to use Geolocation in your webapp @ FOWA Dublin 2010
How to use Geolocation in your webapp @ FOWA Dublin 2010
 
Intro to developing for @twitterapi
Intro to developing for @twitterapiIntro to developing for @twitterapi
Intro to developing for @twitterapi
 
Twitter API Annotations
Twitter API AnnotationsTwitter API Annotations
Twitter API Annotations
 
"What's Happening" to "What's Happening Here" @ Chirp
"What's Happening" to "What's Happening Here" @ Chirp"What's Happening" to "What's Happening Here" @ Chirp
"What's Happening" to "What's Happening Here" @ Chirp
 
Energy / Tweet
Energy / TweetEnergy / Tweet
Energy / Tweet
 
Handling Real-time Geostreams
Handling Real-time GeostreamsHandling Real-time Geostreams
Handling Real-time Geostreams
 
Adding the "Where" to the "When"
Adding the "Where" to the "When"Adding the "Where" to the "When"
Adding the "Where" to the "When"
 
What's happening here?
What's happening here?What's happening here?
What's happening here?
 
WattzOn @ ETech 2009
WattzOn @ ETech 2009WattzOn @ ETech 2009
WattzOn @ ETech 2009
 
Scala + WattzOn, sitting in a tree....
Scala + WattzOn, sitting in a tree....Scala + WattzOn, sitting in a tree....
Scala + WattzOn, sitting in a tree....
 
WattzOn Whole Earth Simulator
WattzOn Whole Earth SimulatorWattzOn Whole Earth Simulator
WattzOn Whole Earth Simulator
 
Broken Hearts: How Valentine's Day causes global warming
Broken Hearts: How Valentine's Day causes global warmingBroken Hearts: How Valentine's Day causes global warming
Broken Hearts: How Valentine's Day causes global warming
 
WattzOn presentation @ Web 2.0 Summit
WattzOn presentation @ Web 2.0 SummitWattzOn presentation @ Web 2.0 Summit
WattzOn presentation @ Web 2.0 Summit
 
holmz @ Ignite! NYC
holmz @ Ignite! NYCholmz @ Ignite! NYC
holmz @ Ignite! NYC
 

Recently uploaded

GNSS spoofing via SDR (Criptored Talks 2024)
GNSS spoofing via SDR (Criptored Talks 2024)GNSS spoofing via SDR (Criptored Talks 2024)
GNSS spoofing via SDR (Criptored Talks 2024)
Javier Junquera
 
LF Energy Webinar: Carbon Data Specifications: Mechanisms to Improve Data Acc...
LF Energy Webinar: Carbon Data Specifications: Mechanisms to Improve Data Acc...LF Energy Webinar: Carbon Data Specifications: Mechanisms to Improve Data Acc...
LF Energy Webinar: Carbon Data Specifications: Mechanisms to Improve Data Acc...
DanBrown980551
 
AWS Certified Solutions Architect Associate (SAA-C03)
AWS Certified Solutions Architect Associate (SAA-C03)AWS Certified Solutions Architect Associate (SAA-C03)
AWS Certified Solutions Architect Associate (SAA-C03)
HarpalGohil4
 
GlobalLogic Java Community Webinar #18 “How to Improve Web Application Perfor...
GlobalLogic Java Community Webinar #18 “How to Improve Web Application Perfor...GlobalLogic Java Community Webinar #18 “How to Improve Web Application Perfor...
GlobalLogic Java Community Webinar #18 “How to Improve Web Application Perfor...
GlobalLogic Ukraine
 
Connector Corner: Seamlessly power UiPath Apps, GenAI with prebuilt connectors
Connector Corner: Seamlessly power UiPath Apps, GenAI with prebuilt connectorsConnector Corner: Seamlessly power UiPath Apps, GenAI with prebuilt connectors
Connector Corner: Seamlessly power UiPath Apps, GenAI with prebuilt connectors
DianaGray10
 
Introducing BoxLang : A new JVM language for productivity and modularity!
Introducing BoxLang : A new JVM language for productivity and modularity!Introducing BoxLang : A new JVM language for productivity and modularity!
Introducing BoxLang : A new JVM language for productivity and modularity!
Ortus Solutions, Corp
 
Day 2 - Intro to UiPath Studio Fundamentals
Day 2 - Intro to UiPath Studio FundamentalsDay 2 - Intro to UiPath Studio Fundamentals
Day 2 - Intro to UiPath Studio Fundamentals
UiPathCommunity
 
Mutation Testing for Task-Oriented Chatbots
Mutation Testing for Task-Oriented ChatbotsMutation Testing for Task-Oriented Chatbots
Mutation Testing for Task-Oriented Chatbots
Pablo Gómez Abajo
 
The Microsoft 365 Migration Tutorial For Beginner.pptx
The Microsoft 365 Migration Tutorial For Beginner.pptxThe Microsoft 365 Migration Tutorial For Beginner.pptx
The Microsoft 365 Migration Tutorial For Beginner.pptx
operationspcvita
 
JavaLand 2024: Application Development Green Masterplan
JavaLand 2024: Application Development Green MasterplanJavaLand 2024: Application Development Green Masterplan
JavaLand 2024: Application Development Green Masterplan
Miro Wengner
 
Y-Combinator seed pitch deck template PP
Y-Combinator seed pitch deck template PPY-Combinator seed pitch deck template PP
Y-Combinator seed pitch deck template PP
c5vrf27qcz
 
"Scaling RAG Applications to serve millions of users", Kevin Goedecke
"Scaling RAG Applications to serve millions of users",  Kevin Goedecke"Scaling RAG Applications to serve millions of users",  Kevin Goedecke
"Scaling RAG Applications to serve millions of users", Kevin Goedecke
Fwdays
 
QR Secure: A Hybrid Approach Using Machine Learning and Security Validation F...
QR Secure: A Hybrid Approach Using Machine Learning and Security Validation F...QR Secure: A Hybrid Approach Using Machine Learning and Security Validation F...
QR Secure: A Hybrid Approach Using Machine Learning and Security Validation F...
AlexanderRichford
 
"NATO Hackathon Winner: AI-Powered Drug Search", Taras Kloba
"NATO Hackathon Winner: AI-Powered Drug Search",  Taras Kloba"NATO Hackathon Winner: AI-Powered Drug Search",  Taras Kloba
"NATO Hackathon Winner: AI-Powered Drug Search", Taras Kloba
Fwdays
 
"What does it really mean for your system to be available, or how to define w...
"What does it really mean for your system to be available, or how to define w..."What does it really mean for your system to be available, or how to define w...
"What does it really mean for your system to be available, or how to define w...
Fwdays
 
Biomedical Knowledge Graphs for Data Scientists and Bioinformaticians
Biomedical Knowledge Graphs for Data Scientists and BioinformaticiansBiomedical Knowledge Graphs for Data Scientists and Bioinformaticians
Biomedical Knowledge Graphs for Data Scientists and Bioinformaticians
Neo4j
 
Apps Break Data
Apps Break DataApps Break Data
Apps Break Data
Ivo Velitchkov
 
Harnessing the Power of NLP and Knowledge Graphs for Opioid Research
Harnessing the Power of NLP and Knowledge Graphs for Opioid ResearchHarnessing the Power of NLP and Knowledge Graphs for Opioid Research
Harnessing the Power of NLP and Knowledge Graphs for Opioid Research
Neo4j
 
inQuba Webinar Mastering Customer Journey Management with Dr Graham Hill
inQuba Webinar Mastering Customer Journey Management with Dr Graham HillinQuba Webinar Mastering Customer Journey Management with Dr Graham Hill
inQuba Webinar Mastering Customer Journey Management with Dr Graham Hill
LizaNolte
 
"Frontline Battles with DDoS: Best practices and Lessons Learned", Igor Ivaniuk
"Frontline Battles with DDoS: Best practices and Lessons Learned",  Igor Ivaniuk"Frontline Battles with DDoS: Best practices and Lessons Learned",  Igor Ivaniuk
"Frontline Battles with DDoS: Best practices and Lessons Learned", Igor Ivaniuk
Fwdays
 

Recently uploaded (20)

GNSS spoofing via SDR (Criptored Talks 2024)
GNSS spoofing via SDR (Criptored Talks 2024)GNSS spoofing via SDR (Criptored Talks 2024)
GNSS spoofing via SDR (Criptored Talks 2024)
 
LF Energy Webinar: Carbon Data Specifications: Mechanisms to Improve Data Acc...
LF Energy Webinar: Carbon Data Specifications: Mechanisms to Improve Data Acc...LF Energy Webinar: Carbon Data Specifications: Mechanisms to Improve Data Acc...
LF Energy Webinar: Carbon Data Specifications: Mechanisms to Improve Data Acc...
 
AWS Certified Solutions Architect Associate (SAA-C03)
AWS Certified Solutions Architect Associate (SAA-C03)AWS Certified Solutions Architect Associate (SAA-C03)
AWS Certified Solutions Architect Associate (SAA-C03)
 
GlobalLogic Java Community Webinar #18 “How to Improve Web Application Perfor...
GlobalLogic Java Community Webinar #18 “How to Improve Web Application Perfor...GlobalLogic Java Community Webinar #18 “How to Improve Web Application Perfor...
GlobalLogic Java Community Webinar #18 “How to Improve Web Application Perfor...
 
Connector Corner: Seamlessly power UiPath Apps, GenAI with prebuilt connectors
Connector Corner: Seamlessly power UiPath Apps, GenAI with prebuilt connectorsConnector Corner: Seamlessly power UiPath Apps, GenAI with prebuilt connectors
Connector Corner: Seamlessly power UiPath Apps, GenAI with prebuilt connectors
 
Introducing BoxLang : A new JVM language for productivity and modularity!
Introducing BoxLang : A new JVM language for productivity and modularity!Introducing BoxLang : A new JVM language for productivity and modularity!
Introducing BoxLang : A new JVM language for productivity and modularity!
 
Day 2 - Intro to UiPath Studio Fundamentals
Day 2 - Intro to UiPath Studio FundamentalsDay 2 - Intro to UiPath Studio Fundamentals
Day 2 - Intro to UiPath Studio Fundamentals
 
Mutation Testing for Task-Oriented Chatbots
Mutation Testing for Task-Oriented ChatbotsMutation Testing for Task-Oriented Chatbots
Mutation Testing for Task-Oriented Chatbots
 
The Microsoft 365 Migration Tutorial For Beginner.pptx
The Microsoft 365 Migration Tutorial For Beginner.pptxThe Microsoft 365 Migration Tutorial For Beginner.pptx
The Microsoft 365 Migration Tutorial For Beginner.pptx
 
JavaLand 2024: Application Development Green Masterplan
JavaLand 2024: Application Development Green MasterplanJavaLand 2024: Application Development Green Masterplan
JavaLand 2024: Application Development Green Masterplan
 
Y-Combinator seed pitch deck template PP
Y-Combinator seed pitch deck template PPY-Combinator seed pitch deck template PP
Y-Combinator seed pitch deck template PP
 
"Scaling RAG Applications to serve millions of users", Kevin Goedecke
"Scaling RAG Applications to serve millions of users",  Kevin Goedecke"Scaling RAG Applications to serve millions of users",  Kevin Goedecke
"Scaling RAG Applications to serve millions of users", Kevin Goedecke
 
QR Secure: A Hybrid Approach Using Machine Learning and Security Validation F...
QR Secure: A Hybrid Approach Using Machine Learning and Security Validation F...QR Secure: A Hybrid Approach Using Machine Learning and Security Validation F...
QR Secure: A Hybrid Approach Using Machine Learning and Security Validation F...
 
"NATO Hackathon Winner: AI-Powered Drug Search", Taras Kloba
"NATO Hackathon Winner: AI-Powered Drug Search",  Taras Kloba"NATO Hackathon Winner: AI-Powered Drug Search",  Taras Kloba
"NATO Hackathon Winner: AI-Powered Drug Search", Taras Kloba
 
"What does it really mean for your system to be available, or how to define w...
"What does it really mean for your system to be available, or how to define w..."What does it really mean for your system to be available, or how to define w...
"What does it really mean for your system to be available, or how to define w...
 
Biomedical Knowledge Graphs for Data Scientists and Bioinformaticians
Biomedical Knowledge Graphs for Data Scientists and BioinformaticiansBiomedical Knowledge Graphs for Data Scientists and Bioinformaticians
Biomedical Knowledge Graphs for Data Scientists and Bioinformaticians
 
Apps Break Data
Apps Break DataApps Break Data
Apps Break Data
 
Harnessing the Power of NLP and Knowledge Graphs for Opioid Research
Harnessing the Power of NLP and Knowledge Graphs for Opioid ResearchHarnessing the Power of NLP and Knowledge Graphs for Opioid Research
Harnessing the Power of NLP and Knowledge Graphs for Opioid Research
 
inQuba Webinar Mastering Customer Journey Management with Dr Graham Hill
inQuba Webinar Mastering Customer Journey Management with Dr Graham HillinQuba Webinar Mastering Customer Journey Management with Dr Graham Hill
inQuba Webinar Mastering Customer Journey Management with Dr Graham Hill
 
"Frontline Battles with DDoS: Best practices and Lessons Learned", Igor Ivaniuk
"Frontline Battles with DDoS: Best practices and Lessons Learned",  Igor Ivaniuk"Frontline Battles with DDoS: Best practices and Lessons Learned",  Igor Ivaniuk
"Frontline Battles with DDoS: Best practices and Lessons Learned", Igor Ivaniuk
 

Twitter - Guest Lecture UC Berkeley CS10 Fall 2010