Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
MapReduce and Columnar DB's
Search
samant
April 02, 2014
Programming
0
1.4k
MapReduce and Columnar DB's
samant
April 02, 2014
Tweet
Share
More Decks by samant
See All by samant
Introduction to Firebase (May contain some pieces of AppGyver and Polymer)
samant
0
1.2k
Why Ruby on Rails? - Feweb - September 2014
samant
1
1.4k
Beloved JS - JavaScript…. What else?
samant
1
1.7k
WTF: OOCSS like a boss !
samant
7
1.5k
WTF: Document DBs
samant
0
2k
WTF: Rails App Templates
samant
2
2.8k
Other Decks in Programming
See All in Programming
Jakarta EE Meets AI
ivargrimstad
0
570
AIに安心して任せるためにTypeScriptで一意な型を作ろう
arfes0e2b3c
0
330
新世界の理解
koriym
0
130
GUI操作LLMの最新動向: UI-TARSと関連論文紹介
kfujikawa
0
360
プロダクトという一杯を作る - プロダクトチームが味の責任を持つまでの煮込み奮闘記
hiliteeternal
0
370
オホーツクでコミュニティを立ち上げた理由―地方出身プログラマの挑戦 / TechRAMEN 2025 Conference
lemonade_37
1
430
202507_ADKで始めるエージェント開発の基本 〜デモを通じて紹介〜(奥田りさ)The Basics of Agent Development with ADK — A Demo-Focused Introduction
risatube
PRO
6
1.4k
iOS開発スターターキットの作り方
akidon0000
0
230
一人でAIプロダクトを作るならAIにはもっと働いてもらいたい / I want AI to work harder
rkaga
2
170
実践 Dev Containers × Claude Code
touyu
1
120
新しいモバイルアプリ勉強会(仮)について
uetyo
1
250
バイブコーディング超えてバイブデプロイ〜CloudflareMCPで実現する、未来のアプリケーションデリバリー〜
azukiazusa1
3
780
Featured
See All Featured
BBQ
matthewcrist
89
9.8k
Docker and Python
trallard
45
3.5k
Large-scale JavaScript Application Architecture
addyosmani
512
110k
Facilitating Awesome Meetings
lara
54
6.5k
Being A Developer After 40
akosma
90
590k
Making the Leap to Tech Lead
cromwellryan
134
9.5k
Building Flexible Design Systems
yeseniaperezcruz
328
39k
JavaScript: Past, Present, and Future - NDC Porto 2020
reverentgeek
50
5.5k
Understanding Cognitive Biases in Performance Measurement
bluesmoon
29
1.8k
Helping Users Find Their Own Way: Creating Modern Search Experiences
danielanewman
29
2.8k
Balancing Empowerment & Direction
lara
1
530
Navigating Team Friction
lara
188
15k
Transcript
MapReduce and Columnar DB’s Amant Stéphane @stephamant
Summary • MapReduce • Columnar DB’s • Practical Use Case
MapReduce
MapReduce - Definition • One of Google’s greatest contributions to
computer science • MapReduce is an algorithmic framework for executing jobs in parallel over several nodes
MapReduce
MapReduce
MapReduce - Major Implementation • Almost always based on Hadoop
- a Framework for the storage and processing of large scaled and distributed data supported by Apache • Itself inspired by Google BigTable Project
Columnar DB’s
Columnar DB’s - Definition Columnar databases are so named because
the important aspect of their design is that data from a given column is stored together. (By contrast, a row-oriented database keeps information about a row together.) In column-oriented databases, adding columns is quite inexpensive.
Columnar DB’s - Definition
Columnar DB’s - Definition
Columnar DB’s - Queries get ‘t1′, ‘r1′, {COLUMN => ‘c1′}
get ‘t1′, ‘r1′, {COLUMN => ['c1', 'c2', 'c3']} get ‘t1′, ‘r1′, {COLUMN => ‘c1′, TIMESTAMP => ts1} get ‘t1′, ‘r1′, {COLUMN => ‘c1′, TIMERANGE => [ts1, ts2], VERSIONS => 4} get ‘t1′, ‘r1′, {COLUMN => ‘c1′, TIMESTAMP => ts1, VERSIONS => 4}
Columnar DB’s - Major Implementation • Cassandra • Hypertable •
HBase
Columnar DBs - Supporting Companies • Facebook • Yahoo •
Ebay • Twitter • Amazon • Google • ...
Columnar DB’s - Pro’s • Horizontal scalability (replication and partitioning)
• Versioning is trivial • No real storage cost for null values • Used mainly for Big Data / data mining / Business Intelligence analysis
Columnar DB’s - Con’s • Complexity (Installation, infrastructure and usage)
• Design your schema based on how you plan to query the data • Some operations are really time expensive
Practical Use Case
Facebook Messaging Index Table Keyword #1 Keyword #2 Keyword #3
Keyword #... User ID #1 User ID #2 User ID #... Timestamp Message_id Timestamp Message_id Timestamp Message_id Timestamp Message_id Timestamp Message_id Timestamp Message_id Timestamp Message_id Timestamp Message_id Timestamp Message_id Timestamp Message_id Timestamp Message_id Timestamp Message_id
References Seven Databases in Seven Weeks: A Guide to Modern
Databases and the NoSQL Movement by Eric Redmond and Jim R. Wilson
Thank you