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
Introduction to RethinkDB : Move fast and break...
Search
Jorge Silva
August 06, 2015
Programming
2
260
Introduction to RethinkDB : Move fast and break things
Jorge Silva
August 06, 2015
Tweet
Share
More Decks by Jorge Silva
See All by Jorge Silva
ForwardJS - RethinkDB - Getting Started
thejsj
0
200
ForwardJS - RethinkDB - Advanced Queries
thejsj
1
200
Automatic Failover in RethinkDB
thejsj
0
220
Workshop: Introduction to RethinkDB : Santa Cruz JS
thejsj
1
120
Push databases: A better way to build realtime apps
thejsj
0
120
Data Modeling in RethinkDB
thejsj
4
270
RethinkDB+Angular.js: Building realtime web applications
thejsj
10
30k
Introduction to RethinkDB: 1KE Meetup
thejsj
0
48
Introduction to RethinkDB : Hack Reactor
thejsj
4
410
Other Decks in Programming
See All in Programming
Porting a visionOS App to Android XR
akkeylab
0
680
生成AI時代のコンポーネントライブラリの作り方
touyou
1
290
MCPを使ってイベントソーシングのAIコーディングを効率化する / Streamlining Event Sourcing AI Coding with MCP
tomohisa
0
170
ご注文の差分はこちらですか? 〜 AWS CDK のいろいろな差分検出と安全なデプロイ
konokenj
3
580
ISUCON研修おかわり会 講義スライド
arfes0e2b3c
1
470
ソフトウェア設計とAI技術の活用
masuda220
PRO
17
3.5k
チームのテスト力を総合的に鍛えて品質、スピード、レジリエンスを共立させる/Testing approach that improves quality, speed, and resilience
goyoki
5
1.1k
20250708_JAWS_opscdk
takuyay0ne
2
130
A full stack side project webapp all in Kotlin (KotlinConf 2025)
dankim
0
150
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
0
330
Azure AI Foundryではじめてのマルチエージェントワークフロー
seosoft
0
200
初学者でも今すぐできる、Claude Codeの生産性を10倍上げるTips
s4yuba
16
13k
Featured
See All Featured
ReactJS: Keep Simple. Everything can be a component!
pedronauck
667
120k
Into the Great Unknown - MozCon
thekraken
40
1.9k
Music & Morning Musume
bryan
46
6.7k
Designing Dashboards & Data Visualisations in Web Apps
destraynor
231
53k
Unsuck your backbone
ammeep
671
58k
Evolution of real-time – Irina Nazarova, EuRuKo, 2024
irinanazarova
8
830
Product Roadmaps are Hard
iamctodd
PRO
54
11k
The Myth of the Modular Monolith - Day 2 Keynote - Rails World 2024
eileencodes
26
2.9k
Learning to Love Humans: Emotional Interface Design
aarron
273
40k
Scaling GitHub
holman
460
140k
XXLCSS - How to scale CSS and keep your sanity
sugarenia
248
1.3M
A Tale of Four Properties
chriscoyier
160
23k
Transcript
Push databases, RethinkDB, and building realtime apps Move Fast and
Break Things San Francisco, CA August 5, 2015
Jorge Silva Developer Evangelist @ RethinkDB @thejsj
Preface The realtime web
Realtime apps
Realtime apps
Realtime apps • More and more apps are built to
be realtime • Users have come to want and expect this behavior in their apps • Building realtime apps is hard
Building realtime apps is hard • You can keep everything
in a single server • You can poll the database to keep track of updates • You can publish updates through a message broker
Building realtime apps is hard • All solutions present a
tradeoff between scalability and complexity • It’s hard to keep track of state in realtime architectures
Introduction What is RethinkDB?
What is RethinkDB? • Open source database for building realtime
web applications • NoSQL database that stores schemaless JSON documents • Distributed database that is easy to scale
Push Database • Subscribe to change notifications from database queries
(changefeeds) • No more polling — the database pushes changes to your app • Reduce the amount of plumbing needed to stream live updates
Push Database • Having your database push changes keeps your
database as the central source of truth • Having a central source of truth simplifies your architecture
Push Database RethinkDB is an excellent database for: • Collaborative
web and mobile apps • Multiplayer games • Streaming analytics apps • Connected devices
Introduction to ReQL RethinkDB Query Language
Introduction to ReQL • ReQL embeds natively into your programming
language • Compose ReQL queries by chaining commands
Anatomy of a ReQL Query r.table("users") .pluck("last_name") .distinct().count() Number of
unique last names
Anatomy of a ReQL Query r.table("users") .pluck("last_name") .distinct().count() Access a
database table
Anatomy of a ReQL Query r.table("users") .pluck("last_name") .distinct().count() Isolate a
document property
Anatomy of a ReQL Query r.table("users") .pluck("last_name") .distinct().count() Consolidate duplicate
values
Anatomy of a ReQL Query r.table("users") .pluck("last_name") .distinct().count() Display the
number of items
Sample ReQL Queries r.table("users") .filter(r.row("age").gt(30)) r.table(“post") .eqJoin(“uId”, r.table(“users”)) .zip() r.table("fellowship")
.filter({species: "hobbit"}) .update({species: "halfling"})
Additional ReQL Features • Geospatial indexing for location- based queries
• Date and time functions • Support for storing binary objects • Execute http requests using r.http
Realtime Updates Working with Changefeeds
Subscribe to change notifications on database queries Changefeeds
r.table("users").changes() Track changes on the users table Changefeeds
Changefeeds • The changes command returns a cursor that receives
updates • Each update includes the new and old value of the modified record
Changefeeds r.table("users").changes() r.table("users") .insert({name: "Bob"}) Changefeed output: { new_val: {
id: '362ae837-2e29-4695-adef-4fa415138f90', name: 'Bob', ... }, old_val: null }
Changefeeds r.table("users").changes() r.table("users") .filter({name: "Bob"}).delete() Changefeed output: { new_val: null,
old_val: { id: '362ae837-2e29-4695-adef-4fa415138f90', name: 'Bob', ... } }
Changefeeds r.table("users").changes() r.table("users") .get("362ae837-2e29-4695-adef-4fa415138f90") .update({name: "Bobby"}) Changefeed output: { new_val:
{ id: '362ae837-2e29-4695-adef-4fa415138f90', name: 'Bobby' }, old_val: { id: '362ae837-2e29-4695-adef-4fa415138f90', name: 'Bob' } }
Changefeeds r.table("players") .orderBy({index: r.desc("score")}) .limit(3).changes() Track top three players by
score Chain the changes command to an actual ReQL query:
Questions http://questions.rethinkdb.com
Summary • Keeping track of state in realtime apps is
hard • RethinkDB solves this problem by pushing changes to your app • In the future, we'll see more database that use the push model
Questions • RethinkDB website: http://rethinkdb.com • Install RethinkDB: http://rethinkdb.com/install/ •
Email me:
[email protected]
• Tweet: @thejsj, @rethinkdb