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
The Node.js Scalability Myth
Search
Felix Geisendörfer
May 02, 2012
Technology
4
1.5k
The Node.js Scalability Myth
Presentation given on 26.04.2012 at MixIT conference in Lyon, France.
Felix Geisendörfer
May 02, 2012
Tweet
Share
More Decks by Felix Geisendörfer
See All by Felix Geisendörfer
tus.io - Resumable File Uploads (Lightning Talk)
felixge
2
700
Programming flying robots with JavaScript
felixge
2
870
Programming flying robots with JavaScript
felixge
0
530
Programming an AR Drone Firmware with JS (de)
felixge
1
570
Faster than C?
felixge
1
1.2k
Flying robots over a 10.000 mile distance with JavaScript.
felixge
0
430
Faster than C?
felixge
1
540
The power of node.js (with quadcopters)
felixge
0
440
Faster than C?
felixge
0
360
Other Decks in Technology
See All in Technology
【基調講演】変える、今ここから ― IoTとAIで紡ぐ未来
soracom
PRO
0
320
ソフトウェアエンジニアリングの知見を活かして データ基盤をいい感じにする on Snowflake [MIERUNE BBQ #10]
mtpooh
2
150
技術負債による事業の失敗はなぜ起こるのか / Why do business failures due to technical debt occur?
i35_267
0
190
Classmethod流のPlatform Engineering / classmethod-platform-engineering-devio2024
tomoki10
0
480
累計ダウンロード数1億8000万を超えるアプリケーションプラットフォームのレガシーシステム脱却とモダン化への道
kmitsuhashi
0
120
クラウド利用者の「責任」をどう果たす?AWSセキュリティ対策のススメ #AWSSummit
hiashisan
0
280
Amazon FSx for NetApp ONTAPのパフォーマンスチューニング要素をまとめてみた #cm_odyssey #devio2024
non97
0
220
「我々はどこに向かっているのか」を問い続けるための仕組みづくり / Establishing a System for Continuous Inquiry about where we are
daitasu
0
170
VPoEの視点から見た、ヘンリーがサーバーサイドKotlinを使う理由 / Why Server-side Kotlin 2024
cho0o0
1
420
OSSコミットしてZennの課題を解決した話
dyoshikawa1993
0
150
エンジニアリングマネージャーはどう学んでいくのか #devsumi / How Do Engineering Managers Continue to Learn and Grow?
expajp
4
1.3k
ペパボのオブザーバビリティ研修2024 説明資料
kesompochy
0
1.1k
Featured
See All Featured
Creating an realtime collaboration tool: Agile Flush - .NET Oxford
marcduiker
16
1.6k
Distributed Sagas: A Protocol for Coordinating Microservices
caitiem20
325
21k
GraphQLの誤解/rethinking-graphql
sonatard
59
9.6k
The Language of Interfaces
destraynor
151
23k
The MySQL Ecosystem @ GitHub 2015
samlambert
248
12k
Making the Leap to Tech Lead
cromwellryan
127
8.7k
BBQ
matthewcrist
82
9k
How GitHub Uses GitHub to Build GitHub
holman
471
290k
GraphQLとの向き合い方2022年版
quramy
36
13k
Visualization
eitanlees
139
14k
Learning to Love Humans: Emotional Interface Design
aarron
269
39k
The World Runs on Bad Software
bkeepers
PRO
63
11k
Transcript
The Node.js Scalability Myth Felix Geisendörfer 26.04.2012 at MixIT Conference
(Lyon, France)
(@)felixge(.de)
core contributor
transloadit.com (using node since v0.0.6)
History
Ryan Dahl starts the node project (first commit) Feb 16,
2009
Discovered node.js (v0.0.6) ~June, 2009
None
Core Contributor & Module Author node-mysql node-formidable + 30 other
modules
Isaac Schlueter starts the npm package manager (first commit) Sep
29, 2009
Ryan’s talk at JSConf.EU gets people excited about node Nov
7, 2009
(c) @substack Jan 30, 2012 Ryan appoints Isaac to lead
node.js
Topic of this Talk
I need to build an über-scalable web service. It will
be the next big thing!
Easy! I will use node.js and MongoDB!
Easy! I will use node.js and MongoDB!
Because node.js is “scalable”, right?
None
Audience?
Node.js?
Are you measuring app performance in production?
1000 req / s
100 req / s
10 req / s
10 requests / per second = 864000 requests / day
10 req / s
The End?
I REALLY need to build an über-scalable web service!!11!1
Scalability
(c) @substack
The Node.js Scalability Myth • Threads don’t scale • Event
loops do
The Node.js Scalability Myth • Threads don’t scale • Event
loops do (Probably) not true in 2012 (Very likely) not relevant
More relevant • Understanding your tools • Using the right
tool for the job
Node’s Concurrency Model
Node’s Concurrency Model 1 var http = require('http'); 2 3
http.createServer(function(req, res) { 4 res.end('Hello World'); 5 }).listen(8080); server.js
Node’s Concurrency Model $ node server.js
Node’s Concurrency Model • Node loads server.js from disk ->
v8 compiles & executes • listen() allocates and binds a file descriptor • Event Loops starts running
Node’s Concurrency Model 1 while (true) { 2 int r
= select(nfds, readfds, writefds, errorfds, 0); 3 if (r === 0) { 4 continue; 5 } 6 7 // Figure out which fds had activity, accept() on server fds, read() on // connection fds, write() queued writes 8 } Abstracted by libuv Different on Windows
Node’s Concurrency Model • Cooperative multitasking • Low memory usage
• Fast / efficient • Simple (compared to threads)
Vertical Scalability
Adding more resources to a single node
Vertical Scalability • CPU • GPUs • Memory • Disk
• Network
CPU
CPU (v8) • V8 compiles JS to Assembly • Just-in-time
compilation (JIT) • Does pretty well in those language benchmarks
Computers of the future will have hundreds of cores!
CPU • Node is single threaded (runs on a single
CPU) • No shared memory
But ...
Does your problem require shared memory?
If yes: Don’t use node
And: Good Luck
If no: child_process.fork()
Redis / ZeroMQ are your friends
GPUs
GPUs • No support in node itself • node-cuda addon
by Kashif Rasul
Memory
Memory • No hard memory limit on 64 bit (since
node-0.6 / v8-3.7) • JS is a garbage collected language (avoid huge heaps) • Buffers do not count towards heap
Network
Network • Node’s concurrency model is optimized for networking •
Good at fully saturating available network resources
Disk
Disk • Done in thread pool • Unfortunately along with
DNS at this point • Throughput ok, but not ideal yet • sendfile() not working yet
Does node scale vertically?
Yeah, good enough
Horizontal Scalability
Adding more nodes to a system
Bad News
Node.js has no horizontal scaling features
Even worse
This s#@t is really hard
Problems • De-coupling / encapsulation • CAP Theorem • System
Automation
...
Good Luck
One tip
Monitor & Measure! • Collect: node-measured, statsd, ... • Analyze:
Graphite, Librato Metrics, ... • Debug
So if node doesn’t have magic scaling, what is it
good for?
<Live Coding>
tl;dr • Know your requirements • There are no silver
bullets
Questions? Slides will be available at felixge.de
Thanks
Feedback