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Scaling NodeJS beyond the ordinary
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Abhinav Rastogi
March 02, 2018
Technology
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300
Scaling NodeJS beyond the ordinary
These are the slides to accompany the talk I gave at JSConf Iceland 2018.
Abhinav Rastogi
March 02, 2018
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Transcript
Scaling NodeJS Beyond the ordinary Abhinav Rastogi Lead UI Engineer
_abhinavrastogi
None
150M Registered Users 500K Phones sold in 15 seconds 200M
Visits over 5 days during annual sale event
– Andre Bondi “Scalability is the capability of a system
to handle a growing amount of work, or its potential to be enlarged to accommodate that growth.”
Why should it concern the JS community?
Why should it concern the JS community? • JS is
running on servers now • Failure is shifting to application code • Failure is better handled by devs
Types of Scalability x y z Add more machines Add
more resources Application layer
Horizontal Scaling
Horizontal Scaling Machine Node API
Horizontal Scaling Machine Node API Machine Node ELB
Vertical Scaling
Vertical Scaling Machine Node API
Vertical Scaling Machine Node API Node ??
Application Layer Optimisations
The Optimisation Cycle Load Test Find Bottleneck Fix Issues
network, cpu, memory, disk
network bandwidth
network bandwidth
1000 kb per page 100 rps per machine 100 machines
= 10gbps
compression
const app = express() app.use(compression)
co-hosted nginx
co-hosted nginx Machine Node Node PM2 nginx API ELB
network profiling
netstat / ss lsof watch
everything is a file in unix!
ulimit
ulimit core file size (blocks, -c) 0 file size (blocks,
-f) unlimited pending signals (-i) 32767 max locked memory (kbytes, -l) 32 max memory size (kbytes, -m) unlimited open files (-n) 1024 max user processes (-u) 50
increase the limits / reduce the usage
keep-alive header
keep-alive header Object.assign(headers, { 'Connection': 'keep-alive', 'Keep-Alive': 'timeout=200' });
connection pooling
connection pooling const http = require('http'); fetch(url, { agent: new
http.Agent({ keepAlive: true, maxSockets: 24 }) });
ephemeral ports
tcp connection states
tcp connection states source: http://cnp3book.info.ucl.ac.be/1st/html/transport/transport.html
tcp connection states
cpu
cpu profiling
node --prof app.js
import crypto from 'crypto'; app.get('/auth', (req, res) => { const
hash = crypto.pbkdf2Sync(password, users[username].salt, 100, 512); if (users[username].hash.toString() === hash.toString()) { res.sendStatus(200); } else { res.sendStatus(401); } });
[Summary]: ticks total nonlib name 79 0.2% 0.2% JavaScript 36703
97.2% 99.2% C++ 7 0.0% 0.0% GC 767 2.0% Shared libraries 215 0.6% Unaccounted
[C++]: ticks total nonlib name 19557 51.8% 52.9% node::crypto::PBKDF2(v8) 4510
11.9% 12.2% _sha1_block_data_order 3165 8.4% 8.6% _malloc_zone_malloc
None
$ npm install -g 0x $ 0x app.js
None
disk
memory
real-time monitoring
load, profile, fix, repeat!
thank you @_abhinavrastogi http://tiny.cc/scalingnodejs