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
Varnish: How We Do It
Search
Matt Robenolt
June 01, 2015
Technology
1
220
Varnish: How We Do It
SF Varnish Meetup
June 1st, 2015
Matt Robenolt
June 01, 2015
Tweet
Share
More Decks by Matt Robenolt
See All by Matt Robenolt
Everything is broken and I don't know why.
mattrobenolt
0
44
I am bad at my job.
mattrobenolt
0
200
Everything is broken, and I don't know why. Python edition.
mattrobenolt
1
200
Everything is broken, and I don't know why. Python edition.
mattrobenolt
2
580
Everything is broken, and I don't know why.
mattrobenolt
7
1.5k
Cheating Your Way to Webscale
mattrobenolt
13
1.4k
HTTP for Great Good
mattrobenolt
85
200k
Caching is Hard: Varnish @ Disqus
mattrobenolt
52
2.1M
Developing & Deploying "Large" Scale Web Applications
mattrobenolt
25
1.3k
Other Decks in Technology
See All in Technology
AWSにおけるTrend Vision Oneの効果について
shimak
0
120
PLaMo2シリーズのvLLM実装 / PFN LLM セミナー
pfn
PRO
2
970
許しとアジャイル
jnuank
1
120
データエンジニアがこの先生きのこるには...?
10xinc
0
440
「Verify with Wallet API」を アプリに導入するために
hinakko
1
230
Access-what? why and how, A11Y for All - Nordic.js 2025
gdomiciano
1
110
【新卒研修資料】LLM・生成AI研修 / Large Language Model・Generative AI
brainpadpr
23
17k
GopherCon Tour 概略
logica0419
2
190
Pure Goで体験するWasmの未来
askua
1
180
BirdCLEF+2025 Noir 5位解法紹介
myso
0
190
AI ReadyなData PlatformとしてのAutonomous Databaseアップデート
oracle4engineer
PRO
0
170
SREとソフトウェア開発者の合同チームはどのようにS3のコストを削減したか?
muziyoshiz
1
100
Featured
See All Featured
Thoughts on Productivity
jonyablonski
70
4.9k
BBQ
matthewcrist
89
9.8k
Exploring the Power of Turbo Streams & Action Cable | RailsConf2023
kevinliebholz
34
6.1k
Facilitating Awesome Meetings
lara
56
6.6k
It's Worth the Effort
3n
187
28k
Rebuilding a faster, lazier Slack
samanthasiow
84
9.2k
Cheating the UX When There Is Nothing More to Optimize - PixelPioneers
stephaniewalter
285
14k
Building Flexible Design Systems
yeseniaperezcruz
329
39k
Imperfection Machines: The Place of Print at Facebook
scottboms
269
13k
Music & Morning Musume
bryan
46
6.8k
Practical Tips for Bootstrapping Information Extraction Pipelines
honnibal
PRO
23
1.5k
Bash Introduction
62gerente
615
210k
Transcript
Varnish: How we do it SF Varnish Meetup June 1st
2015 Matt Robenolt
Hello < me irl
Lead Operations Engineer
First Generation edge (haproxy) shield app (python) Failover
Why this sucked
Duplicate routing logic Complex Caching logic WasteD RAM for failover
Why this sucked
Failover == lose all cache Varnish held cache rules Hard
to add/remove backends Why this sucked
Current Generation edge shield app (python)
Why this is rad
App owns all caching logic Unified request routing Utilize RAM
from all nodes Why this is rad
If-Modified-Since Vary on cookie values Less deploys to Varnish Why
this is rad
60,000 15,000 13,000 Caching funnel edge shield app
edge shield app Onion skin view
edge shield app recv pass fetch hit miss hash synth
fetch deliver error Onion skin view
edge 60,000 req/s
edge Closest to users (geographically) Absorbs most traffic Blocks abuse
60,000 req/s
edge Makes decisions for shield Sort querystrings (boltsort/std) Promote cookies
to headers 60,000 req/s
Cookies. as headers? Why?
Vary: Cookie-sessionid
shield 15,000 req/s
shield Routing to app backends Serve stale content (grace) Do
If-modified-Since 15,000 req/s
shield Parse response cache rules Backend healthchecks Store lots of
content 15,000 req/s
application 13,000 req/s
application Declare response cache rules Respond to If-modified-Since 13,000 req/s
WaiT. 13,000 req/s still?
46% 53% 1% App Response Codes
46% 53% 1% App Response Codes 304 200
miss Hit Hit/update If-Modified-Since Hit/IMS 200 OK 200 OK 304
Not Modified v1 v2
tl;dr 60k req -> 7k at app Every request thru
Varinsh Complex logic written once
tl;dr App has complete control We still <3 haproxy Each
layer worth deep dive
We’re hiring people who hate comptuers. disqus.com/jobs
Check it. HTTP for Great Good speakerdeck.com/mattrobenolt/http-for-great-good Cheating Your Way
to #webscale speakerdeck.com/mattrobenolt/cheating-your-way-to-webscale
Questions? I have answers. ^ github.com/mattrobenolt @mattrobenolt some