Upgrade to Pro — share decks privately, control downloads, hide ads and more …

Varnish to the Rescue

Avatar for Leszek Krupiński Leszek Krupiński
April 11, 2014
Technology
0
130

Varnish to the Rescue

Introduction to Varnish. Basics & pitfalls. Presented at techfusion.io

Avatar for Leszek Krupiński

Leszek Krupiński

April 11, 2014
Tweet

More Decks by Leszek Krupiński

See All by Leszek Krupiński
So that the daemon won’t die
Avatar for Leszek Krupiński leafnode
2
400
Practical PHP7
Avatar for Leszek Krupiński leafnode
2
460
Dobrze posól swoje hasło
Avatar for Leszek Krupiński leafnode
0
110
Dobrze posól swoje hasło (z notatkami)
Avatar for Leszek Krupiński leafnode
0
94
PHPNG kontra HHVM
Avatar for Leszek Krupiński leafnode
0
100
PHPNG kontra HHVM (z notatkami)
Avatar for Leszek Krupiński leafnode
0
69
Ewolucja PHP: PHP 5.6, NG, PHP 7, HHVM
Avatar for Leszek Krupiński leafnode
2
300
Sculpin - Generowanie statycznych stron w PHP
Avatar for Leszek Krupiński leafnode
2
62
Skalowanie aplikacji PHP
Avatar for Leszek Krupiński leafnode
1
410

Other Decks in Technology

See All in Technology
Trust as Infrastructure
Avatar for Bryan Cantrill bcantrill
0
340
後進育成のしくじり〜任せるスキルとリーダーシップの両立〜
Avatar for mtskhs matsu0228
7
2.4k
SwiftUIのGeometryReaderとScrollViewを基礎から応用まで学び直す：設計と活用事例
Avatar for Fumiya Sakai fumiyasac0921
0
140
組織観点から IAM Identity CenterとIAMの設計を考える
Avatar for NRI Netcom nrinetcom
PRO
1
180
M5製品で作るポン置きセルラー対応カメラ
Avatar for Hisaya OKADA sayacom
0
150
AI駆動開発を推進するためにサービス開発チームで 取り組んでいること
Avatar for おーしろ noayaoshiro
0
180
10年の共創が示す、これからの開発者と企業の関係 ～ Crossroad
Avatar for SORACOM soracom
PRO
1
190
定期的な価値提供だけじゃない、スクラムが導くチームの共創化 / 20251004 Naoki Takahashi
Avatar for SHIFT EVOLVE shift_evolve
PRO
3
300
実装で解き明かす並行処理の歴史
Avatar for ZOZO Developers zozotech
PRO
1
340
バイブコーディングと継続的デプロイメント
Avatar for nwiizo nwiizo
2
430
Azure SynapseからAzure Databricksへ 移行してわかった新時代のコスト問題！？
Avatar for Databricks Japan databricksjapan
0
140
20250929_QaaS_vol20
Avatar for Shin Murakami mura_shin
0
110

Featured

See All Featured
How to Ace a Technical Interview
Avatar for Jacob Kaplan-Moss jacobian
280
24k
Build your cross-platform service in a week with App Engine
Avatar for Jose L jlugia
232
18k
Building Adaptive Systems
Avatar for Chris Keathley keathley
43
2.8k
How to Think Like a Performance Engineer
Avatar for Harry Roberts csswizardry
27
2k
Improving Core Web Vitals using Speculation Rules API
Avatar for Sergey Chernyshev sergeychernyshev
19
1.2k
Sharpening the Axe: The Primacy of Toolmaking
Avatar for Bryan Cantrill bcantrill
45
2.5k
Dealing with People You Can't Stand - Big Design 2015
Avatar for Cassini Nazir cassininazir
367
27k
The World Runs on Bad Software
Avatar for Brandon Keepers bkeepers
PRO
71
11k
The Success of Rails: Ensuring Growth for the Next 100 Years
Avatar for Eileen M. Uchitelle eileencodes
46
7.6k
Understanding Cognitive Biases in Performance Measurement
Avatar for Philip Tellis bluesmoon
29
2.6k
Intergalactic Javascript Robots from Outer Space
Avatar for Vicent Martí tanoku
273
27k
The Pragmatic Product Professional
Avatar for Laura Van Doore lauravandoore
36
6.9k

Transcript

  1. Varnish to the rescue Leszek Krupiński

  2. @leafnode PHPers Manual Consultant Architect

  3. intro

  4. web 1. User 2. Browser 3. Server

  5. user is impatient

  6. fast!

  7. 100ms

  8. 1s = -11% Page Views -16% User Satisfaction -7% Conversion

  9. 1-5s ! 32% consumers lost

  10. (2012) average: 2.45s

  11. Optimize application

  12. • Frameworks • Limits • Time-consuming operations • Cost

  13. Maybe it’s not needed?

  14. Cache!

  15. Many levels, many solutions

  16. But… my site is very dynamic!

  17. 1s TTL

  18. From 20 rq/s to 1 rq/s in single apt-get install

  19. Fresh content takes most hits

  20. Varnish The Web Accelerator

  21. None
  22. None
  23. None

  24. Architecture

  25. Works with the kernel not against it

  26. mmap, threads, epoll, kqueue

  27. Backends: memory, file

  28. If it fits in memory, use memory

  29. Works on HTTP headers

  30. Cache-control, If-Modified-Since, Expires, Pragma, If-None-Match, Etag, Vary, Age

  31. Varnish uses language both browser and backend know

  32. In-memory logs

  33. 75 000 rq/s at TMECC 143 000 rq/s at Redpill-Linpro

  34. Do I need a lot of memory?

  35. Nope

  36. Fresh content takes most hits

  37. Take that, slashdot effect!

  38. Configuration

  39. Lots of possibilities

  40. Unfortunately, lots of possibilities

  41. Varnish Configuration Language

  42. Compiled directly to C

  43. Hook-like configuration

  44. vcl_fetch vcl_recv vcl_hit vcl_miss vcl_hash vcl_pass vcl_deliver vcl_error

  45. None

  46. restart

  47. Objects req, bereq, resp, beresp, obj

  48. Defaults

  49. vcl_recv

  50. None
  51. None
  52. None

  53. vcl_hash

  54. None

  55. VMods

  56. throttle, cookie, shield, redis, memcached, curl, url code, redirect…

  57. Varnish: load balancer failover system

  58. None

  59. Directors

  60. Default: random

  61. Round-robin, client, hash, dns

  62. Health check

  63. None

  64. Saint mode

  65. Grace mode

  66. Two hard things

  67. Invalidate cache

  68. Ban list Efficient way to invalidate cache

  69. Over HTTP

  70. Use PURGE header

  71. None
  72. None
  73. None

  74. Real life issues

  75. Cookies

  76. Varnish does not cache when cookies are involved

  77. Ignore cookies

  78. None

  79. Pick cookies

  80. None

  81. Pick URLs

  82. None

  83. Redirects

  84. POST

  85. PHP sessions

  86. CURL VMod

  87. None
  88. None

  89. PHP + memcached

  90. None

  91. mobile detection

  92. None

  93. mobile detection II

  94. None

  95. VMod: DeviceAtlas Mobile Detection

  96. Cache “one-time” data

  97. Example: dynamic image resizing

  98. 1B pictures 10 sizes

  99. apache + moddims

  100. Fresh content takes most hits

  101. Different TTL for different parts?

  102. ESI!

  103. None
  104. None

  105. Testing?

  106. jQuery plugin

  107. Just in! Varnish 4.0

  108. Log query language, background fetch, byte counters, security improvements

  109. http://speakerdeck.com/leafnode