Starting from caching concepts I will jump quickly in to available Nginx caching directives. I will explain why they are useful and how you can profit from them. Armored with this knowledge we will fight our way through a real world Nginx caching example. Get the full Nginx caching tutorial on my blog: http://czerasz.com/2015/03/30/nginx-caching-tutorial/

1. You Can Run Faster!
Caching with .

2. Introduction

4. The Caching Concept

5. Initial Situation

6. The Caching Concept

7. The Caching Concept

8. The Caching Concept

9. The Caching Concept

10. Caching with Nginx

11. Caching with Nginx

12. Caching with Nginx

20. Nginx Cache Configuration

21. Configuration - Available Directives
proxy_cache_path /data/nginx/cache keys_zone=zone_name_one:10m;
proxy_cache zone_name_one;

22. Configuration - Available Directives
proxy_cache_path /data/nginx/cache keys_zone=one:10m max_size=200m;
proxy_cache_path /data/nginx/cache keys_zone=one:10m inactive=60m;

23. Configuration - Available Directives
proxy_cache_path /data/nginx/cache levels=1:2 keys_zone=one:10m;

24. Quiz

25. Quiz - Solution
proxy_cache_path /data/nginx/cache levels=2:4 keys_zone=one:10m;

26. What/When to cache?
proxy_cache_methods GET HEAD POST;
proxy_cache_min_uses 5;
proxy_cache_revalidate on;

27. How to cache?
proxy_cache_key "$host$request_uri$cookie_user";
proxy_cache_key "$scheme$proxy_host$uri$is_args$args";

28. How to generate a Nginx
cache hash key?
echo -n "httpczerasz.com/time.php" | md5sum

29. When not to cache?
proxy_no_cache $http_pragma $http_authorization $cookie_nocache $arg_nocache;

30. How long to cache?
proxy_cache_valid any 1m;
proxy_cache_valid 200 302 10m;

31. How long to cache?

32. Other Configuration Options
proxy_cache_use_stale error timeout;
proxy_cache_lock on;
proxy_temp_path /tmp/custom_cache/;

33. Debugging Nginx's Cache

34. Debugging Nginx's Cache
map $remote_addr $cache_status {
127.0.0.1 $upstream_cache_status;
default "";
}
...
add_header X-Cache-Status $cache_status;

35. MISS Object was not found in the cache. Response was served from the origin.
Response may have been saved to cache.
BYPASS Got response from upstream. Response may have been saved to cache.
EXPIRED Cached object has expired. Response was served from the upstream.
STALE Object served from cache because of issues with origin server response
UPDATING Serve stale content from cache because proxy_cache_lock has timed out
and proxy_use_stale takes control
REVALIDATED proxy_cache_revalidate verified that the current cached content was still
valid
HIT The object was found in the cache and it is served from there

36. Cache Loader
proxy_cache_path /data/nginx/cache keys_zone=one:10m [loader_files=number] [loader_sleep=time] [loader_threshold=time];

37. Cache Manager
proxy_cache_path /data/nginx/cache keys_zone=one:10m max_size=200m;

38. Example
How to create a small CDN with Nginx?

40. Muchas Gracias