Caching Algorithms, NGINX, with help from the NGINX Community, Medium, GPT, OReilly

caching_algorithms.nginx.conf

# Base
server {
    list 8080:
    server_name localhost;

    location / {
        proxdy_pass $BACKEND_URL;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_cache_bypass $http_upgrade;
        proxy_cache_revalidate on;
        proxy_cache_valid 200 302 10m;
        add_header X-Cache-Status $upstream_cache_status;
    }
}

### Least Time
# proxy_cache_path /path/to/cache levels=1:2 keys_zone=my_cache:10m inactive=60m use_temp_path=off;
# proxy_cache_key "$scheme$request_method$host$request_uri";
# proxy_cache_valid 200 1h;
# proxy_cache_valid 404 1m;
# proxy_cache_min_uses 1;
# proxy_cache_use_stale error timeout invalid_header updating http_500 http_502 http_503 http_504;

### Least Connections
# proxy_cache_path /path/to/cache levels=1:2 keys_zone=my_cache:10m inactive=60m use_temp_path=off;
# proxy_cache_key "$scheme$request_method$host$request_uri";
# proxy_cache_valid 200 1h;
# proxy_cache_valid 404 1m;
# proxy_cache_min_uses 1;
# proxy_cache_use_stale error timeout invalid_header updating http_500 http_502 http_503 http_504;
# proxy_cache_lock on;
# proxy_cache_lock_timeout 5s;
# proxy_cache_lock_age 5s;

### LRU ###
# proxy_cache_path /path/to/cache levels=1:2 keys_zone=my_cache:10m inactive=60m use_temp_path=off;
# proxy_cache_key "$scheme$request_method$host$request_uri";
# proxy_cache_valid 200 1h;
# proxy_cache_valid 404 1m;
# proxy_cache_min_uses 1;
# proxy_cache_use_stale error timeout invalid_header updating http_500 http_502 http_503 http_504;
# proxy_cache_revalidate on;
# proxy_cache_background_update on;

### LFU ###
# proxy_cache_path /path/to/cache levels=1:2 keys_zone=my_cache:10m inactive=60m use_temp_path=off;
# proxy_cache_key "$scheme$request_method$host$request_uri";
# proxy_cache_valid 200 1h;
# proxy_cache_valid 404 1m;
# proxy_cache_min_uses 1;
# proxy_cache_use_stale error timeout invalid_header updating http_500 http_502 http_503 http_504;
# proxy_cache_revalidate on;
# proxy_cache_background_update on;
# proxy_cache_lock on;
# proxy_cache_lock_timeout 5s;
# proxy_cache_lock_age 5s;