Reflektor

Reflektor is a cache of caches. It contacts a set of given caches until it finds one that contains the requested info_hash, and then caches the request locally before serving it.

Set up your own

reflektor requires:

PHP 5.4
nginx
linux

Configuration

nginx configuration:

# Rate-limiting pools:
# For reflektor.showrss.info, 1MB (about 16k states), limit to 1 request/second
# Rate-limit overall connections to this vhost to 10/s
# Limit the overall number of connections
limit_req_zone $binary_remote_addr zone=reflektor_ip_req:1m rate=1r/s;
limit_req_zone $server_name zone=reflektor_vhost_req:1m rate=10r/s;
limit_conn_zone $server_name zone=reflektor_vhost_conn:1m;

limit_req_status 503;
limit_req_log_level error;
limit_conn_status 503;
limit_conn_log_level error;

server {
    listen 80;

    root /var/www/reflektor/public/;
    index index.html;

    server_name reflektor.karmorra.info;

    rewrite "^/torrent/([A-Fa-f0-9]{40})\.[Tt][Oo][Rr]{2}[Ee][Nn][Tt]$" /serve.php?ih=$1 last;
    rewrite ^/torrent/?$ / redirect;

    limit_req_log_level info;
    limit_req zone=reflektor_ip_req burst=3;
    limit_req zone=reflektor_vhost_req burst=20;
    limit_req_status 429;
    error_page 429 /rate_limit.html;
    limit_conn reflektor_vhost_conn 50;
    limit_conn_status 503;

    location /rate_limit.html {
        internal;
        access_log off;
    }

    location /torrents/ {
        internal;
        alias /var/www/reflektor/cache/;
        access_log off;
    }

    location = /serve.php {
        fastcgi_pass unix:/var/run/php5-fpm.sock;
        fastcgi_index index.php;
        include fastcgi_params;
        access_log off;
    }
}

Proxy configuration:

Proxy servers can be used when connecting to the upstream providers. See public/providers.inc.php for details and syntax.

Recommendations

It is advisable to configure a deadicated php-fpm pool for reflektor, with increased pm.max_children, pm.start_servers, pm.min_spare_servers, and pm.max_spare_servers values. Tuning these values is important for performance.
Make sure permissions are correct, and that nginx is allowed to read the cache folder, and PHP is allowed to read and write the cache folder.
Cached torrents older than 7 days can be cleaned with the following command: find /var/www/reflektor/cache/ -type f -name '*.torrent' -mtime +7 -delete

showrss / reflektor