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--- cdn [2025/09/09 19:20] – [⚙️ Editing the Configuration File] miko
+++ cdn [2025/11/25 16:37] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
+====== What is a CDN (Content Delivery Network)? ======
+A Content Delivery Network (CDN) is a system of distributed servers located around the world that work together to deliver web content to users more efficiently.
+===== Purpose =====
+The main goal of a CDN is to reduce latency and improve the speed, reliability, and security of content delivery. Instead of serving content from a single origin server, a CDN caches and delivers static assets (like images, stylesheets, scripts, and videos) from servers that are geographically closer to the user.
+===== How It Works =====
+When a user accesses a website:
+  * The CDN determines the closest edge server to the user.
+  * Static content is served from that nearby server.
+  * This reduces the time it takes for the content to load and minimizes bandwidth usage on the origin server.
+===== Benefits =====
+  * Faster load times for users worldwide
+  * Reduced server load and bandwidth usage
+  * Improved availability during traffic spikes
+  * Enhanced security features like DDoS protection and secure SSL delivery
+===== Example =====
+If your website is hosted in Germany and a visitor from Japan accesses it, the CDN will serve cached content from a server in Japan, making the site load much faster for that user.
+===== Common CDN Providers =====
+  * Cloudflare
+  * Akamai
+  * Fastly
+  * BunnyCDN
+  * Amazon CloudFront
+====== Benefits of a CDN in Second Life ======
+Second Life uses a Content Delivery Network (CDN) to distribute texture and mesh data more efficiently across the globe. This shift from simulator-based delivery to CDN-based delivery has brought several key improvements to the platform.
+===== 🚀 Performance Improvements =====
+  * Faster loading of textures and meshes
+  * Assets like avatar skins, clothing, and environment textures now load significantly faster, especially in crowded regions.
+  * Quicker region crossings and teleports
+  * Reduced load on simulator servers means smoother transitions between areas.
+  * Reduced “fuzzy” or “cloudy” avatars
+  * Avatars appear fully rendered more quickly, improving visual quality and immersion.
+===== 📉 Reduced Server Load =====
+  * CDN offloads asset delivery from simulator servers, freeing up resources for physics, scripting, and interaction.
+  * High HTTP load conditions on servers have dropped dramatically since the CDN rollout.
+===== 🌍 Global Reach =====
+  * Users outside North America benefit even more, with over 50% faster download times for textures and meshes.
+  * CDN edge servers deliver content from locations closer to the user, reducing latency.
+===== 🔧 Technical Stability =====
+• 	Improved resilience during traffic spikes or outages.
+• 	Faster recovery from load-related issues thanks to CDN redundancy and optimizations.
+===== ✅ Summary =====
+The integration of CDN technology into Second Life has:
+• 	Enhanced user experience through faster asset loading
+• 	Reduced strain on core infrastructure
+• 	Enabled more scalable and reliable virtual environments
 ====== Squid Proxy: Monitoring Logs and Editing Configuration ======
 This guide explains how to monitor Squid proxy logs in real time, edit its configuration file, and includes a sample shell script for setting up a test directory.
 ===== 📄 Live Log Monitoring =====
 To monitor Squid activity in real time, use the following command:
+<code>
+sudo tail -f /var/log/squid/access.log /var/log/squid/cache.log
+</code>
 This will continuously display new entries from:
@@ Line 9: / Line 58: @@
 ===== ⚙️ Editing the Configuration File =====
 To edit Squid’s main configuration file, run:
-<code>sudo nano /etc/squid/squid.conf<(code>
+<code>sudo nano /etc/squid/squid.conf</code>
+Example config:
+<code>
+http_port 192.168.0.43:1234 #the machine this is running on
+# http_port 127.0.0.1:1234
+cache_dir aufs /var/spool/squid/slcdn-cache 100000 16 256
+cache_mem 1024 MB
+maximum_object_size 1024 MB
+maximum_object_size_in_memory 50 MB
+minimum_object_size 0 KB
+cache_log /var/log/squid/cache.log
+access_log daemon:/var/log/squid/access.log
+cache_store_log /var/log/squid/store.log
+acl localnet src 192.168.0.0/24
+# http_access allow localnet
+http_access allow all
+cache allow all
+refresh_pattern . 43200 100% 43200
+range_offset_limit -1
+collapsed_forwarding on
+</code>
 ===== 📁 Log Paths in Configuration =====
 Inside , you can define the paths for Squid’s log files:
@@ Line 22: / Line 95: @@
 Here’s a simple Bash script to create a test directory:
+To run the script run the command:
+<code bash>
+wget https://mond-keks.de/downloads/SLEdgeCDN.sh SLEdgeCDN.sh
+chmod +x SLEdgeCDN.sh
+./SLEdgeCDN.sh
+</code>
 [[https://mond-keks.de/downloads/SLEdgeCDN.sh|SLEdgeCDN.sh]]
 <file SLEdgeCDN.sh>
 #!/bin/bash
@@ Line 139: / Line 217: @@
 This script creates a folder on the user’s desktop and can be extended for further setup tasks.
-===== ✅ Summary =====
-With these commands and settings, you can efficiently monitor and configure Squid. For production environments, consider:
+so start or restart squid
-• 	Log rotation (e.g. using )
+<code bash>
-• 	Securing the configuration file
+sudo systemctl restart squid
-• 	Regular analysis of access logs
+sudo systemctl start squid
+sudo systemctl stop squid
+</code>
+===== ⚙️ Firestorm settings =====
+{{:settingsproxy.png|}}