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coolvds.com › Blog › Database Management

Stop Killing Your Disk I/O: Migrating PHP Sessions to Redis

· CoolVDS Team

Is your web application stalling during high traffic? The bottleneck might be your hard disk. Discover why seasoned sysadmins are ditching file-based sessions for Redis 2.2 to achieve sub-millisecond latency.

coolvds.com › Blog › Hosting Solutions

Cloud Storage Myths in 2011: Why Latency is the Real Enemy

· Georgi Dimitrov

Is the "Cloud" just a marketing buzzword for slow remote servers? We dissect the state of storage technology in 2011, from spinning rust to the SSD revolution, and explain why hosting in Norway matters.

coolvds.com › Blog › Server Administration

Apache vs Lighttpd: The Battle for Concurrency in 2011

· CoolVDS Team

Is Apache's process-based model killing your RAM? We benchmark the heavy-hitter against the event-driven challenger, Lighttpd, to see which server architecture handles the C10k problem best on Norwegian infrastructure.

coolvds.com › Blog › Security & Compliance

Hardening Remote Access: OpenVPN Deployment on Debian 6

· CoolVDS Team

Public Wi-Fi is a security minefield. Learn how to deploy a rock-solid OpenVPN server on Debian Squeeze to encrypt your traffic, bypass restrictive firewalls, and keep your data subject to Norwegian privacy laws.

coolvds.com › Blog › Server Administration

Nginx Reverse Proxy: Stop Apache from Eating Your RAM

· CoolVDS Team

Is your Apache server choking under load? Learn how to deploy Nginx 1.0 as a reverse proxy to handle thousands of concurrent connections while keeping your backend lean. A production-ready guide for 2011.

coolvds.com › Blog › Server Administration

The Truth About Virtualization: Why Xen Still Beats "Cloud" Hype in 2011

· CoolVDS Team

Stop letting noisy neighbors kill your database performance. We dissect why Xen paravirtualization is the only serious choice for stability, how to tune DomU for high loads, and why hosting in Norway matters for your I/O.

coolvds.com › Blog › Security & Compliance

FTP is Dead: Why You Must Switch to SFTP Immediately

· CoolVDS Team

Sending passwords in cleartext over port 21 is professional suicide in 2011. Learn how to implement chrooted SFTP on your CoolVDS server to satisfy Datatilsynet and secure your infrastructure.

coolvds.com › Blog › DevOps & Infrastructure

Scaling Past the Slashdot Effect: The Battle-Hardened Guide to HAProxy 1.4

· CoolVDS Team

Traffic spikes shouldn't result in a 503 Service Unavailable. In this deep dive, we configure HAProxy 1.4 for high availability, analyze Round Robin strategies, and explain why underlying virtualization architecture dictates your load balancer's survival.

coolvds.com › Blog › DevOps & Infrastructure

Cloud Storage in 2011: Why Latency and Shared SANs Are Killing Your Web App

· CoolVDS Team

It is 2011, and the 'Cloud' buzzword is everywhere. But for systems architects, the reality is often high I/O wait and unpredictable performance. We explore why local RAID 10 storage beats centralized SANs and how to tune your Linux stack for speed.

coolvds.com › Blog › DevOps & Infrastructure

Scaling Past the Breaking Point: High Availability with HAProxy 1.4

· CoolVDS Team

Stop losing customers to 'Server Busy' errors. We define a bulletproof Layer 7 load balancing strategy using HAProxy to handle Norwegian traffic spikes without breaking the bank or sacrificing latency.