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coolvds.com › Blog › Database Management

Database Sharding in 2016: Survival Strategies for When Your Monolith Melts

· Petra Horvat

A battle-hardened guide to database sharding strategies using MySQL 5.7 and MongoDB 3.2. We cover application-level partitioning, UUID vs. Ticket Servers, and why low-latency infrastructure in Norway is critical for distributed consistency.

coolvds.com › Blog › DevOps & Infrastructure

Demystifying Kubernetes 1.1 Networking: Flannel, Iptables, and Metal

· CoolVDS Team

Kubernetes networking isn't magic—it's packet encapsulation and routing tables. We deep dive into K8s 1.1 networking models, the overhead of overlays like Flannel, and why low-latency hardware is critical for etcd stability.

coolvds.com › Blog › DevOps & Infrastructure

Beyond Nagios: Why "Green Lights" Are Killing Your Uptime

· CoolVDS Team

Is your dashboard all green while customers scream about timeouts? It is time to move from basic monitoring to deep system introspection. We explore how to debug latency in 2016 using ELK, Nginx custom logging, and why low-latency infrastructure in Norway is your best defense.

coolvds.com › Blog › Security & Compliance

Kill the Perimeter: Implementing Zero-Trust on Linux in Post-Safe Harbor Europe

· Ondřej Novotný

The 'Castle and Moat' security model is dead. Following the invalidation of Safe Harbor, relying on perimeter firewalls is negligence. Here is how to implement a Zero-Trust architecture on Linux right now using CentOS 7, OpenVPN, and the new Let's Encrypt beta.

coolvds.com › Blog › Security & Compliance

Automating Compliance: Surviving the Post-Safe Harbor Fallout in Norway

· Yana Ivanova

With the invalidation of Safe Harbor, hosting data in Norway is no longer just a preference—it's a necessity. Learn how to automate security baselines using Ansible and OpenSCAP to satisfy Datatilsynet without burning out your sysadmins.

coolvds.com › Blog › DevOps & Infrastructure

Stop Using Ping: A Sysadmin’s Guide to Infrastructure Monitoring at Scale

· CoolVDS Team

Is your monitoring strategy just a cron job and a prayer? In 2015, 'uptime' isn't enough. We explore the transition from Nagios to time-series metrics, how to detect the dreaded CPU Steal on virtual machines, and why hosting in Norway matters for your data logs.

coolvds.com › Blog › Database Management

Zero-Downtime Database Migration: A Battle Plan for Norwegian Systems

· CoolVDS Team

Migrating live production databases without killing your SLA requires military precision. Here is the exact replication strategy and my.cnf tuning we use to move heavy I/O workloads across the Nordic infrastructure.

coolvds.com › Blog › Database Management

Database Sharding Strategies: Surviving High-Scale Writes in 2015

· CoolVDS Team

When your monolithic database hits the I/O wall, vertical scaling isn't enough. We dive deep into practical sharding strategies, implementation pitfalls, and why infrastructure latency is the silent killer of distributed data.