9 articles
Bring the world closer. Master the logic of Global High Availability. Learn to use 'Geo-Routing' to send users to the closest data center, understand 'Anycast' for ultra-reliable DNS, and learn to automate failover between whole cities using Dynamic DNS.
Protect your most valuable asset: your data. Master the architecture of Database High Availability. Learn the difference between 'Primary-Replica' and 'Multi-Primary' clusters. Understand the logic of the Binlog and the 'Read-Write Split'.
Keep your cluster in perfect harmony. Master 'rsync' for efficient file transfers and 'lsyncd' for real-time, event-based synchronization. Learn to mirror your web assets across 10 servers in milliseconds without manual intervention.
Build a high-performance traffic controller. Master 'HAProxy', the industry standard for load balancing. Learn to distribute traffic between multiple web servers, implement 'Sticky Sessions' for user login persistence, and use the 'Stats' dashboard to monitor your traffic flow.
Build your first failover cluster. Master 'Keepalived' and the VRRP protocol. Learn to share a single IP address between two servers. Understand priority settings, health checks, and how to trigger scripts when a failover happens.
Zero downtime is the goal. Discover the architecture of High Availability (HA). Learn the difference between Active-Passive and Active-Active clusters. Understand the concepts of 'Failover', 'Heartbeats', and 'The Split-Brain' problem.
Prepare for the inevitable. Hardware fails, but your data doesn't have to. Master Linux Software RAID with 'mdadm'. Learn the differences between RAID 1 (Mirroring), RAID 5 (Parity), and RAID 10. Understand how to replace a failed drive without losing a single bit.
Orchestration without the headache. Learn how to turn multiple Docker hosts into a single cluster using Docker Swarm Mode.
Handle the load. Learn how to switch from a 'Main' process to 'Queue Mode' using Redis workers to handle thousands of concurrent automations.