Cloud Computing
What Cloud Computing Actually Is
Cloud computing is renting computing resources over a network and paying for what you use. Five characteristics separate a real cloud service from a r...
Cloud Computing
A complete Cloud and DevOps path: cloud fundamentals, Linux, networking, Git, AWS, Docker, Kubernetes, Terraform, CI/CD, Ansible, monitoring, security, architecture, cost, projects and interview preparation.
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Notes
Cloud Computing
Why Organisations Move to the Cloud, and Where It Disappoints
The real reasons teams adopt cloud are speed, capacity flexibility and reduced operational load. The honest limitations - cost surprises, lock in and...
Cloud Computing
Traditional IT and Cloud Compared
On premises, colocation, managed hosting and cloud are four different deals. Comparing them on cost, lead time, control and responsibility makes the c...
Cloud Computing
CapEx and OpEx in Cloud Spending
Buying capacity is capital expenditure; renting it is operating expenditure. The shift changes who approves spending, how fast you can act, and which...
Cloud Computing
Scalability and Elasticity
Scalability is the ability to grow. Elasticity is growing and shrinking automatically as demand moves. Vertical and horizontal scaling solve different...
Cloud Computing
Availability, Reliability and Fault Tolerance
Three words that get used interchangeably and mean different things. The nines table, the MTBF and MTTR formula, and why two components in series are...
Cloud Computing
High Availability and Disaster Recovery
High availability keeps a service running through ordinary failures. Disaster recovery brings it back after something large. RTO and RPO decide which...
Cloud Computing
Regions, Availability Zones and Edge Locations
Cloud providers divide the world into regions, regions into availability zones, and push content to edge locations. Choosing correctly affects latency...