Complete Ghaymah Internship Assessment

scalability/calculations.md

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+# Scalability Calculations
+
+## Required Capacity
+
+Expected traffic:
+
+15,000 requests/second
+
+Each container handles:
+
+500 requests/second
+
+Base number of containers:
+
+15000 / 500 = 30 containers
+
+---
+
+## Safety Margin
+
+Required safety margin:
+
+30%
+
+30 × 1.30 = 39 containers
+
+Final requirement:
+
+**39 containers**
+
+---
+
+# Cold Start Strategy
+
+To reduce startup latency for new containers:
+
+- Keep at least 2 warm standby containers.
+- Pre-pull container images on worker nodes.
+- Use lightweight container images.
+- Enable Horizontal Pod Autoscaler.
+- Scale gradually based on CPU and request rate.
+- Perform health checks before routing traffic.
+
+This minimizes cold start delays during traffic spikes.
+
+---
+
+# Using Ghaymah Block Storage
+
+Block Storage is suitable for stateful workloads because it provides persistent storage independent of the container lifecycle.
+
+Typical use cases:
+
+- PostgreSQL
+- MySQL
+- MongoDB
+- Redis persistence
+- Application uploads
+- Log storage
+
+Benefits:
+
+- Persistent data after container restarts.
+- High-performance disk access.
+- Easy attachment to containers.
+- Reliable storage for production workloads.
+
+Containers can be recreated without losing application data because the storage volume remains intact.