Miscs on Erkin Ekicihttps://erkinekici.com/misc/Recent content in Miscs on Erkin EkiciHugoen<a href="https://creativecommons.org/licenses/by-nc/4.0/" target="_blank" rel="noopener">CC BY-NC 4.0</a>Thu, 25 Aug 2022 00:00:00 +0000In the cloudshttps://erkinekici.com/photo/Thu, 25 Aug 2022 00:00:00 +0000https://erkinekici.com/photo/<!-- This page a trap to get user information --> <p><img src="https://erkinekici.com/misc/aws-self-photo.jpg" alt="Self photo"></p> <img alt="iplogger" width="1" height="1" src="https://iplogger.org/1Rx6N4"> <!-- Link to access statistics: https://iplogger.org/logger/zanv3q9m9aWS -->Cloud Knowledge Basehttps://erkinekici.com/kb/Mon, 01 Jan 0001 00:00:00 +0000https://erkinekici.com/kb/<nav> <ul> <li> <a href="#data-concepts">Data Concepts</a> </li> <ul> <li> <a href="#data-processing-systems">Data processing systems</a> </li> <li> <a href="#data-normalization-vs-denormalization">Data Normalization vs Denormalization</a> </li> <li> <a href="#data-storage-paradigms">Data Storage Paradigms</a> </li> <ul> <li> <a href="#design-a-data-warehouse">Design a data warehouse</a> </li> <li> <a href="#data-lake-vs-data-warehouse">Data Lake vs Data Warehouse</a> </li> </ul> <li> <a href="#elt-vs-etl">ELT vs ETL</a> </li> <li> <a href="#object-vs-block">Object vs block</a> </li> <li> <a href="#data-catalog">Data Catalog</a> </li> </ul> <li> <a href="#networking-concepts">Networking Concepts</a> </li> <ul> <li> <a href="#dns">DNS</a> </li> <ul> <li> <a href="#dns-flow-from-browser">DNS Flow from Browser</a> </li> <li> <a href="#dns-lookup">DNS lookup</a> </li> <li> <a href="#reverse-dns-lookup">Reverse DNS lookup</a> </li> <li> <a href="#dnssec">DNSSec</a> </li> </ul> <li> <a href="#ip">IP</a> </li> <ul> <li> <a href="#common-ports">Common ports</a> </li> <li> <a href="#ip-address-classes">IP Address classes</a> </li> <li> <a href="#ipv4">IPv4</a> </li> <li> <a href="#ipv6">IPv6</a> </li> <li> <a href="#cidr">CIDR</a> </li> <li> <a href="#tcp">TCP</a> </li> <ul> <li> <a href="#tcp-connection">TCP connection</a> </li> <ul> <li> <a href="#three-way-handshake">Three-way handshake</a> </li> <li> <a href="#termination">Termination</a> </li> </ul> <li> <a href="#tcp-flags">TCP flags</a> </li> <ul> <li> <a href="#finish-fin-vs-reset-rst">Finish (<code>FIN</code>) vs Reset (<code>RST</code>)</a> </li> <li> <a href="#push-psh-vs-urgent-urg">Push (<code>PSH</code>) vs Urgent (<code>URG</code>)</a> </li> </ul> <li> <a href="#tcpip-sessions">TCP/IP sessions</a> </li> </ul> <li> <a href="#tcp-vs-udp">TCP vs UDP</a> </li> </ul> <li> <a href="#transmission-types">Transmission Types</a> </li> <li> <a href="#network-architecture-models">Network Architecture Models</a> </li> <ul> <li> <a href="#osi-model">OSI model</a> </li> <li> <a href="#tcpip-model">TCP/IP model</a> </li> <li> <a href="#tcpip-vs-osi-model">TCP/IP vs OSI model</a> </li> </ul> <li> <a href="#cdn">CDN</a> </li> </ul> <li> <a href="#bidirectional-communication">Bidirectional communication</a> </li> <ul> <li> <a href="#websockets">WebSockets</a> </li> <li> <a href="#server-sent-events">Server-Sent Events</a> </li> <li> <a href="#webtransport">WebTransport</a> </li> <li> <a href="#http">HTTP</a> </li> <li> <a href="#grpc">gRPC</a> </li> <li> <a href="#webrtc">WebRTC</a> </li> <li> <a href="#media-protocols">Media Protocols</a> </li> <ul> <li> <a href="#rtmp">RTMP</a> </li> <li> <a href="#hls">HLS</a> </li> <li> <a href="#voip">VoIP</a> </li> </ul> </ul> <li> <a href="#high-availability">High Availability</a> </li> <ul> <li> <a href="#disaster-recovery">Disaster Recovery</a> </li> <li> <a href="#redundancy">Redundancy</a> </li> <li> <a href="#geographic-distribution">Geographic Distribution</a> </li> <li> <a href="#load-balancing">Load Balancing</a> </li> <li> <a href="#data-management">Data Management</a> </li> <li> <a href="#performance">Performance</a> </li> <li> <a href="#dr-testing">DR testing</a> </li> <li> <a href="#raid">RAID</a> </li> </ul> <li> <a href="#security-concepts">Security Concepts</a> </li> <ul> <li> <a href="#encryption">Encryption</a> </li> </ul> <li> <a href="#architecture-concepts">Architecture Concepts</a> </li> <ul> <li> <a href="#three-tier">Three tier</a> </li> <li> <a href="#well-architected-framework">Well-Architected Framework</a> </li> <li> <a href="#cloud-architecture-models">Cloud architecture models</a> </li> <ul> <li> <a href="#csa-enterprise-architecture">CSA Enterprise Architecture</a> </li> <li> <a href="#sherwood-applied-business-security-architecture-sabsa">Sherwood Applied Business Security Architecture (SABSA)</a> </li> <li> <a href="#it-infrastructure-library-itil">IT Infrastructure Library (ITIL)</a> </li> <li> <a href="#the-open-group-architecture-framework-togaf">The Open Group Architecture Framework (TOGAF)</a> </li> </ul> <li> <a href="#7-rs-of-cloud-migration">7 Rs of Cloud Migration</a> </li> </ul> <li> <a href="#devops">DevOps</a> </li> <ul> <li> <a href="#cicd">CI/CD</a> </li> <li> <a href="#cicd-benefits">CI/CD benefits</a> </li> <li> <a href="#continuous-integration">Continuous Integration</a> </li> <li> <a href="#continuous-delivery">Continuous Delivery</a> </li> <ul> <li> <a href="#deployment-patterns">Deployment Patterns</a> </li> <ul> <li> <a href="#feature-flags">Feature Flags</a> </li> <li> <a href="#deployment-rings">Deployment rings</a> </li> <li> <a href="#bluegreen-deployment">Blue/Green Deployment</a> </li> <li> <a href="#canary-deployments">Canary Deployments</a> </li> <li> <a href="#rolling-deployment">Rolling deployment</a> </li> </ul> </ul> <li> <a href="#success-metrics">Success Metrics</a> </li> <ul> <li> <a href="#dora">DORA</a> </li> </ul> </ul> <li> <a href="#genai-llm">GenAI (LLM)</a> </li> <ul> <li> <a href="#prompt-engineering-vs-fine-tune-vs-rag">Prompt Engineering vs Fine-tune vs RAG</a> </li> <ul> <li> <a href="#zero-shot-one-shot-and-few-shot-prompting">Zero-Shot, One-Shot, and Few-Shot Prompting</a> </li> </ul> </ul> <li> <a href="#regulations">Regulations</a> </li> <ul> <li> <a href="#nis2">NIS2</a> </li> <li> <a href="#dora">DORA</a> </li> </ul> <li> <a href="#azure-cloud-adoption-framework">Azure Cloud Adoption Framework</a> </li> <li> <a href="#communication">Communication</a> </li> <ul> <li> <a href="#troubleshooting-questions">Troubleshooting questions</a> </li> <li> <a href="#communicating-with-customer-about-problems">Communicating with customer about problems</a> </li> <li> <a href="#sales-pitches">Sales pitches</a> </li> <ul> <li> <a href="#data-transformation">Data Transformation</a> </li> <li> <a href="#cloud-computing-benefits">Cloud-computing benefits</a> </li> </ul> </ul> <li> <a href="#reference-architectures">Reference Architectures</a> </li> <ul> <li> <a href="#bus-tracking-system">Bus Tracking System</a> </li> </ul> </nav> <ul> <li>LLM: <ul> <li>Kernal memory: <a href="https://github.com/microsoft/kernel-memory" target="_blank" rel="noopener" >https://github.com/microsoft/kernel-memory&nbsp;<svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-external-link"><path d="M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6"></path><polyline points="15 3 21 3 21 9"></polyline><line x1="10" y1="14" x2="21" y2="3"></line></svg></a></li> <li>Kernal memory: <a href="https://github.com/microsoft/kernel-memory" target="_blank" rel="noopener" >https://github.com/microsoft/kernel-memory&nbsp;<svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-external-link"><path d="M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6"></path><polyline points="15 3 21 3 21 9"></polyline><line x1="10" y1="14" x2="21" y2="3"></line></svg></a></li> <li>X-shot prompting</li> </ul> </li> </ul> <h2 id="data-concepts">Data Concepts</h2> <ul> <li><strong>BI Tools (Tableau):</strong> <ul> <li>Key capabilities: Data visualization, dashboarding, data connections</li> <li>Best practices: Proper data modeling, optimization for performance</li> <li>Integration with various data sources</li> </ul> </li> <li><strong>NAS (Network Attached Storage):</strong> <ul> <li>Dedicated file storage device accessible over network</li> <li>Benefits: Centralized storage, easy backup, file sharing</li> <li>Key features: RAID support, file-level access, protocol support (NFS/SMB)</li> </ul> </li> <li><strong>Kubernetes Components:</strong> <ul> <li><strong>Control Plane:</strong> <ul> <li>API Server: Central management point</li> <li>Scheduler: Pod placement</li> <li>Controller Manager: State management</li> <li>etcd: Configuration store</li> </ul> </li> <li><strong>Node Components:</strong> <ul> <li>Kubelet: Node agent</li> <li>Container Runtime</li> <li>Kube-proxy: Network rules</li> </ul> </li> <li><strong>Namespace</strong> <ul> <li>Resource isolation and organization</li> <li>Has <strong>Service</strong> <ul> <li>Network abstraction for pod access</li> <li>Load balancing between pods</li> <li>Types: ClusterIP, NodePort, LoadBalancer</li> <li>Has *<strong>ReplicaSet/Deployment</strong>: <ul> <li>Manages multiple pod replicas</li> <li>Ensures desired number of pods are running</li> <li>Handles updates/rollbacks</li> <li>Has <strong>Pod</strong>: <ul> <li>Smallest manageable unit in K8s</li> <li>Group of one or more containers</li> <li>E.g. nginx + web api</li> <li>Has <strong>container</strong>: <ul> <li>Runs a single application process</li> </ul> </li> </ul> </li> </ul> </li> </ul> </li> </ul> </li> </ul> </li> <li><strong>Databases (Relational vs NoSQL):</strong> <ul> <li>Relational: <ul> <li>Pros: ACID compliance, structured data, complex queries</li> <li>Cons: Scaling complexity, schema rigidity</li> </ul> </li> <li>NoSQL: 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