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knowledge-base/CLOUD.en.md
Stanislav Hubacek 3fa11ef0f6 comiiit
2026-06-11 15:27:28 +02:00

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# ☁️ Cloud Architecture
## Providers
- **AWS** — largest market share, broadest portfolio
- **Azure** — strong integration with Microsoft ecosystem
- **GCP** — Kubernetes (GKE), data & ML, network connectivity
## Deployment Models
| Model | Description |
|-------|-------------|
| Public cloud | Shared provider infrastructure |
| Private cloud | Dedicated infrastructure (on-prem or hosted) |
| Hybrid cloud | Public + private interconnection |
| Multi-cloud | Multiple public providers |
## Multi-cloud Strategy
### Reasons for Multi-cloud
- **Vendor lock-in prevention** — risk diversification
- **Regulatory requirements** — data residency in specific regions
- **Best-of-breed** — each provider has strengths (AWS networking, Azure enterprise, GCP data/ML)
- **Acquisition scenarios** — merge & acquisition unification
### Multi-cloud Connectivity
| Method | Latency | Throughput | Cost |
|--------|---------|------------|------|
| Site-to-Site VPN | Medium | Limited | Low |
| Private interconnect (Direct Connect / ExpressRoute / Dedicated Interconnect) | Low | High | High |
| Cloud-to-cloud VPN | Medium | Medium | Medium |
| SD-WAN | Low | High | Medium |
### Challenges
- **Network complexity** — different VPC/VNet concepts, security models
- **IAM federation** — unified identities across clouds (SSO, SAML, OIDC)
- **Data gravity** — moving data between clouds is expensive and slow
- **Monitoring** — single pane of glass across clouds (Grafana, Datadog)
### Cloud Adoption Frameworks (CAF)
Each major provider has its own Cloud Adoption Framework for a structured approach to cloud adoption:
| Provider | Framework | Focus |
|----------|-----------|-------|
| AWS | AWS CAF | 6 perspectives: Business, People, Governance, Platform, Security, Operations |
| Azure | Microsoft CAF | 8 methodologies: Strategy, Plan, Ready, Migrate, Innovate, Govern, Manage, Secure |
| GCP | Google CAF | 4 pillars: Learn, Scale, Modernize, Operate |
Multi-Cloud Administration Guide (Mulder, 2024) recommends combining CAF frameworks across providers for unified governance models, especially in:
- **Interoperability** — standardization of APIs and IaC across clouds (Terraform, Pulumi)
- **Data governance** — unified policy for data residency and lifecycle
- **Compliance automation** — automated audits across clouds (AWS Config, Azure Policy, GCP Org Policies)
- **Access management** — identity federation and centralized RBAC
## Migration Strategies — 6 Rs
| Strategy | Description | Difficulty | Typical Scenario |
|----------|-------------|------------|------------------|
| **Rehost** (Lift & Shift) | Move VM/as-is without changes | Low | Quick migration, datacenter exit, minimal risk |
| **Replatform** (Lift & Reshape) | Migration with minor adjustments (e.g., RDS instead of self-managed DB) | Medium | Optimization without rewriting the application |
| **Refactor** (Re-architect) | Rewrite application as cloud-native (microservices, serverless) | High | Maximize cloud benefit, long-term strategy |
| **Repurchase** | Move to SaaS (e.g., Salesforce, Workday) | Low | Application is outdated, SaaS alternative exists |
| **Retire** | Decommission unused applications | Low | Application no longer in use |
| **Retain** | Keep on-prem | None | Regulatory reasons, too high migration risk |
### Decision Framework for 6 Rs
```
Start: Is the application needed?
├── No → Retire
└── Yes → Does a SaaS alternative exist?
├── Yes → Repurchase
└── No → Is refactoring worthwhile?
├── Yes → Refactor
└── No → Is platform change sufficient?
├── Yes → Replatform
└── No → Rehost
```
## Well-Architected Framework (AWS)
1. **Operational Excellence** — automation, monitoring, documentation
2. **Security** — IAM, encryption, compliance
3. **Reliability** — recovery, scaling, backup plans
4. **Performance Efficiency** — right-sizing, choosing the right services
5. **Cost Optimization** — FinOps, reserved instances, spot instances
6. **Sustainability** (since 2022) — carbon footprint, energy efficiency
Analogues: Azure Well-Architected Framework, GCP Architecture Framework
### Key Questions from Well-Architected Review (~60 questions)
**Operational Excellence (12 questions)**
- How are changes managed and automated?
- How are operations documented and shared within the team?
- How are expected and unexpected events reflected in operations?
- What runbooks exist for common operational scenarios?
- How is incident management and postmortem process conducted?
**Security (12 questions)**
- How is identity & access management implemented?
- How is data protected at rest and in transit?
- How is security incident detection ensured?
- What are the procedures for patch management and vulnerability remediation?
- How are infrastructure credentials and secrets managed?
**Reliability (12 questions)**
- How is service availability ensured during a component failure?
- How is backup and disaster recovery implemented?
- How do service limits (quotas, throttling) affect reliability?
- How does automatic scaling work under changing load?
- What are the SLI/SLO metrics and how are they monitored?
**Performance Efficiency (12 questions)**
- How is the correct type and size of compute/storage selected?
- How is the database layer optimized (indexes, queries, caching)?
- How is monitoring used to identify bottlenecks?
- How is scaling implemented (vertical vs horizontal)?
**Cost Optimization (12 questions)**
- How are costs allocated to teams/projects (chargeback/showback)?
- What tools are used for cost analysis?
- How are unused resources identified and eliminated?
- How is licensing optimized (BYOL, hybrid benefit)?
## Key Components
### Compute Layer
- **VM / instances** — EC2, Azure VMs, GCE
- **Container orchestration** — EKS, AKS, GKE
- **Serverless** — Lambda, Azure Functions, Cloud Functions
- **PaaS** — App Engine, Elastic Beanstalk, Azure App Service
### Compute Comparison Matrix (AWS EC2)
| Family | Type | vCPU:Memory | Use Case | Example Pricing (on-demand, us-east-1) |
|--------|------|-------------|----------|----------------------------------------|
| **General purpose** | M7g, m7i | 1:4 | Web servers, microservices, dev/test | m7i.large ~$0.088/h |
| **Compute optimized** | C7g, c7i | 1:2 | HPC, batch processing, CI/CD, gaming | c7i.large ~$0.078/h |
| **Memory optimized** | R7g, r7i, x2idn | 1:8 to 1:32 | In-memory DB (Redis), SAP HANA, real-time analytics | r7i.large ~$0.118/h |
| **Storage optimized** | I4i, im4gn | 1:4 + NVMe | Transactional DB, data warehousing, Kafka | i4i.large ~$0.138/h |
| **GPU / ML** | P5, g5, trn1 | GPU attach | AI training (P5), inference (g5), ML (trn1) | g5.xlarge ~$1.006/h |
See [GPU.md](GPU.md) for GPU model and configuration details.
### Storage
- **Object storage** — S3, Blob Storage, Cloud Storage
- **Block storage** — EBS, managed disks, persistent disks
- **File storage** — EFS, Azure Files, Filestore
- **CDN** — CloudFront, Azure CDN, Cloud CDN
### S3 Storage Classes
| Class | Availability | Retrieval Time | Price / GB / Month | Use Case |
|-------|-------------|----------------|--------------------|----------|
| **S3 Standard** | 99.99 % | milliseconds | ~$0.023 | Active data, frequent access |
| **S3 Intelligent-Tiering** | 99.9 % | milliseconds | ~$0.023 + monitoring fee | Unknown/variable access patterns |
| **S3 Standard-IA** | 99.9 % | milliseconds | ~$0.0125 | Less frequent but fast access |
| **S3 One Zone-IA** | 99.5 % | milliseconds | ~$0.01 | Reproducible data |
| **S3 Glacier Instant** | 99.9 % | milliseconds | ~$0.004 | Archive with occasional access |
| **S3 Glacier Flexible** | 99.99 % | 1-5 min (expedite) / 3-5 h (standard) | ~$0.0036 | Long-term archive |
| **S3 Glacier Deep Archive** | 99.99 % | 12 h (standard) / 48 h (bulk) | ~$0.00099 | Cheapest, compliance archives |
## Multi-AZ and Multi-Region Architecture
```
Region ┌──────────────────────────────┐
│ AZ-1 AZ-2 AZ-3 │
│ ┌───┐ ┌───┐ ┌───┐ │
│ │APP│──────│APP│──────│APP│ │
│ └─┬─┘ └─┬─┘ └─┬─┘ │
│ │ │ │ │
│ ┌─▼──────────▼──────────▼─┐ │
│ │ Load Balancer │ │
│ └────────────┬────────────┘ │
│ │ │
│ ┌────────────▼────────────┐ │
│ │ Database (Primary) │ │
│ │ + Read Replica │ │
│ └─────────────────────────┘ │
└──────────────────────────────┘
```
## Disaster Recovery Strategies
### DR Strategies on AWS (from least to most prepared)
| Strategy | RTO | RPO | Cost | Description |
|----------|-----|-----|------|-------------|
| **Backup & Restore** | hours | 24 h | Low | Regular data backups to S3/Glacier, restore in DR region |
| **Pilot Light** | tens of minutes | minutes | Medium | Minimal running copy (DB, core services), scale on failover |
| **Warm Standby** | minutes | seconds | High | Reduced production copy running, scale on failover |
| **Active-Active (Multi-Region)** | seconds | < 1 s | Very high | Fully active in multiple regions, traffic routing (Route53, Global Accelerator) |
Key books on the topic:
- **Engineering Resilient Systems on AWS** (Schwarz, Moran, Bachmeier, 2024) — practical labs for resilience patterns: back off and retry, multi-Region failover, circuit breaker, chaos engineering using AWS Fault Injection Simulator
- **Building Resilient Architectures on AWS** (2025) — data security, backup strategies, recovery plan automation
### Chaos Engineering
Deliberate fault injection to verify system resilience:
- **AWS Fault Injection Simulator (FIS)** — managed fault injection for EC2, ECS, EKS, RDS
- **Tools**: Chaos Mesh (Kubernetes), Gremlin, Litmus
- **Process**: define hypothesis → run experiment → measure impact → improve system
- **Safety**: experiments in isolated environment, safety controls, automatic rollback
## Cloud Design Patterns
### Strangler Fig
Gradually replacing parts of a monolithic application with microservices.
- Legacy functionality is progressively redirected to new services
- Strangler Fig proxy (route headers, feature flags) controls traffic migration
- Advantage: incremental value delivery without big-bang rewrite
### Circuit Breaker
Prevents cascading failures when a dependent service fails.
- Three states: **Closed** (normal operation), **Open** (requests immediately fail), **Half-Open** (test request after timeout)
- Parameters: failure threshold, timeout (reset timeout), half-open max requests
- Implementations: resilience4j, Hystrix (legacy), Istio (envoy), AWS App Mesh
### Saga
Distributed transaction across microservices — a series of local transactions with compensating actions.
- **Choreography** — each service publishes an event, the next service reacts (Kafka, EventBridge)
- **Orchestration** — central orchestrator manages steps (Step Functions, Temporal, Camunda)
### CQRS (Command Query Responsibility Segregation)
Separation of write (Command) and read (Query) models.
- Command model: optimized for writes (normalized, transactional)
- Query model: optimized for reads (denormalized, read-optimized views)
- Eventual consistency between models (event bus propagates changes)
- Use case: reporting, audit logs, high-throughput systems
### Event Sourcing
Storing state as a sequence of events, not the current state.
- Each change is an append-only event in an event store
- Current state = fold of all events
- Advantages: audit trail, time travel, CQRS compatibility
- Implementations: EventStoreDB, Kafka (log), DynamoDB + CDC
### Additional Cloud Patterns (Wilder — Cloud Architecture Patterns)
| Pattern | Category | Description |
|---------|----------|-------------|
| **Horizontally Scaling Compute** | Scalability | Adding/removing instances based on load, elasticity |
| **Queue-Centric Workflow** | Scalability | Decoupling components via queues (SQS, RabbitMQ), async processing |
| **Auto-Scaling** | Scalability | Automatic scaling based on metrics (CPU, memory, request count) |
| **MapReduce** | Big Data | Distributed data processing (Hadoop, EMR, BigQuery) |
| **Database Sharding** | Big Data | Horizontal data partitioning across databases |
| **Busy Signal** | Failure Handling | Graceful degradation under overload (HTTP 503, throttling, backpressure) |
| **Node Failure** | Failure Handling | Detection and automatic recovery from compute node failure |
| **Colocation** | Distributed Users | Placing compute close to data to reduce latency |
| **Valet Key** | Distributed Users | Delegated storage access (SAS tokens, S3 presigned URLs) |
| **Multi-Site Deployment** | Distributed Users | Active deployment in multiple geographic locations |
## Evolutionary Architecture
Definition (Ford, Parsons, Kua, 2022): *An evolutionary architecture supports guided, incremental change across multiple dimensions.*
### Fitness Functions
Automated checks of architectural characteristics — analogous to tests for architecture:
| Type | Description | Example |
|------|-------------|---------|
| **Atomic** | Checks a single metric | Cyclomatic complexity < 10 |
| **Holistic** | Checks the overall system | End-to-end latency < 200 ms |
| **Triggered** | Triggered by event (CI/CD commit, deployment) | API contract verification |
| **Continuous** | Runs continuously in production | Monitoring dependency freshness |
| **Static** | Code analysis without execution | SonarQube, ESLint |
| **Dynamic** | Runtime analysis | Load tests, chaos experiments |
### Principles of Evolutionary Architecture
1. **Incremental change** — small, safe changes thanks to CI/CD, deployment pipelines, mature DevOps
2. **Fitness functions** — automated protection of architectural characteristics (scalability, performance, security)
3. **Coupling management** — conscious work with component connections (affinity, volatility, cycles)
4. **Evolutionary data** — database migrations as first-class citizens (evolutionary schemas, expand-contract pattern)
### Antipatterns
- **Big Design Up Front (BDUF)** — trying to design everything upfront, ignoring change
- **No Design at All** — absence of architectural thinking, purely emergent design
- **Premature Standardization** — introducing standards before the domain is understood
## Hybrid Cloud Connectivity
See also: [NETWORKING.md](NETWORKING.md) — network architecture (VPN, BGP, VPC design).
- **Site-to-Site VPN** — IPSec tunnel over the internet
- **Direct Connect / ExpressRoute / Dedicated Interconnect** — private physical connection
- **Cloud VPN / Transit Gateway** — hub-and-spoke topology
## Cost Optimization Detail
### Savings Plans vs Reserved Instances
| Property | Compute Savings Plan | EC2 Instance Savings Plan | Reserved Instances |
|----------|----------------------|---------------------------|-------------------|
| Flexibility | Instance family, region, OS | Instance family + region | Specific instance |
| Term | 1 or 3 years | 1 or 3 years | 1 or 3 years |
| Discount (typical) | ~30-50 % | ~40-60 % | ~40-60 % |
| Change instance | Yes (any) | Yes (within family) | No |
| Change region | Yes | No | No |
| Payment options | All Upfront / Partial / No Upfront | All Upfront / Partial / No Upfront | All Upfront / Partial / No Upfront |
### Spot Instance Best Practices
- **Diversification** — use a mix of instance types (spot fleet) for higher availability
- **Graceful handling** — application must handle termination notice (2 minute warning)
- **Checkpointing** — regular state saving for restart after spot interruption
- **Spot block** (AWS) — protection for 1-6 h (limited availability)
- **Use cases**: batch processing, CI/CD runners, stateless microservices, ML training
- **Avoid**: stateful workloads, databases (without special design)
## Organization and Governance
### AWS Organizations
```
Root OU
├── Security OU
│ ├── Audit Account (CloudTrail, Config)
│ └── Security Tooling Account (GuardDuty, Security Hub)
├── Infrastructure OU
│ ├── Network Account (Transit Gateway, VPN)
│ ├── Shared Services Account (AD, SSO)
│ └── Log Archive Account
├── Workloads OU
│ ├── Dev OU → individual dev accounts
│ ├── Staging OU → staging accounts
│ └── Prod OU → production accounts
└── Sandbox OU → isolated experimental accounts
```
- **SCP** (Service Control Policies) — whitelist/blacklist services at OU level
- **Tag policies** — enforce tagging across accounts
- **AI services opt-out** — control data usage in AWS AI services
### Azure Management Groups
```
Tenant Root Group
├── Platform MG
│ ├── Connectivity (hub VNet, ExpressRoute)
│ ├── Management (Log Analytics, Automation)
│ └── Identity (AD DS, PIM)
├── Application MG
│ ├── DEV (dev subscriptions)
│ ├── TEST (test subscriptions)
│ └── PROD (production subscriptions)
└── Sandbox MG
```
- **Azure Policy** — built-in and custom policies (similar to SCP)
- **Management Group hierarchy** — up to 6 levels deep
- **Subscription limits** — max 10,000 subscriptions per tenant
### GCP Projects
```
Organization Node
├── Folder: Platform
│ ├── Project: Shared Networking (VPC, Cloud NAT, VPN)
│ ├── Project: Security (Cloud KMS, Secret Manager, Chronicle)
│ └── Project: Monitoring (Cloud Monitoring, Logging)
├── Folder: Workloads
│ ├── Folder: Dev
│ │ └── Project: [app]-dev
│ ├── Folder: Staging
│ │ └── Project: [app]-staging
│ └── Folder: Prod
│ └── Project: [app]-prod
└── Folder: Sandbox
└── Project: [user]-sandbox
```
- **Organization policies** — constraints at organization/folder level
- **Resource Manager** — hierarchy: Organization → Folder → Project → Resources
- **Project limits** — max 30 projects (can be increased), 10k resources per project
## 12-Factor App Methodology
Methodology for building cloud-native applications (Heroku, 2011), expanded by the book **Multi-Cloud Handbook for Developers** (Natarajan, Jacob, 2024).
| # | Factor | Description | Cloud Implementation |
|---|--------|-------------|----------------------|
| 1 | **Codebase** | One repo, many deployments | Git + CI/CD pipeline |
| 2 | **Dependencies** | Explicit dependency declaration | package.json, requirements.txt, Docker image |
| 3 | **Config** | Configuration in environment variables | Secrets Manager, Parameter Store, env vars |
| 4 | **Backing services** | Dependent services as attached resources | RDS, S3, Redis — connection via connection string |
| 5 | **Build, release, run** | Strict separation of build stages | CI/CD pipeline (GitHub Actions, GitLab CI) |
| 6 | **Processes** | Application as stateless processes | Horizontal scaling, session in Redis |
| 7 | **Port binding** | Service exports port, not embedded in server | Express, FastAPI, Spring Boot on own port |
| 8 | **Concurrency** | Scaling via process model | Horizontal Pod Autoscaler (K8s), EC2 Auto Scaling |
| 9 | **Disposability** | Fast startup and graceful shutdown | Health checks, SIGTERM handling, preStop hooks |
| 10 | **Dev/Prod parity** | Minimal difference between environments | Docker, IaC (Terraform), same backing services |
| 11 | **Logs** | Logs as event streams | stdout/stderr → CloudWatch, ELK, Datadog |
| 12 | **Admin processes** | Admin tasks as one-off processes | DB migrations, data backfill — run in isolation |
### Multi-cloud Extensions (Multi-Cloud Handbook for Developers)
- **API-first design** — consistent API interfaces across clouds (REST, gRPC)
- **Domain-Driven Design (DDD)** — bounded contexts mapped to cloud services
- **Service Mesh** — Istio, Linkerd for observability, traffic management and security across clouds
- **GitOps** — declarative deployment with ArgoCD/Flux across Kubernetes clusters in different clouds
## Azure Cloud Native Architecture (Map Book)
Based on **The Azure Cloud Native Architecture Mapbook (2nd ed.)** (Eyskens, 2025) — 40+ architectural maps across domains:
### Domains of Architectural Maps
| Domain | Key Azure Services | Architectural Patterns |
|--------|-------------------|----------------------|
| **Infrastructure** | VNet, Azure Firewall, ExpressRoute, VPN Gateway | Hub-and-spoke, Virtual WAN, Private Link |
| **Applications** | App Service, API Management, Service Bus, Functions | Event-driven, Strangler Fig, Backend for Frontend |
| **Data** | Cosmos DB, SQL Database, Synapse, Data Lake | CQRS, Event Sourcing, Polyglot Persistence |
| **Container Orchestrators** | AKS, Azure Container Apps, ACA | Sidecar, Ambassador, Adapter (service mesh) |
| **AI** | Azure OpenAI, Cognitive Services, ML Studio | RAG, model fine-tuning, MLOps |
| **Security** | Entra ID, Defender for Cloud, Key Vault, Sentinel | Zero Trust, Defense in depth, JIT Access |
### Cloud Adoption Framework on Azure
- **Strategy** — business case, application catalog, portfolio rationalization
- **Plan** — landing zone design, governance baseline, subscription taxonomy
- **Ready** — landing zone implementation (ALZ), Azure Policy, Networking, Identity
- **Migrate** — assessment (Azure Migrate), rehost/replatform, test and cutover
- **Govern** — cost management, policy enforcement, compliance monitoring
## Cloud Provider Comparison
Based on **Cloud Computing: AWS, Azure, Google Cloud** (Sario, 2025):
| Area | AWS | Azure | GCP |
|------|-----|-------|-----|
| **Compute** | EC2, Lambda, ECS/EKS | VMs, Functions, AKS | GCE, Cloud Functions, GKE |
| **Storage** | S3, EBS, EFS | Blob, Disk, Files | Cloud Storage, Persistent Disk, Filestore |
| **Relational DB** | RDS (MySQL, PG, SQL Server, Oracle, MariaDB) | SQL Database, MySQL/PostgreSQL | Cloud SQL (MySQL, PG, SQL Server) |
| **NoSQL DB** | DynamoDB, ElastiCache | Cosmos DB, Redis Cache | Firestore, Bigtable, Memorystore |
| **Message queue** | SQS, SNS | Service Bus, Queue Storage | Pub/Sub, Tasks |
| **Observability** | CloudWatch, X-Ray | Monitor, Application Insights | Cloud Monitoring, Cloud Trace |
| **AI/ML** | SageMaker, Bedrock | Azure ML, OpenAI | Vertex AI, AutoML |
| **Pricing (compute)** | On-demand, Reserved, Spot, Savings Plan | Pay-as-you-go, Reserved, Spot | On-demand, Committed Use, Spot |
## OpenStack as Private Cloud
OpenStack is the dominant open-source platform for building private clouds (IaaS). It provides compute (Nova), networking (Neutron), and storage services (Cinder/Swift/Manila) with a unified API.
### Advantages over Commercial Solutions
- **Vendor-neutral API** — avoids lock-in (VMware, Hyper-V)
- **Multi-tenancy** — Keystone identity, RBAC, projects, quotas
- **Hybrid cloud ready** — federation with AWS/Azure/GCP, Terraform provisioning
- **Ecosystem** — hundreds of services (Heat orchestration, Magnum containers, Designate DNS)
### Suitable Scenarios
| Scenario | Key Services |
|----------|--------------|
| Data center with multi-tenancy and self-service | Nova, Neutron, Cinder, Horizon |
| Telco / NFVI / MEC | Neutron (DPDK, SR-IOV), Nova (NUMA pinning) |
| Science and HPC | Cyborg (GPU), Manila (NAS), Ironic (bare metal) |
| Academic clouds | Keystone federation, Trove (DBaaS) |
### Challenges
- Significant deployment and operations complexity
- Frequent API breaking changes between releases (cycle per year)
- Limited enterprise support outside commercial distributions (Red Hat, Canonical, Mirantis)
## Best Practices
- Use **infrastructure as code** (Terraform, Pulumi, CDK)
- Design for **failure** — every component can fail
- Implement **defense in depth** — security at every layer
- Monitor **costs** — tagging, budget alerts, anomaly detection
- Use **managed services** where it makes sense (less operations)
- **Least privilege** for all IAM roles and policies
## Resources
Links, books and standards: [sources/cloud/sources.md](sources/cloud/sources.md)
- **Cost tagging** — assign tags for chargeback/showback (Environment, Team, Cost Center, Application)
- **Automated compliance** — AWS Config, Azure Policy, GCP Org Policies for guardrails
- **Multi-account strategy** — AWS Control Tower, Azure Landing Zones, GCP Resource Hierarchy
### Recommended Reading
| Book | Authors | ISBN | Description |
|------|---------|------|-------------|
| The AI Cloud Infrastructure Blueprint | Thummarakoti, Vududala, Madupati, Kaushik | 978-1-041-16642-9 | End-to-end guide to designing, deploying, and managing AI systems on cloud platforms. Covers public/private/hybrid/multi-cloud models for AI, infrastructure for ML training and inference, MLOps. Target audience: architects, data scientists, DevOps. |
| AWS for Solutions Architects (3rd ed.) | Shrivastava, Srivastav, Thakur | 978-1-83664-193-3 | Practical guide to AWS architecture — compute (EC2, Lambda), storage (S3, EBS), databases (RDS, DynamoDB), networking, security, Well-Architected Framework, migration, cost optimization. Suitable for AWS Solutions Architect certification preparation. |
*Last revised: 2026-06-03*