Oracle DBA Master Knowledge Base 🚀

Welcome to my personal documentation for Oracle Database Administration. This repository follows a structured path from Core Architecture to High Availability setups.

Status: 🚧 Active Development (Updating Daily with Lab Scenarios)

📚 Table of Contents

🟢 Phase 1: Core DBA & Architecture (The Foundation)

Focus: Internal Architecture, User Management, and Daily Operations.

1. Oracle Architecture Deep Dive (Coming Soon)
   • Instance (SGA/PGA) & Processes (PMON, SMON, DBWR, LGWR)
   • Physical Structure: Datafiles, Controlfiles, Redo Logs, SPFILE/PFILE
2. Storage & Space Management (Coming Soon)
   • Tablespace Management (Creation, Resize, Undo, Temp)
   • Logical Structure: Segments, Extents, Blocks
3. User & Security Management (Coming Soon)
   • Users, Roles, Privileges & Profiles
   • Audit Trail & Standard Auditing
4. Connectivity & Networking (Coming Soon)
   • Listener Configuration, TNS entries, & DB Links
   • Dedicated vs. Shared Server Architecture
5. Operational Commands (Coming Soon)
   • Startup/Shutdown Modes & Checkpoints
   • Managing Locks & Latches (Conflict Resolution)

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🟡 Phase 2: Maintenance, Backup & Recovery (The Safety Net)

Focus: Data Protection, Patching, and Automation.

6. Backup & Recovery (RMAN) (Coming Soon)
   • RMAN Architecture, Retention Policies & Catalog
   • Scenarios: Loss of Controlfile, Datafile, Redo Log & SPFILE
   • Cloning & Duplication of Database
7. Utilities & Data Movement (Coming Soon)
   • Data Pump (EXPDP/IMPDP) Strategies
   • SQL*Loader & External Tables
8. Patching & Upgrades (Coming Soon)
   • OPatch Utilities & Conflict Checking
   • Database Upgrade (12c to 19c) & Migration Steps
   • AutoUpgrade Utility Modes (Analyze, Fixup, Deploy)

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🔴 Phase 3: High Availability & Advanced Config (The Expert Level)

Focus: Linux Setup, ASM, Data Guard, and RAC.

9. Installation & Configuration (Coming Soon)
   • Oracle Linux Setup (Pre-requisites, RPMs, Kernel Parameters)
   • Grid Infrastructure (ASM) Installation & Configuration
   • Creating CDB & PDB (Multitenant Architecture)
10. Disaster Recovery (Data Guard) (Coming Soon)
    • Physical Standby Setup & Configuration
    • Switchover, Failover & Gap Resolution
11. Real Application Clusters (RAC) (Coming Soon)
    • 2-Node RAC Setup Overview & SRVCTL Commands
12. Performance Tuning (Coming Soon)
    • AWR, ADDM, & ASH Analysis
    • Wait Events, Blocking Sessions & Index Tuning

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Author: Shomdev Singh