MongoDB Database

  1. Scalability and High Availability
    1. Replication
      1. Replica Set Architecture
        1. Primary Node Role and Responsibilities
          1. Secondary Node Functions
            1. Arbiter Node Purpose and Usage
              1. Hidden and Delayed Members
              2. Replica Set Configuration
                1. Replica Set Initialization
                  1. Member Configuration Options
                    1. Priority and Vote Settings
                      1. Tag-Based Replica Sets
                      2. Automatic Failover and Elections
                        1. Election Process Mechanics
                          1. Failover Scenarios and Triggers
                            1. Election Timeout Configuration
                              1. Split-Brain Prevention
                              2. Data Synchronization
                                1. Oplog (Operations Log)
                                  1. Initial Sync Process
                                    1. Ongoing Replication
                                      1. Replication Lag Monitoring
                                      2. Read and Write Concerns
                                        1. Read Preference Options
                                          1. Primary Read Preference
                                            1. Secondary Read Preference
                                              1. Nearest Read Preference
                                                1. Tag-Based Read Preferences
                                                2. Write Concern Levels
                                                  1. Acknowledgment Requirements
                                                    1. Journaling Considerations
                                                      1. Timeout Settings
                                                        1. Custom Write Concerns
                                                      2. Replica Set Maintenance
                                                        1. Adding and Removing Members
                                                          1. Rolling Upgrades
                                                            1. Backup Strategies
                                                              1. Monitoring and Alerting
                                                            2. Sharding (Horizontal Scaling)
                                                              1. Sharded Cluster Architecture
                                                                1. Shard Components (mongod instances)
                                                                  1. Query Routers (mongos)
                                                                    1. Config Servers
                                                                      1. Cluster Topology Design
                                                                      2. The Sharding Process
                                                                        1. Enabling Sharding on Database
                                                                          1. Collection Sharding Setup
                                                                            1. Adding Shards to Cluster
                                                                              1. Data Distribution Mechanics
                                                                              2. Shard Keys
                                                                                1. Shard Key Selection Criteria
                                                                                  1. Cardinality Requirements
                                                                                    1. Distribution Patterns
                                                                                      1. Query Pattern Alignment
                                                                                      2. Shard Key Types
                                                                                        1. Hashed Sharding
                                                                                          1. Ranged Sharding
                                                                                            1. Compound Shard Keys
                                                                                            2. Shard Key Limitations
                                                                                              1. Immutability Constraints
                                                                                                1. Size Limitations
                                                                                                  1. Update Restrictions
                                                                                                2. Chunk Management
                                                                                                  1. Chunk Creation and Splitting
                                                                                                    1. Chunk Migration Process
                                                                                                      1. Chunk Size Configuration
                                                                                                      2. The Balancer
                                                                                                        1. Automatic Data Balancing
                                                                                                          1. Balancer Configuration
                                                                                                            1. Monitoring Balancer Activity
                                                                                                              1. Controlling Balancer Behavior
                                                                                                              2. Sharding Best Practices
                                                                                                                1. Shard Key Design Guidelines
                                                                                                                  1. Performance Optimization
                                                                                                                    1. Monitoring and Maintenance
                                                                                                                      1. Troubleshooting Common Issues
                                                                                                                    2. Zone Sharding
                                                                                                                      1. Geographic Data Distribution
                                                                                                                        1. Hardware-Based Sharding
                                                                                                                          1. Zone Configuration and Management

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                                                                                                                        9. Security in MongoDB