What is the MongoDB Atlas?
Answer
MongoDB Atlas is MongoDB's fully managed cloud database service, available on AWS, Google Cloud Platform, and Microsoft Azure. It handles all operational complexity so developers can focus on applications. Key features: (1) Automated provisioning: deploy a replica set cluster in minutes with a GUI or API; (2) Automated backups: continuous backups with point-in-time restore and scheduled snapshots; (3) Automated scaling: vertical and horizontal scaling on demand; auto-scaling based on CPU/connections; (4) Built-in monitoring: real-time performance metrics, query profiler, index suggestions, alerts; (5) Global clusters: geo-distributed data across multiple regions/clouds with configurable write/read regions; (6) Atlas Search: full-text search powered by Apache Lucene, built directly into Atlas; (7) Atlas Data Lake: query data in S3 with MongoDB query language; (8) Atlas App Services: serverless backend (GraphQL, REST, triggers, authentication, sync); (9) Vector Search: store and query vector embeddings for AI/ML applications; (10) Free tier: M0 cluster with 512MB storage — great for development and small projects. Tiers: M0 (free), M10+, M30+ (dedicated clusters with more resources). Atlas manages: hardware, software updates, security patches, monitoring, backups, failover. Pricing: pay per cluster tier and data transfer.