MongoDB Atlas and Cloud Deployment Flashcards

What is Atlas Search in MongoDB Atlas?

Answer: A full-text search engine built on Apache Lucene, integrated directly into Atlas clusters

Atlas Search is a fully managed full-text search solution built on Apache Lucene and integrated directly into Atlas clusters. It supports fuzzy matching, autocomplete, facets, custom analyzers, and relevance scoring — all using the MongoDB aggregation pipeline with the $search stage.

What is Atlas Data Federation?

Answer: Querying and combining data from Atlas clusters, S3 buckets, and Atlas Data Lake using MQL or SQL

Atlas Data Federation enables querying data across multiple sources — Atlas clusters, AWS S3, Azure Blob Storage, HTTP endpoints, and Atlas Online Archive — using MongoDB Query Language or SQL. Results from disparate sources are unified without ETL pipelines.

What does Atlas Online Archive do?

Answer: Automatically moves infrequently accessed data from Atlas clusters to cost-effective cloud object storage

Atlas Online Archive automatically tiers cold data from your Atlas cluster to MongoDB-managed cloud object storage based on date or custom criteria. Archived data remains queryable via Atlas Data Federation, reducing cluster storage costs while maintaining accessibility.

What is VPC Peering in Atlas and why is it used?

Answer: Establishing a private network connection between your cloud provider VPC and the Atlas VPC to avoid public internet traffic

VPC Peering creates a private network connection between your AWS VPC (or Azure VNet / GCP VPC) and the Atlas cluster's VPC. Traffic between your application and Atlas traverses the cloud provider's private network rather than the public internet, improving security and reducing latency.

What is Atlas Triggers in MongoDB Atlas?

Answer: Server-side functions that execute automatically in response to database events, scheduled times, or authentication events

Atlas Triggers are server-side JavaScript functions that run automatically in response to: database events (insert, update, delete via change streams), scheduled intervals (cron-like), or authentication events (user login/creation). They are commonly used for data synchronization, notifications, and event-driven workflows.

What backup capability does Atlas provide with Continuous Cloud Backup?

Answer: Point-in-time recovery using continuous oplog backup, allowing restoration to any point within the retention window

Atlas Continuous Cloud Backup captures continuous oplog data in addition to periodic snapshots. This enables point-in-time restore (PITR) to any second within the configured retention window (up to 35 days). It provides recovery options for accidental writes, deletions, or application bugs.