MongoDB Atlas Admin Associate case studies
MongoDB Atlas Admin Associate · Put your knowledge to work in context.
The MongoDB Atlas Admin Associate credential is aimed at administrators who run day-to-day operations on MongoDB Atlas rather than developers writing application queries. It validates that you can stand up a cluster with the right tier, region, and topology, then keep it secure, reachable, observable, recoverable, and reproducible. The MongoDB Atlas Admin Associate case studies are 5 cases and about 4,178 words.
1Hot Working Set on a Single Replica Set: Scale Up or Shard?
Your SaaS platform runs one 3-node replica set on Atlas M40 (16 GB RAM, 4 vCPU per node) in AWS us-east-1. The dataset is 260 GB; the hot working set is roughly 95 GB and growing about 8 GB per month.
870 words, about 4 min2Removing Public Access with Overlapping RFC1918 Space
An Atlas M30 3-node replica set runs in AWS us-east-1 and is reached today over public endpoints, with 46 entries in the project IP access list including a 0.0.0.0/0 left over from a pilot. Consumers are: 120 application hosts in the production VPC 10.0.0.0/16 (us-east-1), a shared-services VPC 10.2.0.0/16 (us-east-1), a eu-west-1 VPC 10.4.0.0/16, and on-premises systems reachable over AWS Direct Connect that are numbered out of 10.0.0.0/8 - the same 10.0.0.0/8 that was never summarized when the production VPC was created.
815 words, about 4 min3Recovering a Dropped Collection When the PITI Window Has Expired
A 2.1 TB Atlas M30 replica set uses Cloud Backup: continuous backups with the point-in-time window configured to 24 hours, plus snapshots every six hours on the hour, retained seven days. On Saturday at 02:40 a release script ran an unfiltered deleteMany({}) against shop.line items (about 180 GB, 60 million documents) and exited successfully.
851 words, about 4 min4Connection Exhaustion and Alert Fatigue on a Shared M30
A shared M30 3-node cluster (8 GB RAM, connection ceiling around 3,200) serves 40 Lambda functions owned by nine teams. Each function constructs a client at cold start with the driver default maxPoolSize of 100 and a concurrency limit of 200.
807 words, about 4 min5Least Privilege and Credential Rotation Across 60 Services
A production Atlas project has 22 database users. Sixty microservices share a single SCRAM user with readWriteAnyDatabase , created in 2019, whose password was found last week in a public GitHub repository (since deleted).
835 words, about 4 min