What is MAMID?
MAMID is a manager for MongoDB database clusters, facilitating creation, administration and monitoring of Replica Set deployments. It was created as a student project for Praxis der Softwareentwicklung (software engineering) at the Karlsruhe Institute of Technology.
Explicit support for volatile storage on primary Replica Set members with lower-prioritized secondaries on persistent storage is a key differentiator of MAMID.
System Components
Master
- Monitors the Slaves
- Inserts Mongod instances into Replica Sets as needed while optimizing availability by respecting shared risks of failure
- Transfers Mongod instances to other Slaves on user request (e.g. in case of failure)
Slave
- Spawns and kills Mongod instances
- Reports their status to the Master
- Accepts the configuration from the Master and applies it to the Mongods and their Replica Sets
Notifier
- Sends email notifications in case of problems e.g. a slave is down