M

Maglev
- “a large, distributed software system”, the basis for the network load balancer in Cloud Load Balancing.
- https://research.google/pubs/pub44824/
MIG = Managed Instance Group
- A group of identical instances sharing an instance template, and which can be resized
- typically used with autoscaler but doesn't have to. Their unmanaged counterparts are only usable for load balancing, but not autocaling
- regional or zonal, with regional being generally recommended for zone failure resilience and simplicity
- all instances in a group can be updated by specifying a new template in a rolling update
Monitoring
- Per the SRE books: collecting, processing, aggregating and displaying *real-time quantitative data* about a system, such as
  - query counts and types
  - error counts and types
  - processing times
  - server lifetimes