Computer science 202 Databases

Vertical Scaling

Resources on a single machine are increased

Horizontal scaling

Resources are increased by providing more machines

Package managers

Adds, removes, restores and upgrades software dependencies including transitive dependencies.

Module

A directory containing python scripts

Dependency

Any external piece of software—such as a library, module, package, framework, or service—that your program relies on to compile, build, or run properly.

JSON

JavaScript Object notation

BSON

Binary JSON

How is BSON different from JSON

The specification contains extensions that allow for representations of datatypes that are not part of the JSON spec. It’s light weight , traversable and efficient

High availability

When data is still available despite equipment failure and/or data center failure

Sharding

The process of distributing a single dataset across multiple databases which can then be stored on multiple machines

Shard Key

Determines how documents are distributed amongst a cluster’s shards