NOSQL 2024 - Module 3

Aggregate oriented databases increased with the increase in _____

• Big data

• Clusters

• Internet users

• Social connectivity

Clusters not just change the rules for _____ but also for _____

• Replication, Sharding

• Data storage, Computation

• Map, Reduce

• Distribution, Copying

When you have a cluster, you have lots of machines to spread the _____

• Storage

• Computation

• Replication

• Sharding

_____ is a way to organize processing in such a way as to take advantage of multiple machines on a cluster while keeping as much processing and the data it needs together on the same machine.

• Sharding

• Replication

• Map-Reduce

• Distribution

A _____ is a function whose input is a single aggregate and whose output is a bunch of key value pairs.

• Map

• Reduce

Mapping increases _____ and _____

• Distribution, Replication

• Data storage, Scaling

• Parallelism, Locality of data access

• Performance, Computation

The _____ function takes multiple _____ outputs with the same key and combines their values

• Map, Reduce

• Reduce, Map

What is the value of price after reduce function?

• 100

• 104

• 102

• 106

What is the value of quantity after reduce function?

• 30

• 40

• 34

• 26

A combiner function is similar to _____ function

• Map

• Reduce