|
SQL databases
|
NoSQL databases
|
|
|
Databases
|
Oracle
Microsoft MySQL |
Hadoop
MongoDB Cassandra Redis |
|
Upfront cost
|
free to very expensive
|
free
|
|
ongoing cost
|
lower operating costs from adminstration and analytics
|
Higher operating costs from adminstration and analytics
|
|
throughput
|
High
|
Low
|
|
Latency
(processing speed) |
Real-time
|
Slow, mostly historical
|
|
portability
|
MB to TB
|
TB to ZB
|
|
storage
|
Centralized
|
Distributed
|
|
structure
|
Structured data like RDBMS
|
Semi-structured to unstructured
|
|
consistency
|
Stable models
|
Unstable flat schemas
|
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