What is the difference between Hadoop and RDBMS ?
| Criteria | Hadoop | RDBMS |
|---|---|---|
| Schema | Based on ‘Schema on Read’. | Based on ‘Schema on Write’. |
| Data Type | Structured, Semi-Structured and Unstructured data. |
Structured Data. |
| Speed | Writes are Fast. | Reads are Fast. |
| Cost | Open source framework, free of cost. | Licensed software, Paid. |
| Application | Data discovery, Storage and processing of Unstructured data. |
OLTP and complex ACID transaction. |