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What is the difference between Hadoop and RDBMS ?

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.
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