Monday, August 24, 2015

Comparison between RDBMS and Map-Reduce



RDBMS
Map-Reduce
Scalability
Scale UP
Scale Out
Data Size
GB
PB and more
Read/Write
Batch and Interactive
Batch
Update Type
Write many Read many
Write once Read many
Integrity
High
Low
Structure
Structural data/ Schema first Write later
Non Structural data/ Write first Schema later
Query
SQL
No SQL and SQL support too with add on tools
Response time
Faster for Less data/ slow once size increases
Faster for more data in comparison
Note: Slowly with the new sub projects being developed for Hadoop this gap is being filled up as people are developing an abstract layer on top of Map-Reduce and YARN frameworks which takes SQL and in turn convert it to Map-Reduce/Yarn.

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