Difference between HBase and RDBMS?
| Hbase | RDBMS |
| Column Oriented | Row Oriented |
| Flexible schema, add columns on the fly | Fixed Schema |
| Good with sparse table | Not optimized for sparse table |
| Join using MapReduce not optimized | Not Applicable |
| Horizontal Scalability (Add hardware) | Hard to shard and scale |
| Good for structured and semi structured data | Good for structured data |
When to use HBase?
- High volume data to be stored
- column oriented data
- Unstructured
- High Scalability
- Versioned Data
- Generating data from an MR work flow
When not to use HBase?
- When you have only few thousand/million rows
- Lacks RDBMS commands
- When you have hardware less than 5 Data nodes
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