# Why TiDB?
+ TiDB Benefits
  + Distributed SQL Database - Multitenancy
  + Hybrid Workloads – in the same database 
      + Transactional – row based data
      + Relational –column based data
  + Elastic Scale 
    + Scale in – reduce nodes	
    + Scale out – add nodes
  + High Availability “RAFT” Based
    + Each data segment is replicated across 3 data availability zones	
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Review

Hybrid– TiDB determines the correct storage engine based on query demands

Elastic – add and subtract nodes dependent upon workload