Hi everyone we are evaluating the druid and pinot for one ou

Question

Hi everyone we are evaluating the druid and pinot for one our usecase just to understand is the `startTree index` in pinot and `roll up` in druid are same or anything different

Mayank · Answer

StarTree is a specialized index that helps you customize level of preaggregation vs storage cost to best serve your needs This is unique to Pinot and no other system has it

sriramdas sivasai · Answer

exactly druid s `roll up` does the same thing i guess please correct me if i m wrong

Kishore G · Answer

roll up is simple aggregation across all dimensions

Kishore G · Answer

StarTree index is roll up across every dimension combination think of pre cube

Kishore G · Answer

Only difference is star tree index pre cubes only certain combinations

Kishore G · Answer

And thus avoids data explosion

Kishore G · Answer

sriramdas sivasai · Answer

Ok < UDRJ7G85T> understood thanks