I am new to Dremio and am work with a large dataset. The run performance is incredibly slow. I am trying to utilize reflects to gain performance efficiencies but this has greatly increased the response time. I need assistance in understanding the concept of data reflections and how performance may be improved
I would suggest this tutorial: https://www.dremio.com/tutorials/getting-started-with-data-reflections/
And this white paper: https://www.dremio.com/lp/data-reflections-best-practices
Also tell us where you have Dremio deployed. Your issue may simply be that your environment is underprovisioned for the size of the data you are querying.