A data storage and retrieval system receives data points for a time series. The data storage and retrieval system stores the data points for a first portion of the time series using a first data format. Based at least in part on an analysis of queries performed on the first portion of the time series, the data storage and retrieval system determines to store a second portion of the time series using a second data format. The data storage and retrieval system stores subsequently received data points of the time series in the second data format.