Collecting and aggregating data using distributed resources

A hierarchial tree is provided to harvest data from data sources. The hierarchial tree includes multiple tree node entities arranged in multiple levels. In one case, leaf node entities of the hierarchial tree are used to collect data from the data sources. The hierarchial tree includes storage resources for storing the collected data. The hierarchial tree further includes computing resources for aggregating the collecting data in one or more aggregation operations and performing other processing operations. A receiving entity can selectively and independently receive parts of the collected data and aggregated data.