Fast Merging of RNTuple Data Sets
- Mentors
- Philippe Canal, Jakob Blomer
- Organization
- CERN-HSF
The RNTuple
interface is an experimental I/O subsystem for the ROOT
analysis framework. Preliminary benchmarks have demonstrated significant performance and space improvements over the legacy TTree
system. RNTuple
files are split into storage and metadata. Using metadata offset information, RNTuple
files can be merged together without a costly storage decompression step. This project will implement a fast merge function to combine RNTuple
data sets. The hadd
command-line tool will be updated to take advantage of the new RNTuple
merge features.