A Study of RAuxStore: Analyzing the Performance of RAuxStore Through Benchmarking
Translated title
A Study of RAuxStore
Authors
Term
4. term
Education
Publication year
2025
Submitted on
2025-05-15
Pages
59
Abstract
This thesis uses a synthetic benchmark to analyze the performance of the RAuxStore, a new auxiliary store developed to replace the TAuxStore in the ATLAS experiment at CERN. The RAuxStore is the RNTuple implementation of an auxiliary store, and the RNTuple data format is designed to improve I/O performance and reduce storage size compared to TTree, the format used by the existing TAuxStore. Initial benchmarking revealed surprising results, with the RAuxStore being outperformed by the TAuxStore. This thesis investigates the performance bottlenecks of the RAuxStore with a benchmark designed according to principles of well-defined benchmarking. We successfully identified bottlenecks in the RAuxStore; however, due to ongoing updates to ATLAS' software, we cannot definitively conclude whether these issues still exist in the current software.
Documents