New storage and data access solution for CMS experiment in Spain towards HL-LHC era

The Large Hadron Collider (LHC) will enter a new era for data acquisition by 2029 within the High-Luminosity Large Hadron Collider (HL-LHC) program, where the LHC will raise the proton and ion collisions up to unprecedented levels. This increase will imply a factor 10 in terms of luminosity as compared to the current values, having an impact in the way the experimental data is stored and analyzed. This work focuses on the research and development of new data cache solutions that are adopted towards the new era, studying its effects at the Spanish WLCG sites that support CMS activities, namely the PIC Tier-1 and CIEMAT Tier-2. We propose a model to access and cache the most popular CMS datasets in Spain by deploying XCache cache systems in both PIC and CIEMAT sites. This work is complemented with dedicated studies to better understand and optimize these new solutions in the region.