CMS Computing: Performance and Outlook

TL;DR

The CMS distributed computing system effectively manages increasing data and processing demands from the LHC's high luminosity, demonstrating robust performance and outlining future challenges and solutions.

Contribution

This paper provides an update on CMS computing performance, highlighting recent achievements and outlining strategies to address upcoming challenges in high-luminosity conditions.

Findings

CMS computing system handles record data rates effectively.

Event sizes and processing times have increased due to higher luminosity.

The system's performance has remained robust amidst growing data complexity.

Abstract

After years of development, the CMS distributed computing system is now in full operation. The LHC continues to set records for instantaneous luminosity, and CMS continues to record data at 300 Hz. Because of the intensity of the beams, there are multiple proton-proton interactions per beam crossing, leading to larger and larger event sizes and processing times. The CMS computing system has responded admirably to these challenges. We present the current status of the system, describe the recent performance, and discuss the challenges ahead and how we intend to meet them.