The economies of scale realised by institutional and commercial cloud providers make such resources increasingly attractive for grid computing. We describe an implementation of this approach which has been deployed for Australia’s ATLAS and Belle II grid sites. The sites are built entirely with virtual machines (VM) orchestrated by an Open- Stack instance. The storage element (SE) utilises an XRootD-S3 gateway with back-end storage provided through an S3-compatible object store from a commercial provider. The prov…

B A B AR stopped data collection in 2008, but its data is still analyzed by the collaboration. In 2021, a new computing system outside the SLAC National Accelerator Laboratory was developed, the new B A B AR Long Term Data Analysis system (LTDA). Major changes were needed to maintain the collaboration’s ability to analyze the data, while the user-facing front ends needed to remain unchanged. This LTDA system was put into production in 2022, and we will describe its unique infrastructure, which is based on cloud co…

Data preservation significantly increases the scientific output of high-energy physics experiments during and after data acquisition. For new and ongoing experiments, the careful consideration of long-term data preservation in the experimental design contributes to improving computational efficiency and strengthening the scientific activity in HEP through Open Science methodologies. This contribution is based on 15 years of experience of the DPHEP collaboration in the field of data preservation and focuses on aspe…

We present our innovative design to hosting Canada’s share of the Belle II raw data and the necessary computing infrastructure for its processing. Our approach involves disk-only grid storage solution that utilizes XRootD and ZFS, complemented by a compute framework that deploys specialized virtual machines to process the raw data. We discuss the advantages of our approach as well as the challenges encountered during deployment and commissioning.

The High Energy Physics Research Computing group at UVic used Dynafed to create federated storage clusters for Belle II and ATLAS that were used by worker nodes deployed on cloud computing facilities around the world. Since the development on Dynafed stopped, XRootD was tested with S3 as backend to replace Dynafed. We will show the similarities as well as the major differences between the two systems for data transfers, checksum calculations as well as clustering of different endpoints, which may help others to ef…