The ATLAS Eventindex Using the HBase/Phoenix Storage Solution

Abstract

International audienceThe ATLAS EventIndex provides a global event catalogue and event-level metadata for ATLASanalysis groups and users. The LHC Run 3, starting in 2022, will see increased data-taking andsimulation production rates, with which the current infrastructure would still cope but may bestretched to its limits by the end of Run 3. This talk describes the implementation of a new corestorage service that will provide at least the same functionality as the current one for increased dataingestion and search rates, and with increasing volumes of stored data. It is based on a set of HBasetables, coupled to Apache Phoenix for data access; in this way we will add to the advantages of aBigData based storage system the possibility of SQL as well as NoSQL data access, which allows there-use of most of the existing code for metadata integration