Application of EPICS archiver appliance at SuperKEKB

SuperKEKB is an electron-positron collider at KEK. It utilized the home-made archive system named KEKBLog to record the operation data. We developed the test archive system based on the EPICS Archiver Appliance with the two clusters configuration. The expected functionalities of the Archiver Appliance are properly confirmed. The system is suitable for managing the load of the CPU and RAM. In addition to the standard method of data retrieval, we develop the new method with ROOT. It easily enables us to customize the retrieved data so that we analyze and receive more important information. Then we consider the configuration as the main archive system of SuperKEKB. It will be utilized in the autumn 2019 run. The new archive system steadily takes over the role of the current system. (author)