Information system and general archive of SAO RAS observations

The telescopes of the Special Astrophysical Observatory of the Russian Academy of Sciences provide unique observational material. For observations, various astronomical instruments and data acquisition systems are used, which record observations with different data structures and descriptive parameters. The general archive of the observatory contains more than two dozen digital collections with observations obtained on various instruments. Maintaining an archival system requires software development, metadata management, fault tolerance, and periodic migration of files to modern storage media, which is important to ensure the long-term preservation of digital information. The archival system consists of three interconnected components that provide accumulation, long-term storage, and access to the data. The information system is implemented based on free PostgreSQL. The access to the archived files is provided through a web interface that supports queries by device, date, coordinates, object name, program applicant, and observer. The archive size is about 3 TB and its database contains more than 4 million records. The archive system uses two servers with directly connected storage systems. The main server implements data access, and the test server is used for development and testing. This configuration provides both permanent access to the files and the ability to modernize the information system.