||The SOFIA DCS Persistent Store: Maintaining Science and Mission Data in the Long Term
||485, Astronomical Data Analysis Software and Systems XXIII
||Krzaczek, R.; Shuping, R.; Lin, L.; Sun, L.; Charcos-Llorens, M.; Alles, R.; Perez, R.
||The Stratospheric Observatory for Infrared Astronomy (SOFIA) is an
airborne astronomical observatory comprised of a 2.5 meter infrared
telescope mounted in the aft section of a Boeing 747SP aircraft that
flies at operational altitudes between 37 000 and 45 000 feet,
above 99% of atmospheric water vapor.
SOFIA is projected to collect data over a 20 year lifetime, using a
growing variety of instruments and observational modes.
This in turn poses significant challenges for the long term
maintenance and storage of science and mission data, as well as the
delivery of that data to the astronomical community.
Herein we present some aspects from the design of the SOFIA
Data Cycle System (DCS) Persistent Store, which collects,
maintains, and ultimately delivers all mission, science, and
processed data to our end users.
Features such as DCS Data Integrity, ensuring that all
files are uncorrupted during their entire lifetime, from collection
and generation through delivery to a user's desktop, are efficiently
enabled by the Persistent Store.
Key techniques in its implementation, such as the adoption of
content addressable storage and inode indexing, are presented as well.
Finally, both planned and unplanned benefits from our adoption of
the Persistent Store are briefly detailed.