Seamlessly integrating disk and tape in a multi-tiered distributed file system. - Ioannis Koltsidas; Slavisa Sarafijanovic; Martin Petermann; Nils Haustein; Harald Seipp; Robert Haas 001; Jens Jelitto; Thomas Weigold; Edwin R. Childers; David Pease; Evangelos Eleftheriou (ICDE, 2015)