In large-scale networks. the structure of the underlying network changes frequently. and thus the power iteration method for Personalized PageRank computation cannot deal with this kind of dynamic network efficiently. In this paper. https://www.roneverhart.com/Western-Digital-Ultrastar-DC-HC570-WUH722222ALE6L4-0F48155-22TB-7-2K-RPM-SATA-6Gb-s-512e-SE-3-5in-Refurbished-HDD/