-In terms of storage, the functional phases include a mixture of sequential and random read and write I/O. The functional phases are metadata intensive, like file stat and access calls. Although metadata operations are effectively without size, the read and write operations range between less than 1 K and 16 K. Most reads are between 4 K and 16 K. Most writes are 4 K or less. On the other hand, the physical phases are composed of sequential read and write operations entirely. They are a mixture of 32 K and 64 K OP sizes.
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