Homework: Reading questions

Submit two items to the submission website (see link in the navigation bar at the top of the page):

Submit your own question about the paper (e.g., what you find most confusing about the paper or the paper's general context/problem), before lecture (i.e., 1pm). You cannot use the question below. To the extent possible, during lecture we will try to answer questions submitted beforehand.
Submit your answer for the question below, before the beginning of the lecture.

Answer the following question:

A challenge for the SibylFS authors is that there exists no reference implementation of POSIX, but there are many file systems that implement something that is close to POSIX. To allow for different implementations, the SibylFS's specification is non-deterministic in several areas. Give an example of such a non-determinism in the SibylFS specification and explain what degrees of freedom it provides to file-system implementors.

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