Preparation for Recitation on ZFS

Read The Zettabyte File System. It was published in the Usenix Symposium on File and Storage Technologies in 2003. This is your third file system; you have now read about the Unix Filesystem, GFS, and now ZFS.

The Introduction of the paper highlights the goals of the system and Section 2 discusses what the authors identify as their design principles. Section 3 describes their design, both the supporting elements and their approach to providing the POSIX layer. POSIX is the "Portable Operating System Interface" standardized by the IEEE for providing compatibility with various versions of Unix. Section 4 considers several use scenarios, although Section 5, in discussing design tradeoffs identities several key issues that are not considered in Section 4.The paper concludes with several brief sections on related work, future work, the current status and conclusions.

As you read the paper, consider the following questions:

Question for Recitation

Before you come to this recitation, write up (on paper) a brief answer to the following (really—we don't need more than a couple sentences for each question). If your TA has requested that you email your answer to them, you may do that instead, but it should still be handed in before your recitation begins.

Your answers to these questions should be in your own words, not direct quotations from the paper.

As always, there are multiple correct answers for each of these questions.