Spring 2011

Preparation for Recitation 20

Read the paper Manageability, Availability and Performance in Porcupine: A Highly Scalable Internet Mail Service by Yasushi Saito, Brian Bershad and Hank Levy.

Answer the following question, and turn in your answer via the submission page, before the start of your recitation:

How do Porcupine nodes recover the 256-entry user map after a crash? What configurations might require a user map that contains more than 256 entries? Do you think the user map should still be soft state in those configurations?

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