Spring 2012

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.

As you are reading the paper, think about the following question:

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?

Questions or comments regarding 6.033? Send e-mail to the 6.033 staff at or to the 6.033 TAs at .

Top // 6.033 home //