Show Student Project Improving RAIDframe parity handling for The NetBSD Project

• Google Open Source Programs
  • Site
    • Home
  • User (self)
    • Sign In
  • Programs
    • GSoC 2009
      • Home
      • Frequently Asked Questions
      • Admin & Mentor Participant Agreement
      • Press Guidelines
      • Student Participant Agreement
      • Student Info
      • Testing Guide
      • Timeline
      • Program Terms of Service
      • User's Guide
      • List participating Organizations
      • List all Student Projects
    • GSoC 2010
      • Home
      • Frequently Asked Questions
      • Home
      • Admin & Mentor Participant Agreement
      • Student Participant Agreement
      • Program Terms of Service

Release 0-6-20100201

Student Name:	Jed Davis
Mentor Name:	greg oster
Title:	Improving RAIDframe parity handling
Abstract:	If a NetBSD system using a software RAID device loses power or crashes, a lengthy (many hours, for today's disk sizes) and I/O-intensive parity rewrite is required afterwards. I propose to modify the raid(4) driver to remove this deficiency — which may be discouraging the use of NetBSD in server applications — by more closely tracking which parity information actually needs to be recomputed. In addition, some less major shortcomings of raid(4) could be addressed at the same time.