Linux Symposium, July 13th - 17th, 2009, Montreal, Canada
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July 13-17, 2009

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Incremental Checkpointing for Grids

John Mehnert-Spahn (john.mehnert-spahn@uni-duesseldorf.de)

The EU-funded project XtreemOS implements an open-source Linux-based grid operating system. Here checkpointing (CP) is used to implement fault tolerance and process migration. We have developed an incremental CP solution for saving only memory pages that have been changed since the last CP. We will present how we keep track of memory page modifications between CPs using Linux-native radix trees and how we handle virtual memory area changes. We will also provide experiment results with selected examples. We will present a new Linux connector transparently reporting application page modifications to user mode in order to adaptively control incremental CP at the grid level.

In collaboration with Eugen Feller and Michael Schoettner, University of Duesseldorf.



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