CprFS: a user-level file system to support consistent file states for checkpoint and restart
Proceedings of the 22nd annual international conference on Supercomputing
Optimization models for application migration to support mobile thin clients
Proceedings of the Third international EURO-NGI network of excellence conference on Wireless systems and mobility in next generation internet
Grid design for mobile thin client computing
Future Generation Computer Systems
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We present a new distributed checkpoint-restart mechanism, Cruz, that works without requiring application, library, or base kernel modifications. This mechanism provides comprehensive support for checkpointing and restoring application state, both at user level and within the OS. Our implementation builds on Zap, a process migration mechanism, implemented as a Linux kernel module, which operates by interposing a thin layer between applications and the OS. In particular, we enable support for networked applications by adding migratable IP and MAC addresses, and checkpoint-restart of socket buffer state, socket options, and TCP state. We leverage this capability to devise a novel method for coordinated checkpoint-restart that is simpler than prior approaches. For instance, it eliminates the need to flush communication channels by exploiting the packet re-transmission behavior of TCP and existing OS support for packet filtering. Our experiments show that the overhead of coordinating checkpoint-restart is negligible, demonstrating the scalability of this approach.