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| Content Provider | ACM Digital Library |
|---|---|
| Author | Jagannathan, Suresh Ziarek, Lukasz Schatz, Philip |
| Abstract | Transient faults that arise in large-scale software systems can often be repaired by re-executing the code in which they occur. Ascribing a meaningful semantics for safe re-execution in multi-threaded code is not obvious, however. For a thread to correctly rexecute a region of code, it must ensure that all other threads which have witnessed its unwanted effects within that region are also reverted to a meaningful earlier state. If not done properly, data inconsistencies and other undesirable behavior may result. however, automatically determining what constitutes a consistent global checkpoint is not straightforward since thread interactions are a dynamic property of the program.In this paper, we present a safe and efficient checkpointing mechanism for Concurrent ML (CML) that can be used to recover from transient faults. We introduce a new linguistic abstraction called stabilizers that permits the specification of per-thread monitors and the restoration of globally consistent checkpoints. Safe global states are computed through lightweight monitoring of communication events among threads (e.g. message-passing operations or updates to shared variables).Our experimental results on several realistic, multithreaded, server-style CML applications, including a web server and a windowing toolkit, show that the overheads to use stabilizers are small, and lead us to conclude that they are a viable mechanism for defining safe checkpoints in concurrent functional programs. |
| Starting Page | 136 |
| Ending Page | 147 |
| Page Count | 12 |
| File Format | |
| ISBN | 1595933093 |
| DOI | 10.1145/1159803.1159822 |
| Language | English |
| Publisher | Association for Computing Machinery (ACM) |
| Publisher Date | 2006-09-17 |
| Publisher Place | New York |
| Access Restriction | Subscribed |
| Subject Keyword | Checkpointing Transactions Exception handling Concurrent ml Error recovery Concurrent programming |
| Content Type | Text |
| Resource Type | Article |
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