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| Content Provider | ACM Digital Library |
|---|---|
| Author | Tucek, Joseph Qin, Feng Zhou, Yuanyuan Sundaresan, Jagadeesan |
| Abstract | Many applications demand availability. Unfortunately, software failures greatly reduce system availability. Prior work on surviving software failures suffers from one or more of the following limitations: Required application restructuring, inability to address deterministic software bugs, unsafe speculation on program execution, and long recovery time.This paper proposes an innovative safe technique, called Rx, which can quickly recover programs from many types of software bugs, both deterministic and non-deterministic. Our idea, inspired from allergy treatment in real life, is to rollback the program to a recent checkpoint upon a software failure, and then to re-execute the program in a modified environment. We base this idea on the observation that many bugs are correlated with the execution environment, and therefore can be avoided by removing the "allergen" from the environment. Rx requires few to no modifications to applications and provides programmers with additional feedback for bug diagnosis.We have implemented RX on Linux. Our experiments with four server applications that contain six bugs of various types show that RX can survive all the six software failures and provide transparent fast recovery within 0.017-0.16 seconds, 21-53 times faster than the whole program restart approach for all but one case (CVS). In contrast, the two tested alternatives, a whole program restart approach and a simple rollback and re-execution without environmental changes, cannot successfully recover the three servers (Squid, Apache, and CVS) that contain deterministic bugs, and have only a 40% recovery rate for the server (MySQL) that contains a non-deterministic concurrency bug. Additionally, RX's checkpointing system is lightweight, imposing small time and space overheads. |
| Starting Page | 235 |
| Ending Page | 248 |
| Page Count | 14 |
| File Format | |
| ISSN | 01635980 |
| DOI | 10.1145/1095809.1095833 |
| Journal | ACM SIGOPS Operating Systems Review (OPSR) |
| Volume Number | 39 |
| Issue Number | 5 |
| Language | English |
| Publisher | Association for Computing Machinery (ACM) |
| Publisher Date | 1975-04-01 |
| Publisher Place | New York |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Availability Bug Reliability Software failure |
| Content Type | Text |
| Resource Type | Article |
| Subject | Computer Networks and Communications Hardware and Architecture Information Systems |
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