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As the cloud era begins, the fate and destiny of availability, reliability and performance are in the hands of failure recovery. Unfortunately, recovery problems still take place, causing downtimes, data loss, and many other problems. We propose a new testing framework for cloud recovery: FATE (Failure Testing Service) and DESTINI (Declarative Testing Specifications). With FATE, recovery is systematically tested against multiple failures. With DTS, recovery is specified clearly, concisely, and precisely. We have deployed our framework to three cloud systems (HDFS, ZooKeeper, and Cassandra), explored over 40,000 failure scenarios, wrote 74 specifications, found 16 new bugs, and reproduced 51 old bugs.

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