| Replication in the Harp File System (1995) | |||||||||||||||||
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| technique [1, 26, 27]. In this method, client calls are directed to a single primary server, which communicates This paper describes the design and implementation of the with other backup servers and waits for them to respond Harp file system. Harp is a replicated Unix file system before replying to the client. The system masks failures by accessible via the VFS interface. It provides highly availperforming a failover algorithm in which an inaccessible able and reliable storage for files and guarantees that file server is removed from service. When a primary performs operations are executed atomically in spite of concurrency an operation, it must inform enough backups to guarantee and failures. It uses a novel variation of the primary copy that the effects of that operation will survive all subsequent replication technique that provides good performance befailovers. cause it allows us to trade disk accesses for network comHarp is one of the first implementations of a primary municatio... | |||||||||||||||||
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