A resilient replication method in distributed database systems
Conference
·
OSTI ID:5726362
Replication is a key factor in improving data availability in distributed systems. Replicated data is stored redundantly at multiple sites so that it can be used by transactions even when some of the copies are not available due to site failures. A major restriction in using replication is that replicated copies must behave like a single copy, i.e., mutual consistency as well as internal consistency must be preserved. This paper introduces a scheme for maintaining consistency and improving resiliency of replicated data in distributed systems. A multiversion technique is used to increase the degree of concurrency. To reduce storage requirement and communication overhead, multiple versions are maintained only at read-on sites. Recovery methods for replicated data in distributed systems are discussed. 24 refs.
- Research Organization:
- Virginia Univ., Charlottesville, VA (USA). Dept. of Computer Science
- Sponsoring Organization:
- DOD; DOE; Department of Defense, Washington, DC (USA); USDOE, Washington, DC (USA)
- DOE Contract Number:
- FG05-88ER25063
- OSTI ID:
- 5726362
- Report Number(s):
- CONF-8904415-1; ON: DE91014341; CNN: N00014-86-K-0245
- Country of Publication:
- United States
- Language:
- English
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