DocumentCode :
2302896
Title :
Recovery-management in the RelaX distributed transaction layer
Author :
Schumann, R. ; Kröger, R. ; Mock, M. ; Nett, E.
Author_Institution :
Gesellschaft fuer Mathematik und Datenverarbeitung, St. Augustin, West Germany
fYear :
1989
fDate :
10-12 Oct 1989
Firstpage :
21
Lastpage :
28
Abstract :
Transactions are especially valuable in distributed systems, since they isolate the programmer from the effects of both concurrency and failures. In implementing transactions at the system level, flexibility has to be introduced into the transaction concept. Specifically, the premature release of data objects has to be addressed. To assure recoverability, resulting dependencies between transactions are stored by the system in a distributed data structure called a recovery graph. The storing of redundant information in the recovery graphs at the different sites reduces the complexity of the commit protocol, and a chase protocol used to abort transactions can be derived which excludes infinite chasing. The redundant information can be distributed almost for free because it can be piggybacked on messages. The new commit/abort protocols will be used in the RelaX project (reliable distributed applications support on Unix), which carries on work done at GMD in the PROFEMO project on distributed transaction mechanisms
Keywords :
distributed processing; fault tolerant computing; network operating systems; system recovery; transaction processing; GMD; PROFEMO project; Unix; chase protocol; commit protocol; concurrency; data objects; distributed data structure; distributed systems; distributed transaction mechanisms; failures; programmer; recoverability; recovery graph; redundant information; transactions; Concurrency control; Concurrent computing; Data structures; Fault tolerant systems; Phase detection; Programming profession; Protocols; Prototypes; Redundancy; Resource management;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Reliable Distributed Systems, 1989., Proceedings of the Eighth Symposium on
Conference_Location :
Seattle, WA
Print_ISBN :
0-8186-1981-3
Type :
conf
DOI :
10.1109/RELDIS.1989.72745
Filename :
72745
Link To Document :
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