Transactions , Messages and Events : Merging Group Communication and Database Systems – extended
نویسندگان
چکیده
In this paper, we report on the DRAGON (Database Replication on Group Communication) project and the results obtained so far at ETH Zürich. The goal of DRAGON is to improve database replication strategies by using group communication primitives. As a first step in this direction, we have developed a suite of protocols implementing database replication based on broadcast primitives. We are currently embedding these protocols into a database management system to show the feasibility of the approach. In this short paper, we briefly discuss these protocols and analyze how they can be included in a database system. Our contribution is to further clarify the effort involved in the process and to explicitly state some of the issues commonly not considered by existing work. These issues are analyzed in detail and solutions are provided taking as example our current development efforts.
منابع مشابه
A Distributed Group Commit Protocol for Distributed Database Systems
This paper identiies the problems of the group commit protocol for the distributed main memory database systems, and presents a distributed group commit protocol. In the proposed protocol, a consistent set of transactions which have to be committed together is identiied during the normal transaction processing, by propagating the transaction precedence relations as the normal transaction messag...
متن کاملOnline Reconfiguration in Replicated Databases Based on Group Communication
Over the last years, many replica control protocols have been developed that take advantage of the ordering and reliability semantics of group communication primitives to simplify database system design and to improve performance. Although current solutions are able to mask site failures effectively, many of them are unable to cope with recovery of failed sites, merging of partitions, or joinin...
متن کاملRecovery in Distributed Extended Long-lived Transaction Models
This paper addresses the recovery and the rollback problem in distributed collaborative transactions. We propose a solution to the problem in a generalized ARIES [9] framework. We modified its existing data structures and provided additional data structures for recovery of distributed extended long-lived transactions. In the proposed model the transactions communicate and collaborate only by ex...
متن کاملUsing Optimistic Atomic Broadcast in Transaction Processing Systems
Atomic broadcast primitives are often proposed as a mechanism to allow fault tolerant cooperation between sites in a distributed system Unfortunately the delay incurred be fore a message can be delivered makes it di cult to implement high performance scalable applications on top of atomic broadcast primitives Recently a new approach has been proposed for atomic broadcast which based on optimist...
متن کاملModeling Lateral Communication in Holonic Multi Agent Systems
Agents, in a multi agent system, communicate with each other through the process of exchanging messages which is called dialogue. Multi agent organization is generally used to optimize agents’ communications. Holonic organization demonstrates a self-similar recursive and hierarchical structure in which each holon may include some other holons. In a holonic system, lateral communication occurs b...
متن کامل