Question 1. • We studied three types of logging strategies in class: physical, logical, and physiological. Briefly (1-2 lines) explain the difference between the three logging strategies. • Consider recovery algorithms for transaction aborts and system restart that are based on logging. These recovery algorithms require that log records for a transaction must be forced to disk when a transactio...

Transaction management is the key component of process-sensitive engineering environments (PSEE). In recent years, several advanced transaction models have been proposed to support long transaction. However, in view of specific characteristic in software process transaction, those models only meet its partial requirements. Moreover, no commercial or academic results of nested cooperative transa...

In this paper, we present a mechanism to specify and to validate consistency constraints in object oriented databases. Constraints are speciied using pre and post-conditions associated with an exception handling mechanism. During transaction run-time, we treat exceptions corresponding to errors (in this case, we use immediate exceptions which are processed immediately) or presumption of errors ...

In Bitcoin system, transactions are prioritized according to attributes such as the remittance amount and transaction fees, and transactions with low priority are likely to wait for confirmation. Because the demand of micro payment in Bitcoin is expected to increase due to low remittance cost, it is important to quantitatively investigate how the priority mechanism of Bitcoin affects the transa...

Synchronisation and Coordination (Part 2) Transactions A transaction can be regarded as a set of server operations that are guaranteed to appear atomic in the presence of multiple clients and partial failure. The concept of a transaction originates from the database community as a mechanism to maintain the consistency of databases. Transaction management is build around two basic operations: Be...

For enterprise systems to interoperate, as in an e-business transaction, some kind of transaction management is crucial. Current standard transaction protocols do not meet the requirements for e-business transactions. In this paper, a new transaction model is introduced that meets those requirements and for which well-defined business semantics can be given.

Mobile devices that host embedded database systems are becoming a commonality. Transaction management is needed to provide mobile data availability and transaction processing functionality during disconnection periods. In this paper, we present an adaptation of the transaction correctness criterion GSI to mobile networks that reduces the number of message exchanged per transaction. We discuss t...

Non-standard database applications like design environments or office automation require advanced transaction concepts. The inability of traditional transactions [2] to support such applications has already been observed by [6] and was the motivation for the development of a number of non-standard transaction models (for an overview, see [1] or [5]). Our work focuses on transaction management i...

Agrifood supply networks are dynamic structures where firms regularly face the need to search for new market partners. A decision for a transaction with a new partner requires the existence of appropriate control and safeguard mechanisms as well as trust to overcome perceived risk and uncertainties. Electronic transaction environments offer new potentials for the identification of new transacti...