This paper argues that caching, atomicity and layering are fundamental to persistent systems, and that the transactional object cache architecture, as an embodiment of these concerns, provides a foundation for high performance persistent system construction. Central to the paper is a description of the semantics of an abstract transactional object cache architecture that supports a wide range o...

Transactions are contracts that guarantee a consistent, transparent, individual system state transition and their use is widespread in many different kinds of computing systems. Some well known standards (e.g. CORBA) include the specification of services that provide transactional properties. In this paper, we present a formal method for the systematic synthesis of transactional middleware base...

The transactional workkows (TWF) model can be regarded as a merging point of extended transaction models and general workkow model, it emphasizes both transactional aspect and business process aspect. In this report, we present a hierarchical approach for representing transactional workkows and discuss both transactional and business process aspects that a TWF should capture. We also introduce ...

I have adapted STAMP benchmarks [1] for use with the MPARM simulator in order to evaluate the performance of transactional cache configurations. We are primarily interested in evaluating energy consumption in multi-core mobile devices. There are two main hardware configurations being evaluated: a simple transactional cache (“vanilla TM”), and a victim cache configuration. In the vanilla configu...

It is generally agreed that one of the key services of componentbased systems are transactions. However, an agreement on how components should be involved in transactions is still missing. In this paper, we discuss some of the key issues of combining components with transactions, and different approaches to achieve an appropriate level of transactional functionality in components. We distinguis...

Transactional memory (TM) systems implement the concept of an atomic execution unit called transaction in order to discharge programmers from explicit synchronization management. But when shared data is atomically accessed by both transaction and non-transactional code, a TM system must provide strong isolation in order to overcome consistency problems. Strong isolation enforces ordering betwee...

In this paper we introduce TAS (Transactional Auto Scaler), a system that relies on a novel hybrid analytical/machine-learning-based forecasting methodology in order to accurately predict the performance achievable by transactional applications executing on top of transactional in-memory data stores, in face of changes of the scale of the system. Applications of TAS range from on-line selfoptim...

Noninjecting illicit drug users (NIDUs) present high risk for HIV infection, due especially to transactional sex. This study aimed to estimate the prevalence and risk factors for transactional sex among NIDUs in the Southwest region of Goiás State, Central Brazil. The prevalence of self-reported transactional sex was 22.8%. Prevalence in women and men was 52.7% and 16.8%, respectively, a signif...

BACKGROUND 'Transactional sex' was regarded by the mid-1990s as an important determinant of HIV transmission, particularly in sub-Saharan Africa. Little attention has been paid to what the terms used to denote transactional sex suggest about how it is understood. This study provides a nuanced set of descriptions of the meaning of transactional sex in three settings. Furthermore, we discuss how ...

In Service-Oriented Computing (SOC), a business transaction comprises of several web services provided by multiple enterprises. The transactional behaviour of individual web services must be considered for service selection so that the composition of web services results in a reliable execution. It is difficult for a business analyst to envisage the desired business policies of a process in ter...