Searcharxiv⌕ Search

arXiv subjects

Alejandro García-Fernández

Publications and source records attributed to Alejandro García-Fernández.

6 recordsLinked to original sources

Pricing-Driven Resource Allocation in the Computing Continuum

Deploying applications across the computing continuum requires selecting infrastructure nodes from geographically distributed and heterogeneous environments while satisfying constraints (e.g., performance, location). This decision problem is an important facet of resource allocation. As infrastructures grow in scale and heterogeneity, the resulting decision space becomes inherently combinatorial. Existing approaches typically formulate this problem as a constrained optimization task using ad-hoc representations of infrastructure topologies and demand, which hinders generalization across solutions. In contrast, Software as a Service ecosystems address a structurally similar configuration problem through pricings -structures whose plans and add-ons implicitly define the configuration space of possible subscriptions. Building on this observation, this work explores the potential of pricings as general-purpose representations of configuration spaces, positioning them as a promising alternative for addressing configuration problems, such as resource allocation, across the computing continuum. To this end, the paper presents the following contributions: i) a pricing-based formulation of the resource allocation problem in the computing continuum, enabling infrastructure configuration spaces to be represented using pricings; ii) a workflow that leverages PRIME, a pricing analysis engine, to explore these spaces and compute cost-optimal deployments satisfying functional and non-functional constraints; iii) generation processes for synthetic infrastructure topologies and workload demands; and iv) a dataset comprising 9,600 precomputed resource allocation scenarios to support benchmarking.

cs.SE↗

Automated Analysis of Pricings in SaaS-based Information Systems

Software as a Service (SaaS) pricing models, encompassing features, usage limits, plans, and add-ons, have grown exponentially in complexity, evolving from offering tens to thousands of configuration options. This rapid expansion poses significant challenges for the development and operation of SaaS-based Information Systems (IS), as manual management of such configurations becomes time-consuming, error-prone, and ultimately unsustainable. The emerging paradigm of Pricing-driven DevOps aims to address these issues by automating pricing management tasks, such as transforming human-oriented pricings into machine-oriented (iPricing) or finding the optimal subscription that matches the requirements of a certain user, ultimately reducing human intervention. This paper advances the field by proposing seven analysis operations that partially or fully support these pricing management tasks, thus serving as a foundation for defining new, more specialized operations. To achieve this, we mapped iPricings into Constraint Satisfaction Optimization Problems (CSOP), an approach successfully used in similar domains, enabling us to implement and apply these operations to uncover latent, yet non-trivial insights from complex pricing models. The proposed approach has been implemented in a reference framework using MiniZinc, and tested with over 150 pricing models, identifying errors in 35 pricings of the benchmark. Results demonstrate its effectiveness in identifying errors and its potential to streamline Pricing-driven DevOps.

cs.SE↗

HORIZON: a Classification and Comparison Framework for Pricing-driven Feature Toggling

Software as a Service (SaaS) has seen rapid growth in recent years, thanks to its ability to adapt to diverse user needs through subscription-based models. However, as pricing models enhance the customization of subscriptions, managing the associated constraints within a system's codebase becomes increasingly challenging. In response, Pricing-driven Development and Operation has emerged to integrate pricing considerations across the software lifecycle. Among its most challenging objectives is regulating feature access according to users' subscriptions -- a process that requires managing a multitude of conditions throughout the system's codebase. Feature toggles have traditionally been employed to manage dynamic system behavior, but their application to pricing-driven constraints presents unique challenges. When used to enforce subscription-based restrictions, toggles must adapt -- among other factors -- to individual user's use of features, ensuring that subscription limits are not exceeded. Despite the increasing significance of this problem, current industrial solutions lack explicit support for pricing-driven feature toggling, and existing academic contributions remain constrained to specific architectures. This paper contributes to fill this gap by introducing HORIZON, a classification and comparison framework for feature toggling tools tailored to pricing-driven environments. Its utility is demonstrated by categorizing the solutions identified in the literature as promising for such environments, revealing both their strengths and limitations, and thereby pinpointing critical avenues for improvement. In doing so, HORIZON not only provides a comprehensive view of the current landscape but also lays the groundwork for a focused research agenda, guiding the development of more robust and adaptable solutions for streamlining SaaS development and operations driven by pricings.

cs.SE↗

Pricing4SaaS: Towards a pricing model to drive the operation of SaaS

The Software as a Service (SaaS) model is a distribution and licensing model that leverages pricing structures and subscriptions to profit. The utilization of such structures allows Information Systems (IS) to meet a diverse range of client needs, while offering improved flexibility and scalability. However, they increase the complexity of variability management, as pricings are influenced by business factors, like strategic decisions, market trends or technological advancements. In pursuit of realizing the vision of pricing-driven IS engineering, this paper introduces Pricing4SaaS as a first step, a generalized specification model for the pricing structures of systems that apply the Software as a Service (SaaS) licensing model. With its proven expressiveness, demonstrated through the representation of 16 distinct popular SaaS systems, Pricing4SaaS aims to become the cornerstone of pricing-driven IS engineering.

cs.SE↗

Pricing4SaaS: a suite of software libraries for pricing-driven feature toggling

As the digital marketplace evolves, the ability to dynamically adjust or disable features and services in response to market demands and pricing strategies becomes increasingly crucial for maintaining competitive advantage and enhancing user engagement. This paper introduces a novel suite of software libraries named Pricing4SaaS, designed to facilitate the implementation of pricing-driven feature toggles in both the front-end and back-end of SaaS systems, and discuss its architectural design principles. Including Pricing4React for front-end and Pricing4Java for back-end, the suite enables developers a streamlined and efficient approach to integrating feature toggles that can be controlled based on pricing plans, emphasizing centralized toggle management, and secure synchronization of the toggling state between the client and server. We also present a case study based on the popular Spring PetClinic project to illustrate how the suite can be leveraged to optimize developer productivity, avoiding technical debt, and improving operational efficiency.

cs.SE↗

Pricing-driven Development and Operation of SaaS : Challenges and Opportunities

As the Software as a Service (SaaS) paradigm continues to reshape the software industry, a nuanced understanding of its operational dynamics becomes increasingly crucial. This paper delves into the intricate relationship between pricing strategies and software development within the SaaS model. Using PetClinic as a case study, we explore the implications of a Pricing-driven Development and Operation approach of SaaS systems, highlighting the delicate balance between business-driven decision-making and technical implementation challenges, shedding light on how pricing plans can shape software features and deployment. Our discussion aims to provide strategic insights for the community to navigate the complexities of this integrated approach, fostering a better alignment between business models and technological capabilities for effective cloud-based services.

cs.SE↗