@inproceedings {INPROC-2014-61,
author = {Marina Bitsaki and Christos Koutras and Georgios Koutras and Frank Leymann and Bernhard Mitschang and Christos Nikolaou and Nikos Siafakas and Steve Strauch and Nikos Tzanakis and Matthias Wieland},
title = {{An Integrated mHealth Solution for Enhancing Patients' Health Online}},
booktitle = {Proceedings of the 6th European Conference of the International Federation for Medical and Biological Engineering (MBEC'14)},
publisher = {International Federation for Medical and Biological Engineering (IFMBE)},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {1--4},
type = {Konferenz-Beitrag},
month = {September},
year = {2014},
keywords = {Patient monitoring; COPD; ICT application services; Cloud technology; Online services; Mobile applications; Intelligent data mining},
language = {Englisch},
cr-category = {C.2.4 Distributed Systems,
H.2.8 Database Applications,
H.4.1 Office Automation,
J.3 Life and Medical Sciences},
ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2014-61/INPROC-2014-61.pdf},
contact = {a href=``http://www.iaas.uni-stuttgart.de/institut/mitarbeiter/strauch''Steve Strauch/ a},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Anwendersoftware;
Universit{\"a}t Stuttgart, Institut f{\"u}r Architektur von Anwendungssystemen},
abstract = {Lack of time or economic difficulties prevent chronic obstructive pulmonary
disease patients from communicating with their physicians, thus inducing
exacerbation of their chronic condition and possible hospitalization. In this
paper we propose a platform that integrates mobile application technologies and
cloud computing to provide regular monitoring of patients and avoidance of
medical emergencies.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2014-61&engl=0}
}
@inproceedings {INPROC-2014-27,
author = {Santiago G{\'o}mez S{\'a}ez and Vasilios Andrikopoulos and Frank Leymann and Steve Strauch},
title = {{Towards Dynamic Application Distribution Support for Performance Optimization in the Cloud}},
booktitle = {Proceedings of the 7th IEEE International Conference on Cloud Computing (IEEE CLOUD 2014); Alaska, USA, June 27 - July 2, 2014},
publisher = {IEEE Computer Society},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {248--255},
type = {Konferenz-Beitrag},
month = {Juni},
year = {2014},
keywords = {Synthetic Workload; Benchmark; Application Distribution; Application Deployment; Relational Database; TPC; Database-as-a-Service (DBaaS)},
language = {Englisch},
cr-category = {D.2.11 Software Engineering Software Architectures,
C.2.4 Distributed Systems,
D.2.8 Software Engineering Metrics},
contact = {Santiago G{\'o}mez S{\'a}ez: gomez-saez@iaas.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Architektur von Anwendungssystemen},
abstract = {The Cloud computing paradigm emerged by establishing new resources provisioning
and consumption models. Together with the improvement of resource management
techniques, these models have contributed to an increase in the number of
application developers that are strong supporters of partially or completely
migrating their application to a highly scalable and pay-per-use
infrastructure. In this paper we derive a set of functional and non-functional
requirements and propose a process-based approach to support the optimal
distribution of an application in the Cloud in order to handle fluctuating over
time workloads. Using the TPC-H workload as the basis, and by means of
empirical workload analysis and characterization, we evaluate the application
persistence layer's performance under different deployment scenarios using
generated workloads with particular behavior characteristics.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2014-27&engl=0}
}
@inproceedings {INPROC-2014-06,
author = {Steve Strauch and Vasilios Andrikopoulos and Santiago G{\'o}mez S{\'a}ez and Frank Leymann},
title = {{Transparent Access to Relational Databases in the Cloud Using a Multi-Tenant ESB}},
booktitle = {Proceedings of the 4th International Conference on Cloud Computing and Service Science (CLOSER'14)},
publisher = {SciTePress},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {5--14},
type = {Konferenz-Beitrag},
month = {April},
year = {2014},
keywords = {Data Access Layer; Relational Databases; Enterprise Service Bus (ESB); Multi-Tenancy},
language = {Englisch},
cr-category = {C.2.4 Distributed Systems,
C.4 Performance of Systems,
D.2.11 Software Engineering Software Architectures,
H.2.0 Database Management General,
H.2.4 Database Management Systems},
contact = {a href=``http://www.iaas.uni-stuttgart.de/institut/mitarbeiter/strauch''Steve Strauch/ a},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Architektur von Anwendungssystemen},
abstract = {In the last years Cloud computing has become popular among IT organizations
aiming to reduce their operational costs. Applications can be designed to run
in the Cloud, or can be partially or completely migrated to it. Migrating the
data layer of an application to the Cloud, however, implies that existing
applications might need to be adapted in order to access their migrated to the
Cloud databases. In this work we examine how we can use an existing ESB to
enable transparent access to the relational data store running either in the
Cloud or on-premise. The goal of our approach is to minimize the effort
required to adapt the application. In particular, we discuss the requirements
and prototype realization of a Cloud aware data access layer for transparent
data access, using an existing open source and multi-tenant aware ESB as the
basis. We then evaluate the performance of our proposed solution by considering
different Cloud providers and using example data from an existing benchmark as
application workload.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2014-06&engl=0}
}
@inproceedings {INPROC-2014-02,
author = {Santiago G{\'o}mez S{\'a}ez and Vasilios Andrikopoulos and Frank Leymann and Steve Strauch},
title = {{Evaluating Caching Strategies for Cloud Data Access using an Enterprise Service Bus}},
booktitle = {Proceedings of the IEEE International Conference on Cloud Engineering (IEEE IC2E 2014)},
address = {Boston, Massachusetts, USA},
publisher = {IEEE Computer Society},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {289--294},
type = {Konferenz-Beitrag},
month = {M{\"a}rz},
year = {2014},
keywords = {Multi-tenancy; Enterprise Service Bus (ESB); Cache; Relational Databases},
language = {Englisch},
cr-category = {C.2.4 Distributed Systems,
H.3.4 Information Storage and Retrieval Systems and Software},
contact = {E-Mail: santiago.gomez-saez@iaas.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Architektur von Anwendungssystemen},
abstract = {Nowadays different Cloud services enable enterprises to migrate applications to
the Cloud. An application can be partially migrated by replacing some of its
components with Cloud services, or by migrating one or multiple of its layers
to the Cloud. As a result, accessing application data stored off-premise
requires mechanisms to mitigate the negative impact on Quality of Service
(QoS), e.g. due to network latency. In this work, we propose and realize an
approach for transparently accessing data migrated to the Cloud using a
multi-tenant open source Enterprise Service Bus (ESB) as the basis.
Furthermore, we enhance the ESB with QoS awareness by integrating it with an
open source caching solution. For evaluation purposes we generate a
representative application workload using data from the TPC-H benchmark. Based
on this workload, we then evaluate the optimal caching strategy among multiple
eviction algorithms when accessing relational databases located at different
Cloud providers.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2014-02&engl=0}
}
@inproceedings {INPROC-2014-01,
author = {Johannes Wettinger and Vasilios Andrikopoulos and Steve Strauch and Frank Leymann},
title = {{Characterizing and Evaluating Different Deployment Approaches for Cloud Applications}},
booktitle = {Proceedings of the IEEE International Conference on Cloud Engineering (IC2E 2014)},
publisher = {IEEE Computer Society},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {205--214},
type = {Konferenz-Beitrag},
month = {M{\"a}rz},
year = {2014},
language = {Englisch},
cr-category = {D.2.11 Software Engineering Software Architectures,
K.6 Management of Computing and Information Systems},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Architektur von Anwendungssystemen},
abstract = {Fully automated provisioning and deployment in order to reduce the costs for
managing applications is one of the most essential requirements to make use of
the benefits of Cloud computing. Several approaches and tools are available to
automate the involved processes. The DevOps community, for example, provides
tooling and artifacts to realize deployment automation on Infrastructure as a
Service level in a mostly application-oriented manner. Platform as a Service
frameworks are also available for the same purpose. In this paper we categorize
and characterize available deployment approaches independently from the
underlying technology used. For this purpose, we choose Web applications with
different technology stacks and analyze their specific deployment requirements.
Afterwards, we provision these applications using each of the identified types
of deployment approaches in the Cloud. Finally, we discuss the evaluation
results and derive recommendations which deployment approach to use based on
the deployment requirements of an application.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2014-01&engl=0}
}
@inproceedings {INPROC-2013-56,
author = {Steve Strauch and Vasilios Andrikopoulos and Bachmann Thomas and Dimka Karastoyanova and Stephan Passow and Karolina Vukojevic-Haupt},
title = {{Decision Support for the Migration of the Application Database Layer to the Cloud}},
booktitle = {Proceedings of the 5th IEEE International Conference on Cloud Computing Technology and Science (CloudCom'13)},
publisher = {IEEE Computer Society Press},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {639--646},
type = {Konferenz-Beitrag},
month = {Dezember},
year = {2013},
doi = {10.1109/CloudCom.2013.90},
keywords = {Data Migration; Decision Support; Database layer; Application Refactoring},
language = {Englisch},
cr-category = {D.2.11 Software Engineering Software Architectures,
H.3.4 Information Storage and Retrieval Systems and Software},
contact = {a href=``http://www.iaas.uni-stuttgart.de/institut/mitarbeiter/strauch''Steve Strauch/ a},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Architektur von Anwendungssystemen},
abstract = {Migrating an existing application to the Cloud is a complex and
multi-dimensional problem requiring in many cases adapting the application in
significant ways. Looking specifically into the database layer of the
application, i.e. the aspect providing data persistence and manipulation
capabilities, this involves dealing with differences in the granularity of
interactions, refactoring of the application to cope with remote data sources,
and addressing data confidentiality concerns. Toward this goal, in this work we
present an application migration methodology which incorporates these aspects,
and a decision support, application refactoring and data migration tool that
assists application developers in realizing this methodology. For purposes of
evaluating our proposal we present the results of a case study conducted in the
context of an eScience project.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2013-56&engl=0}
}
@inproceedings {INPROC-2013-41,
author = {Steve Strauch and Vasilios Andrikopoulos and Santiago G{\'o}mez S{\'a}ez and Frank Leymann},
title = {{Implementation and Evaluation of a Multi-tenant Open-Source ESB}},
booktitle = {Proceedings of the 2nd European Conference on Service-Oriented and Cloud Computing (ESOCC'13)},
editor = {Lau Kung-Kiu and Lamersdorf Winfried and Pimentel Ernesto},
publisher = {Springer Berlin Heidelberg},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {Lecture Notes in Computer Science (LNCS)},
volume = {8135},
pages = {79--93},
type = {Konferenz-Beitrag},
month = {September},
year = {2013},
isbn = {978-3-642-40650-8},
keywords = {Multi-tenancy; Enterprise Service Bus (ESB); ESB benchmarking; JBI specification; Platform as a Service},
language = {Englisch},
cr-category = {C.2.4 Distributed Systems},
contact = {a href=``http://www.iaas.uni-stuttgart.de/institut/mitarbeiter/strauch''Steve Strauch/ a},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Architektur von Anwendungssystemen},
abstract = {Offering applications as a service in the Cloud builds on the notion of
application multi-tenancy. Multi-tenancy, the sharing of application instances
and their underlying resources between users from different organizational
domains, allows service providers to maximize resource utilization and reduce
servicing costs per user. Realizing application multi-tenancy however requires
suitable enabling mechanisms offered by their supporting middleware.
Furthermore, the middleware itself can be multi-tenant in a similar fashion. In
this work we focus on enabling multi-tenancy for one of the most important
components in service-oriented middleware, the Enterprise Service Bus (ESB). In
particular, we discuss the prototype realization of a multi-tenant aware ESB,
using an open source solution as the basis. We then evaluate the performance of
our proposed solution by an ESB-specific benchmark that we extended for
multi-tenancy purposes.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2013-41&engl=0}
}
@inproceedings {INPROC-2013-21,
author = {Johannes Wettinger and Vasilios Andrikopoulos and Steve Strauch and Frank Leymann},
title = {{Enabling Dynamic Deployment of Cloud Applications Using a Modular and Extensible PaaS Environment}},
booktitle = {Proceedings of the 6th International Conference on Cloud Computing (CLOUD 2013)},
editor = {IEEE Computer Society},
publisher = {IEEE Computer Society},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {478--485},
type = {Konferenz-Beitrag},
month = {Juli},
year = {2013},
keywords = {Middleware Abstraction; Infrastructure Abstraction; Middleware-oriented Deployment; PaaS Model; Cloud Computing},
language = {Englisch},
cr-category = {D.2.11 Software Engineering Software Architectures,
K.6 Management of Computing and Information Systems},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Architektur von Anwendungssystemen},
abstract = {The Platform as a Service (PaaS) model promotes the development and deployment
of applications on top of middleware solutions offered by the provider.
Deploying an application in this model entails both the deployment of the
application on top of the platform, but potentially also the deployment of the
middleware components required by the application. Existing works enable the
abstraction from the underlying infrastructure and allow for the creation of
generic deployment plans for middleware components that automate the deployment
of applications. In this paper we propose a middleware-oriented deployment
approach that defines how the deployment of middleware components can be
defined in a manner that allows to offer them as PaaS building blocks, and
enable the automatic deployment of application components on them. We also
present an evaluation of our proposal, together with the lessons learned during
this activity.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2013-21&engl=0}
}
@inproceedings {INPROC-2013-18,
author = {Vasilios Andrikopoulos and Steve Strauch and Frank Leymann},
title = {{Decision Support for Application Migration to the Cloud: Challenges and Vision}},
booktitle = {Proceedings of the 3rd International Conference on Cloud Computing and Service Science (CLOSER'13)},
publisher = {SciTePress},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {1--7},
type = {Konferenz-Beitrag},
month = {Mai},
year = {2013},
keywords = {Application migration; decision support; Cloud-enabling applications},
language = {Englisch},
cr-category = {C.2.4 Distributed Systems,
D.2.11 Software Engineering Software Architectures},
contact = {a href=``http://www.iaas.uni-stuttgart.de/institut/mitarbeiter/andrikopoulos''Vasilios Andrikopoulos/ a},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Architektur von Anwendungssystemen},
abstract = {The success of Cloud computing has encouraged many application developers to
consider migrating their applications to the Cloud. Given the early market
dominance of the IaaS service model, many existing works focus on selecting the
best service provider for a set of criteria related to the virtualization and
hosting of the application. In this work, we aim to progress the State of the
Art by formulating a vision of a decision support system that incorporates
multiple dimensions and different analysis tasks in feedback relationships with
each other. The research challenges that need to be addressed towards this
direction are identified and related to the different aspects of migration of
applications to the various Cloud service models.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2013-18&engl=0}
}
@inproceedings {INPROC-2013-17,
author = {Steve Strauch and Vasilios Andrikopoulos and Uwe Breitenb{\"u}cher and Santiago G{\'o}mez S{\'a}ez and Oliver Kopp and Frank Leymann},
title = {{Using Patterns to Move the Application Data Layer to the Cloud}},
booktitle = {Proceedings of the 5th International Conference on Pervasive Patterns and Applications (PATTERNS'13)},
publisher = {Xpert Publishing Services},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {26--33},
type = {Konferenz-Beitrag},
month = {Mai},
year = {2013},
keywords = {Data layer; Cloud applications; Data migration; Cloud Data Patterns; Cloud data stores},
language = {Englisch},
cr-category = {C.2.4 Distributed Systems,
D.2.11 Software Engineering Software Architectures,
H.3.4 Information Storage and Retrieval Systems and Software},
contact = {a href=``http://www.iaas.uni-stuttgart.de/institut/mitarbeiter/strauch''Steve Strauch/ a},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Architektur von Anwendungssystemen},
abstract = {Cloud services allow for hosting applications partially or completely in the
Cloud by migrating their components and data. Especially with respect to data
migration, a series of functional and non-functional challenges like data
confidentiality arise when considering private and public Cloud data stores. In
this paper we identify some of these challenges and propose a set of reusable
solutions for them, organized together as a set of Cloud Data Patterns.
Furthermore, we show how these patterns may impact the application architecture
and demonstrate how they can be used in practice by means of a use case.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2013-17&engl=0}
}
@inproceedings {INPROC-2013-16,
author = {Steve Strauch and Vasilios Andrikopoulos and Thomas Bachmann and Frank Leymann},
title = {{Migrating Application Data to the Cloud Using Cloud Data Patterns}},
booktitle = {Proceedings of the 3rd International Conference on Cloud Computing and Service Science (CLOSER'13)},
publisher = {SciTePress},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {36--46},
type = {Konferenz-Beitrag},
month = {Mai},
year = {2013},
keywords = {application data migration; Cloud Data Patterns; Cloud Migration Scenarios; application refactoring},
language = {Englisch},
cr-category = {C.2.4 Distributed Systems,
D.2.11 Software Engineering Software Architectures,
H.3.4 Information Storage and Retrieval Systems and Software},
contact = {a href=``http://www.iaas.uni-stuttgart.de/institut/mitarbeiter/strauch''Steve Strauch/ a},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Architektur von Anwendungssystemen},
abstract = {Taking advantage of the capabilities offered by Cloud computing requires either
an application to be built specifically for it, or for existing applications to
be migrated to it. In this work we focus on the latter case, and in particular
on migrating the application data. Migrating data to the Cloud creates a series
of technical, architectural and legal challenges that the State of the Art
attempts to address. We organize such efforts into a set of migration scenarios
and connect them with a list of reusable solutions for the application data
migration in the form of patterns. From there we define an application data
migration methodology and we demonstrate how it can be used in practice.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2013-16&engl=0}
}
@inproceedings {INPROC-2012-47,
author = {Steve Strauch and Vasilios Andrikopoulos and Uwe Breitenb{\"u}cher and Oliver Kopp and Leymann Frank},
title = {{Non-Functional Data Layer Patterns for Cloud Applications}},
booktitle = {Proceedings of the 4th IEEE International Conference on Cloud Computing Technology and Science (CloudCom'12)},
publisher = {IEEE Computer Society Press},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {601--605},
type = {Konferenz-Beitrag},
month = {Dezember},
year = {2012},
keywords = {data layer; cloud applications; data migration; cloud data patterns; cloud data stores},
language = {Englisch},
cr-category = {C.2.4 Distributed Systems,
D.2.11 Software Engineering Software Architectures,
H.3.4 Information Storage and Retrieval Systems and Software},
contact = {a href=``http://www.iaas.uni-stuttgart.de/institut/mitarbeiter/strauch''Steve Strauch/ a},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Architektur von Anwendungssystemen},
abstract = {Cloud services allow for hosting applications partially or completely in the
Cloud by migrating their components and data. Especially with respect to data
migration, a series of functional and non-functional challenges like data
confidentiality arise when considering private and public Cloud data stores. In
this paper we identify some of these challenges and propose a set of reusable
solutions focusing on the non-functional aspects, organized together as a set
of Cloud Data Patterns.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2012-47&engl=0}
}
@inproceedings {INPROC-2012-46,
author = {Steve Strauch and Vasilios Andrikopoulos and Frank Leymann and Dominik Muhler},
title = {{ESB^MT: Enabling Multi-Tenancy in Enterprise Service Buses}},
booktitle = {Proceedings of the 4th IEEE International Conference on Cloud Computing Technology and Science (CloudCom'12)},
publisher = {IEEE Computer Society Press},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {456--463},
type = {Konferenz-Beitrag},
month = {Dezember},
year = {2012},
keywords = {multi-tenancy; enterprise service bus; cloud-enabled middleware},
language = {Englisch},
cr-category = {C.2.4 Distributed Systems},
contact = {a href=``http://www.iaas.uni-stuttgart.de/institut/mitarbeiter/strauch''Steve Strauch/ a},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Architektur von Anwendungssystemen},
abstract = {Multi-tenancy is an essential property of Cloud computing. It helps service
providers to maximize resource utilization and reduce servicing costs per
customer. It is therefore important for key components of the contemporary
enterprise environment like the Enterprise Service Bus (ESB) to support and
enable multi-tenancy. For this purpose, in this work we investigate the
requirements for multi-tenant ESB solutions, propose an implementation-agnostic
ESB architecture that addresses these requirements, and discuss our
proof-of-concept realization of this architecture.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2012-46&engl=0}
}
@inproceedings {INPROC-2012-45,
author = {Steve Strauch and Vasilios Andrikopoulos and Santiago G{\'o}mez S{\'a}ez and Frank Leymann and Dominik Muhler},
title = {{Enabling Tenant-Aware Administration and Management for JBI Environments}},
booktitle = {Proceedings of the 5th International Conference on Service-Oriented Computing and Applications (SOCA'12)},
publisher = {IEEE Computer Society Conference Publishing Services},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {206--213},
type = {Konferenz-Beitrag},
month = {Dezember},
year = {2012},
isbn = {978-1-4673-4775-4},
keywords = {Multi-tenancy; Enterprise Service Bus (ESB); JBI specification; Platform as a Service},
language = {Englisch},
cr-category = {C.2.4 Distributed Systems,
C.4 Performance of Systems,
D.2.11 Software Engineering Software Architectures},
contact = {a href=``http://www.iaas.uni-stuttgart.de/institut/mitarbeiter/strauch''Steve Strauch/ a},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Architektur von Anwendungssystemen},
abstract = {Enterprise Service Buses (ESBs) constitute a core middleware technology for
each modern Service-Oriented Architecture (SOA) solution. Given the popularity
of the Cloud paradigm, which is based on fundamental SOA concepts, it is only
therefore natural to look into how ESBs can be transformed into native building
blocks for Cloud platforms. As a first step of this effort, in this work we
investigate how ESBs can become multi-tenant aware, i.e. able to support
multiple tenants and their users sharing the same ESB instance. A generalized
architecture based on the JBI specification implemented by a number of open
source ESBs is presented for this purpose. We demonstrate the feasibility of
our proposal by means of a proof of concept realization and we evaluate the
performance of our solution against a non multi-tenant ESB that was used as the
baseline for our implementation.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2012-45&engl=0}
}
@inproceedings {INPROC-2012-08,
author = {Steve Strauch and Uwe Breitenb{\"u}cher and Oliver Kopp and Frank Leymann and Tobias Unger},
title = {{Cloud Data Patterns for Confidentiality}},
booktitle = {Proceedings of the 2nd International Conference on Cloud Computing and Service Science (CLOSER'12)},
publisher = {SciTePress},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {387--394},
type = {Konferenz-Beitrag},
month = {April},
year = {2012},
keywords = {patterns; confidentiality; database layer; migration; distributed application architecture; cloud data store},
language = {Englisch},
cr-category = {C.2.4 Distributed Systems,
D.2.11 Software Engineering Software Architectures,
H.3.4 Information Storage and Retrieval Systems and Software},
contact = {a href=``http://www.iaas.uni-stuttgart.de/institut/mitarbeiter/strauch''Steve Strauch/ a},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Architektur von Anwendungssystemen},
abstract = {Cloud computing enables cost-effective, self-service, and elastic hosting of
applications in the Cloud. Applications may be partially or completely moved to
the Cloud. When hosting or moving the database layer to the Cloud, challenges
such as avoidance of disclosure of critical data have to be faced. The main
challenges are handling different levels of confidentiality and satisfying
security and privacy requirements. We provide reusable solutions in the form of
patterns.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2012-08&engl=0}
}
@inproceedings {INPROC-2011-71,
author = {Steve Strauch and Oliver Kopp and Frank Leymann and Tobias Unger},
title = {{A Taxonomy for Cloud Data Hosting Solutions}},
booktitle = {Proceedings of the International Conference on Cloud and Green Computing (CGC '11)},
publisher = {IEEE Computer Society},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {577--584},
type = {Konferenz-Beitrag},
month = {Dezember},
year = {2011},
doi = {10.1109/DASC.2011.106},
keywords = {cloud data hosting solution; taxonomy; distributed application architecture; database layer; cloud computing},
language = {Englisch},
cr-category = {C.2.4 Distributed Systems,
D.2.11 Software Engineering Software Architectures,
H.3.4 Information Storage and Retrieval Systems and Software},
contact = {steve.strauch@iaas.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Architektur von Anwendungssystemen},
abstract = {Cloud computing allows reducing capital expenditure by using resources on
demand. We investigate how to build a database layer in the Cloud and present
pure and hybrid Cloud data hosting solutions. The solutions are organized in a
taxonomy. The properties used for organization are: application layer,
deployment model, location, service model, data store type, and compatibility.
Using the taxonomy, existing Cloud data hosting solutions are categorized.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2011-71&engl=0}
}
@inproceedings {INPROC-2010-92,
author = {Aliaksandr Birukou and Vincenzo D'Andrea and Frank Leymann and Jacek Serafinski and Patr{\'\i}cia Silveira and Steve Strauch and Marek Tluczek},
title = {{An Integrated Solution for Runtime Compliance Governance in SOA}},
booktitle = {Proceedings of the 8th International Conference on Service-Oriented Computing (ICSOC'10), San Francisco, California, USA, December 7-10, 2010},
publisher = {Springer},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {122--136},
type = {Konferenz-Beitrag},
month = {Dezember},
year = {2010},
doi = {10.1007/978-3-642-17358-5_9},
keywords = {Compliance Governance, Business Process, Monitoring, SOA, Complex Event Processing},
language = {Englisch},
cr-category = {H.4.1 Office Automation},
contact = {Please send an e-mail to steve.strauch@iaas.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Architektur von Anwendungssystemen},
abstract = {In response to recent nancial scandals (e.g. those involving Enron, Fortis,
Parmalat), new regulations for protecting the society from nancial and
operational risks of the companies have been introduced. Therefore, companies
are required to assure compliance of their operations with those new
regulations as well as those already in place. Regulations are only one example
of compliance sources modern organizations deal with every day. Other sources
of compliance include licenses of business partners and other contracts,
internal policies, and international standards. The diversity of compliance
sources introduces the problem of compliance governance in an organization. In
this paper, we propose an integrated solution for runtime compliance governance
in Service-Oriented Architectures (SOAs). We show how the proposed solution
supports the whole cycle of compliance management: from modeling compliance
requirements in domain-speci c languages through monitoring them during process
execution to displaying information about the current state of compliance in
dashboards. We focus on the runtime part of the proposed solution and describe
it in detail.We apply the developed framework in a real case study coming from
EU FP7 project COMPAS, and this case study is used through the paper to
illustrate our solution.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2010-92&engl=0}
}
@inproceedings {INPROC-2010-75,
author = {David Schumm and Tobias Anstett and Frank Leymann and Daniel Schleicher and Steve Strauch},
title = {{Essential Aspects of Compliance Management with Focus on Business Process Automation}},
booktitle = {INFORMATIK 2010: Business Process and Service Science Proceedings of ISSS and BPSC},
editor = {Witold Abramowicz and Rainer Alt and Klaus-Peter F{\"a}hnrich and Bogdan Franczyk and Leszek A. Maciaszek},
publisher = {Gesellschaft f{\"u}r Informatik e.V. (GI)},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
series = {Lecture Notes in Informatics},
volume = {177},
pages = {127--138},
type = {Konferenz-Beitrag},
month = {September},
year = {2010},
language = {Englisch},
cr-category = {H.4.1 Office Automation},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Architektur von Anwendungssystemen},
abstract = {Compliance requirements coming from laws, regulations and internal policies
constrain how a company may carry out its business. A company must take various
different actions for preventing compliance violations and for detecting them.
Business processes have to be changed accordingly in order to adhere to these
requirements. Manual controls need to be installed in order to affect the work
which is done outside of IT systems. Technical controls are required for
assuring compliance within IT systems. In this paper, we present a compliance
management model that captures the compliance problem from a holistic point of
view. We elaborate on a technical control which is called compliance fragment
and we position it in the compliance management model. A compliance fragment is
a connected, possibly incomplete process graph that can be used as a reusable
building block for ensuring a consistent specification and integration of
compliance into a workflow. In particular, we propose language extensions to
BPEL for representing compliance fragments. Furthermore, we introduce a
methodology for integrating compliance fragments into given workflows.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2010-75&engl=0}
}
@inproceedings {INPROC-2010-52,
author = {David Schumm and Dimka Karastoyanova and Frank Leymann and Steve Strauch},
title = {{Fragmento: Advanced Process Fragment Library}},
booktitle = {Proceedings of the 19th International Conference on Information Systems Development (ISD'10), Prague, Czech Republic, August 25 - 27, 2010},
publisher = {Springer},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {659--670},
type = {Konferenz-Beitrag},
month = {August},
year = {2010},
isbn = {978-1-4419-9645-9},
keywords = {Process Fragment; Process Design; Reusability; Process Library},
language = {Englisch},
cr-category = {H.4.1 Office Automation,
D.3.3 Programming Language Constructs and Features},
contact = {David.Schumm@iaas.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Architektur von Anwendungssystemen},
abstract = {Reuse is a common discipline for decreasing software development time and for
improving overall quality, independent from the domain. As business processes
represent a fundamental asset of an organization, several concepts for enabling
reuse during process modeling have been proposed. However, only few concrete
examples for reusable process artifacts have been discussed so far. In this
paper, we present the concept of process fragments and an example collection of
process fragments for illustrating our reuse concept and for showing that it
can ac-tually be applied in practice for an easier and faster development of
process-based applications. The fragment examples demonstrate different
characteristics such fragments may exhibit. We also argue that this work will
encourage reuse of process logic in terms of fragments since it also provides
an opportunity to design and develop a process fragment library for collecting
process logic explicitly. As technical enabler for the approach we present a
prototype called Fragmento.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2010-52&engl=0}
}
@inproceedings {INPROC-2010-124,
author = {Aliaksandr Birukou and Agnieszka Betkowska Cavalcante and Fabio Casati and Soudip Roy Chowdhury and Vincenzo D'Andrea and Frank Leymann and Ernst Oberortner and Jacek Serafinski and Patricia Silveira and Steve Strauch and Marek Tluczek},
title = {{An Integrated Solution for Runtime Compliance Governance in SOA}},
booktitle = {Proceedings of the 8th International Conference on Service-Oriented Computing (ICSOC'10)},
editor = {Paul P Maglio and Mathias Weske and Jian Yang and Marcelo Fantinato},
publisher = {Springer},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
type = {Demonstration},
month = {Dezember},
year = {2010},
keywords = {compliance governance; DSL, monitoring, SOA, CEP},
language = {Englisch},
cr-category = {H.4.1 Office Automation},
contact = {steve.strauch@iaas.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Architektur von Anwendungssystemen},
abstract = {Compliance governance in organizations has been recently gaining importance
because of new regulations and the diversity of compliance sources. In this
demo we will show an integrated solution for runtime compliance governance in
Service-Oriented Architectures (SOAs). The proposed solution supports the whole
cycle of compliance management and has been tested in a real world case study.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2010-124&engl=0}
}
@inproceedings {INPROC-2010-03,
author = {David Schumm and Frank Leymann and Zhilei Ma and Thorsten Scheibler and Steve Strauch},
title = {{Integrating Compliance into Business Processes: Process Fragments as Reusable Compliance Controls}},
booktitle = {Proceedings of the Multikonferenz Wirtschaftsinformatik (MKWI'10), G{\"o}ttingen, Germany, February 23-25, 2010},
editor = {Schumann/Kolbe/Breitner/Frerichs},
address = {G{\"o}ttingen},
publisher = {Universit{\"a}tsverlag G{\"o}ttingen},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {2125--2137},
type = {Konferenz-Beitrag},
month = {Februar},
year = {2010},
isbn = {978-3-941875-31-9},
keywords = {Business Process Compliance, Process Fragment, Reusability},
language = {Englisch},
cr-category = {H.4.1 Office Automation},
contact = {David.Schumm@iaas.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Architektur von Anwendungssystemen},
abstract = {Companies increasingly have to pay attention to compliance concerns addressing
business processes. Flexibly reacting to changing requirements coming from
laws, regulations, and internal guidelines, becomes a necessary part of
business process management. In this paper we propose the application of the
emerging concept of process fragments in the field of compliance management in
process-based applications. We exemplify realizing compliance requirements
employing the notion of process fragments, and we show its characteristics and
its practical application using a scenario common in industry. In doing so, we
discuss how a fragment can be identified, which design considerations need to
be taken into account, we discuss efficient storage and retrieval, and which
ways of integration into business processes are feasible. This approach
leverages the reusability of both, process models and realizations of
compliance requirements.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2010-03&engl=0}
}
@inproceedings {INPROC-2009-76,
author = {Tobias Anstett and Dimka Karastoyanova and Frank Leymann and Ralph Mietzner and Ganna Monakova and Daniel Schleicher and Steve Strauch},
title = {{MC-Cube: Mastering Customizable Compliance in the Cloud}},
booktitle = {Proceedings of the 7th International Joint Conference on Service Oriented Computing, Stockholm, Sweden, November 23-27, 2009},
editor = {Springer},
publisher = {Springer Verlag},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {592--606},
type = {Konferenz-Beitrag},
month = {November},
year = {2009},
keywords = {Cloud Computing; IaaS; PaaS; SaaS; Monitoring; Enforcement},
language = {Englisch},
cr-category = {H.2.7 Database Administration},
contact = {anstett@iaas.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Architektur von Anwendungssystemen},
abstract = {Outsourcing parts of a company's processes becomes more and more important in a
globalized, distributed economy. While archi- tectural styles and technologies
such as service-oriented architecture and Web services facilitate the
distribution of business process over several departments, enterprises and
countries, these business processes still need to comply with various
regulations. These regulations can be company regulations, national, or
international regulations. When outsourcing IT-functions, enterprises must
ensure that the overall regulations are met. Therefore they need evidence from
their outsourcing partners that supports the proof of compliance to
regulations. Furthermore it must be possible to enforce the adherence to
compliance rules at partners. In this paper we introduce so-called compliance
interfaces that can be used by customers to subscribe to evidence at a provider
and to enforce regulations at a provider. We introduce a general compliance
architecture that allows compliance to be monitored and enforced at services
deployed in any emerging cloud delivery model.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2009-76&engl=0}
}
@inproceedings {INPROC-2009-41,
author = {Tobias Anstett and Frank Leymann and Ralph Mietzner and Steve Strauch},
title = {{Towards BPEL in the Cloud: Exploiting Different Delivery Models for the Execution of Business Processes}},
booktitle = {Proceedings of the International Workshop on Cloud Services (IWCS 2009) in conjunction with the 7th IEEE International Conference on Web Services (ICWS 2009), Los Angeles, CA, USA, July 10, 2009},
publisher = {IEEE},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {670--677},
type = {Workshop-Beitrag},
month = {Juli},
year = {2009},
keywords = {BPEL; Cloud Computing; SaaS; PaaS; IaaS; Security; Trust},
language = {Englisch},
cr-category = {H.4.1 Office Automation},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Architektur von Anwendungssystemen},
abstract = {More and more companies are outsourcing parts of their business processes to
third party providers to exploit the expertise and economies of scale of these
third party providers. In the IT field, emerging delivery models for software
such as Software as a Service and cloud computing offer the possibility to
outsource applications and computing infrastructure and thus enable enterprises
to focus on their core competences. In this paper we investigate how the new
delivery models affect the outsourcing of business processes modeled in
WS-BPEL. WS-BPEL is the standard to model and execute business processes in Web
service-based IT landscapes. We describe how security and trust issues affect
the execution of BPEL processes in the cloud and show the requirements on the
middleware supporting the execution of BPEL processes.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2009-41&engl=0}
}
@inproceedings {INPROC-2009-30,
author = {Florian Daniel and Fabio Casati and Vincenzo D'Andrea and Steve Strauch and David Schumm and Frank Leymann and Emmanuel Mulo and Uwe Zdun and Schahram Dustdar and Samir Sebahi and Fabien de Marchi and Mohand-Said Hacid},
title = {{Business Compliance Governance in Service-Oriented Architectures}},
booktitle = {Proceedings of the IEEE Twenty-Third International Conference on Advanced Information Networking and Applications (AINA'09), Bradford, United Kingdom, May 26-29, 2009},
editor = {Irfan Awan and Muhammad Younas and Takahiro Hara and Arjan Durresi},
address = {Los Alamitos, California},
publisher = {IEEE Press},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
pages = {113--120},
type = {Konferenz-Beitrag},
month = {Mai},
year = {2009},
isbn = {978-1-4244-4000-9},
keywords = {Compliance, Process Fragments, SOA, Compliance governance, Business process management, View-based modeling},
language = {Englisch},
cr-category = {H.4.1 Office Automation},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Architektur von Anwendungssystemen},
abstract = {Governing business compliance with regulations, laws, best practices,
contracts, and the like is not an easy task, and so far there are only limited
software products available that help a company to express compliance rules and
to analyze its compliance state. We argue that today’s SOA-based way of
implementing and conducting business (e.g., using Web services and business
process engines) lends itself very well to the development of a comprehensive
compliance government solution that effectively aids companies in being
compliant. In this paper, we contextualize the compliance problem in SOA-based
businesses, we highlight which are the most salient research challenges that
need to be addressed, and we describe our approach to compliance governance,
spanning design, execution, and evaluation concerns.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2009-30&engl=0}
}
@inproceedings {INPROC-2009-23,
author = {Branimir Wetzstein and Steve Strauch and Frank Leymann},
title = {{Measuring Performance Metrics of WS-BPEL Service Compositions}},
booktitle = {Proceedings of the Fifth International Conference on Networking and Services (ICNS 2009), Valencia, Spain, April 20-25, 2009},
publisher = {IEEE Computer Society},
institution = {Universit{\"a}t Stuttgart, Fakult{\"a}t Informatik, Elektrotechnik und Informationstechnik, Germany},
type = {Konferenz-Beitrag},
month = {April},
year = {2009},
keywords = {KPI, Performance Measurement, Process Performace Metric, WS-BPEL, Service Composition},
language = {Englisch},
cr-category = {H.4.1 Office Automation},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Architektur von Anwendungssystemen},
abstract = {In this paper we present an approach to the development of monitoring solutions
for processes implemented as WSBPEL service compositions. The approach allows
modeling of process performance metrics in a platform-independent manner and
then generating an event-based monitor model for a specific WS-BPEL process
engine. We create a metamodel which enables modeling of different types of
process performance metrics. In particular, our approach supports modeling of
metrics related to correlated processes. In the deployment phase, we generate a
monitor model based on a proprietary event metamodel of a process engine. In
addition, we determine which events are needed for the calculation of PPMs, and
generate corresponding deployment information for the process engine.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2009-23&engl=0}
}
@article {ART-2016-09,
author = {Johannes Wettinger and Vasilios Andrikopoulos and Frank Leymann and Steve Strauch},
title = {{Middleware-oriented Deployment Automation for Cloud Applications}},
journal = {IEEE Transactions on Cloud Computing},
publisher = {IEEE},
type = {Artikel in Zeitschrift},
month = {Februar},
year = {2016},
issn = {2168-7161},
doi = {10.1109/TCC.2016.2535325},
language = {Englisch},
cr-category = {D.2.11 Software Engineering Software Architectures,
C.2.4 Distributed Systems},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Architektur von Anwendungssystemen},
abstract = {Fully automated provisioning and deployment of applications is one of the most
essential prerequisites to make use of the benefits of Cloud computing in order
to reduce the costs for managing applications. A huge variety of approaches,
tools, and providers are available to automate the involved processes. The
DevOps community, for instance, provides tooling and reusable artifacts to
implement deployment automation in an application-oriented manner.
Platform-as-a-Service frameworks are available for the same purpose. In this
work we systematically classify and characterize available deployment
approaches independently from the underlying technology used. For motivation
and evaluation purposes, we choose Web applications with different technology
stacks and analyze their specific deployment requirements. Afterwards, we
provision these applications using each of the identified types of deployment
approaches in the Cloud to perform qualitative and quantitative measurements.
Finally, we discuss the evaluation results and derive recommendations to decide
which deployment approach to use based on the deployment requirements of an
application. Our results show that deployment approaches can also be
efficiently combined if there is no 'best fit' for a particular application.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2016-09&engl=0}
}
@article {ART-2014-12,
author = {Santiago G{\'o}mez S{\'a}ez and Vasilios Andrikopoulos and Frank Leymann and Steve Strauch},
title = {{Design Support for Performance Aware Dynamic Application (Re-)Distribution in the Cloud}},
journal = {IEEE Transactions on Services Computing},
publisher = {IEEE Computer Society},
volume = {8},
number = {2},
pages = {225--239},
type = {Artikel in Zeitschrift},
month = {Dezember},
year = {2014},
doi = {10.1109/TSC.2014.2381237},
language = {Englisch},
cr-category = {D.2.11 Software Engineering Software Architectures,
C.2.4 Distributed Systems,
D.2.8 Software Engineering Metrics},
contact = {Santiago G{\'o}mez S{\'a}ez: gomez-saez@iaas.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Architektur von Anwendungssystemen},
abstract = {The wide adoption of the Cloud computing paradigm by many different domains has
increased both the number and type of available offerings as a service, e.g.
Database-as-a-service (DBaaS) or Platform-as-a-Service (PaaS), and with them
the possibilities in deploying and operating an application partially or
completely in the Cloud. The need for providing design support to application
developers in this environment is the focus of this work. Toward this goal, in
the following we first scope the discussion on the persistence layer of
applications and we investigate the effect of different deployment scenarios on
the performance of the application over time. Based on the results of this
analyses we then propose an application (re-)distribution design support
process, which we evaluate empirically by means of a well-known application.
The results of this evaluation both highlight the strengths of our proposal,
and at the same time, provide a clear path for the following steps in our work.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2014-12&engl=0}
}
@article {ART-2014-11,
author = {Steve Strauch and Vasilios Andrikopoulos and Dimka Karastoyanova and Frank Leymann and Nikolay Nachev and Albrecht Staebler},
title = {{Migrating Enterprise Applications to the Cloud: Methodology and Evaluation}},
journal = {International Journal of Big Data Intelligence},
publisher = {Perpetual Innovation Media Pvt. Ltd.},
volume = {1},
number = {3},
pages = {127--140},
type = {Artikel in Zeitschrift},
month = {Dezember},
year = {2014},
keywords = {Data Migration; Decision Support; Database layer; Application Refactoring},
language = {Englisch},
cr-category = {C.2.4 Distributed Systems,
C.4 Performance of Systems,
D.2.8 Software Engineering Metrics,
D.2.11 Software Engineering Software Architectures,
H.2.1 Database Management Logical Design,
H.2.4 Database Management Systems,
H.3.4 Information Storage and Retrieval Systems and Software,
H.4.2 Information Systems Applications Types of Systems},
contact = {a href=``http://www.iaas.uni-stuttgart.de/institut/mitarbeiter/strauch''Steve Strauch/ a},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Architektur von Anwendungssystemen},
abstract = {Migrating existing on-premise applications to the cloud is a complex and
multi-dimensional task and may require adapting the applications themselves
significantly. For example, when considering the migration of the database
layer of an application, which provides data persistence and manipulation
capabilities, it is necessary to address aspects like differences in the
granularity of interactions and data confidentiality, and to enable the
interaction of the application with remote data sources. In this work, we
present a methodology for application migration to the cloud that takes these
aspects into account. In addition, we also introduce a tool for decision
support, application refactoring and data migration that assists application
developers in realising this methodology. We evaluate the proposed methodology
and enabling tool using a case study in collaboration with an IT enterprise.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2014-11&engl=0}
}
@article {ART-2013-10,
author = {Steve Strauch and Vasilios Andrikopoulos and Santiago G{\'o}mez S{\'a}ez and Frank Leymann},
title = {{ESB^MT: A Multi-tenant Aware Enterprise Service Bus}},
journal = {International Journal of Next-Generation Computing},
publisher = {Perpetual Innovation Media Pvt. Ltd.},
volume = {4},
number = {3},
pages = {230--249},
type = {Artikel in Zeitschrift},
month = {November},
year = {2013},
issn = {0976-5034},
keywords = {Enterprise Service Bus; Multi-tenancy; Cloud-enabled middleware},
language = {Englisch},
cr-category = {C.2.4 Distributed Systems},
contact = {a href=``http://www.iaas.uni-stuttgart.de/institut/mitarbeiter/strauch''Steve Strauch/ a},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Architektur von Anwendungssystemen},
abstract = {Multi-tenancy, the sharing of the whole technological stack by different
consumers at the same time, allows service providers to maximize resource
utilization and reduce servicing costs per customer. Essential components of
the contemporary enterprise environment like the Enterprise Service Bus (ESB)
are therefore required to raise to the challenge of supporting and enabling
multi-tenancy, becoming multi-tenant aware. Towards this goal, in this work we
discuss the requirements for multi-tenant ESB solutions as fundamental building
blocks in the Platform as a Service (PaaS) Cloud delivery model. Addressing
these requirements, we propose a solution for dealing with multiple tenant
contexts on the level of middleware, based on which we develop ESB^MT, an
implementation agnostic multi-tenant aware ESB architecture that we instantiate
based on the Apache ServiceMix ESB open source solution. Evaluating the
performance of our proposal required the extension of an ESB benchmark, the
results of which for different deployment options we also present in this work.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2013-10&engl=0}
}
@article {ART-2013-08,
author = {Vasilios Andrikopoulos and Tobias Binz and Frank Leymann and Steve Strauch},
title = {{How to adapt applications for the Cloud environment}},
journal = {Computing},
publisher = {Springer},
volume = {95},
number = {6},
pages = {493--535},
type = {Artikel in Zeitschrift},
month = {Juni},
year = {2013},
doi = {10.1007/s00607-012-0248-2},
keywords = {Cloud migration; application adaptation; Cloud-enabled applications; data layer; business layer; migration types},
language = {Englisch},
cr-category = {D.2.0 Software Engineering General,
D.2.11 Software Engineering Software Architectures,
D.2.12 Software Engineering Interoperability,
H.2.m Database Management Miscellaneous},
contact = {vasilios.andrikopoulos@iaas.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Architektur von Anwendungssystemen},
abstract = {The migration of existing applications to the Cloud requires adapting them to a
new computing paradigm. Existing works have focused on migrating the whole
application stack by means of virtualization and deployment on the Cloud,
delegating the required adaptation effort to the level of resource management.
With the proliferation of Cloud services allowing for more flexibility and
better control over the application migration, the migration of individual
application layers, or even individual architectural components to the Cloud,
becomes possible. Towards this goal, in this work we focus on the challenges
and solutions for each layer when migrating different parts of the application
to the Cloud. We categorize different migration types and identify the
potential impact and adaptation needs for each of these types on the
application layers based on an exhaustive survey of the State of the Art. We
also investigate various cross-cutting concerns that need to be considered for
the migration of the application, and position them with respect to the
identified migration types. Finally, we present some of the open research
issues in the field and position our future work targeting these research
questions.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2013-08&engl=0}
}
@article {ART-2012-13,
author = {Sergio Garc{\'\i}a-G{\'o}mez and Miguel Jim{\'e}nez-Ga{\~n}{\'a}n and Yehia Taher and Christof Momm and Frederic Junker and J{\'o}zsef B{\'\i}r{\'o} and Andreas Menychtas and Vasilios Andrikopoulos and Steve Strauch},
title = {{Challenges for the Comprehensive Management of Cloud Services in a PaaS Framework}},
journal = {Scalable Computing: Practice and Experience (SCPE)},
publisher = {West University of Timisoara},
volume = {13},
number = {3},
pages = {201--213},
type = {Artikel in Zeitschrift},
month = {November},
year = {2012},
issn = {1895-1767},
keywords = {cloud; platform as a service; service composition},
language = {Englisch},
cr-category = {C.2.4 Distributed Systems,
D.2.11 Software Engineering Software Architectures},
ee = {http://www.scpe.org/index.php/scpe/article/view/793/0},
contact = {a href=``http://www.iaas.uni-stuttgart.de/institut/mitarbeiter/strauch''Steve Strauch/ a},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Architektur von Anwendungssystemen},
abstract = {Cloud services allow for hosting applications partially or completely in the
Cloud by migrating their components and data. Especially with respect to data
migration, a series of functional and non-functional challenges like data
confidentiality arise when considering private and public Cloud data stores. In
this paper we identify some of these challenges and propose a set of reusable
solutions focusing on the non-functional aspects, organized together as a set
of Cloud Data Patterns.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2012-13&engl=0}
}
@article {ART-2011-18,
author = {Oliver Kopp and Katharina G{\"o}rlach and Dimka Karastoyanova and Frank Leymann and Michael Reiter and David Schumm and Mirko Sonntag and Steve Strauch and Tobias Unger and Matthias Wieland and Rania Khalaf},
title = {{A Classification of BPEL Extensions}},
journal = {Journal of Systems Integration},
publisher = {Online},
volume = {2},
number = {4},
pages = {2--28},
type = {Artikel in Zeitschrift},
month = {November},
year = {2011},
issn = {1804-2724},
keywords = {BPEL Extension; Classification of Extensions; Extension Guidelines},
language = {Englisch},
cr-category = {H.4.1 Office Automation},
ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/ART-2011-18/ART-2011-18.pdf,
http://www.si-journal.org/index.php/JSI/article/view/103},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Architektur von Anwendungssystemen},
abstract = {The Business Process Execution Language (BPEL) has emerged as de-facto standard
for business processes implementation. This language is designed to be
extensible for including additional valuable features in a standardized manner.
There are a number of BPEL extensions available. They are, however, neither
classified nor evaluated with respect to their compliance to the BPEL standard.
This article fills this gap by providing a framework for classifying BPEL
extensions, a classification of existing extensions, and a guideline for
designing BPEL extensions.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2011-18&engl=0}
}
@article {ART-2011-02,
author = {David Schumm and Dimka Karastoyanova and Oliver Kopp and Frank Leymann and Mirko Sonntag and Steve Strauch},
title = {{Process Fragment Libraries for Easier and Faster Development of Process-based Applications}},
journal = {Journal of Systems Integration},
publisher = {Online},
volume = {2},
number = {1},
pages = {39--55},
type = {Artikel in Zeitschrift},
month = {Januar},
year = {2011},
issn = {1804-2724},
keywords = {Process Fragment; Process Design; Reusability; Process Library.},
language = {Englisch},
cr-category = {H.4.1 Office Automation},
ee = {http://www.si-journal.org/,
http://www.si-journal.org/index.php/JSI/article/view/83},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Architektur von Anwendungssystemen},
abstract = {The term “process fragment” is recently gaining momentum in business process
management research. We understand a process fragment as a connected and
reusable process structure, which has relaxed completeness and consistency
criteria compared to executable processes. We claim that process fragments
allow for an easier and faster development of process-based applications. As
evidence to this claim we present a process fragment concept and show a sample
collection of concrete, real-world process fragments. We present advanced
application scenarios for using such fragments in development of process-based
applications. Process fragments are typically managed in a repository, forming
a process fragment library. On top of a process fragment library from previous
work, we discuss the potential impact of using process fragment libraries in
cross-enterprise collaboration and application integration.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2011-02&engl=0}
}
@inbook {INBOOK-2015-01,
author = {Steve Strauch and Vasilios Andrikopoulos and Dimka Karastoyanova and Karolina Vukojevic-Haupt},
title = {{Migrating eScience Applications to the Cloud: Methodology and Evaluation}},
series = {Cloud Computing with E-science Applications},
publisher = {CRC Press/Taylor \& Francis},
type = {Beitrag in Buch},
month = {Juli},
year = {2015},
keywords = {Data Migration; Decision Support; Database layer; Application Refactoring},
language = {Englisch},
cr-category = {D.2.11 Software Engineering Software Architectures,
H.3.4 Information Storage and Retrieval Systems and Software},
contact = {steve.strauch@iaas.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Architektur von Anwendungssystemen},
abstract = {eScience is an active field of research striving to enable faster scientific
discovery and ground-breaking research in different scientific domains by means
of information technology. In recent years Cloud computing has gained
significant acceptance in both the enterprise application management and
scientific computing for its promise to reduce infrastructure costs and provide
virtually unlimited computational power and data storage - requirements of
particular importance for businesses, and of even greater importance to
scientists and research organizations. While research in this field is very
active in providing novel concepts, techniques and principles towards building
Cloud-native applications, there is a significant effort to Cloud-enable
existing applications in order to reuse existing systems and therefore
investments. Typically, Cloud-enabling applications is related to the migration
of whole systems or parts of them on a public or private Cloud environment.
In this work we present a vendor- and technology-independent methodology for
migrating the database layer of applications, and refactoring the application
architecture. The methodology is applicable to applications in different
application domains and is agnostic to the types of data sources. It fulfils
requirements also presented in this work, which we have identified in
collaboration with software engineers and domain experts in several research
projects. We use this methodology to migrate the database layer of a scientific
workflow management system (SimTech SWfMS), which we developed in the scope of
our research activities in the SimTech project. The migration of the SimTech
SWfMS has been done using the Cloud Data Migration Support Tool - a proof of
concept implementation of the methodology. Both the introduced methodology and
the supporting tool have been evaluated and our findings are presented.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INBOOK-2015-01&engl=0}
}
@inbook {INBOOK-2013-03,
author = {Vasilios Andrikopoulos and Steve Strauch and Christoph Fehling and Frank Leymann},
title = {{CAP-Oriented Design for Cloud-Native Applications}},
series = {Cloud Computing and Services Science},
publisher = {Springer International Publishing},
series = {Communications in Computer and Information Science},
volume = {367},
pages = {215--229},
type = {Beitrag in Buch},
month = {Dezember},
year = {2013},
doi = {10.1007/978-3-319-04519-1_14},
keywords = {CAP Theorem; Cloud Patterns; Cloud-native Applications Design},
language = {Englisch},
cr-category = {C.2.4 Distributed Systems,
D.2.11 Software Engineering Software Architectures,
H.3.4 Information Storage and Retrieval Systems and Software},
ee = {http://link.springer.com/chapter/10.1007/978-3-319-04519-1_14},
contact = {vasilios.andrikopoulos@iaas.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Architektur von Anwendungssystemen},
abstract = {Brewer's conjecture, and its resulting formalization as the CAP theorem, impose
serious limitations on the consistency, availability and network partitioning
tolerance characteristics of distributed systems. Despite its importance
however, few works explicitly consider the implications of the CAP theorem in
the design of applications, especially for applications that are designed
natively for the Cloud. In order to address this need, in this work we propose
a CAP-oriented design methodology for Cloud-native applications. For this
purpose we build and extend our previous work on Cloud architectural patterns.
Finally, we show how the methodology can be used in practice to design an
application solution with desired CAP properties.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INBOOK-2013-03&engl=0}
}