Along with the progress of the cloud computing, it became necessary to deal with various and large quantity data in the distributed database environments. So, the various NoSQL databases have been proposed and put to practical use. However, as for the NoSQL databases, since it supports the distributed environment, the integrity of the database update is basically guaranteed only by the object u...

Object-relational mappers such as Hibernate are often used in applications to persist business objects in relational databases. The availability of commercial cloud-based database services opens new opportunities for developing and deploying database applications. In addition, highly scalable cloud services belong to the class of NoSQL systems promising to avoid the paradigm mismatch between th...

Process-Aware Information Systems (PAIS) is an IT system that support business processes and generate large amounts of event logs from the execution of business processes. An event log is represented as a tuple of CaseID, Timestamp, Activity and Actor. Process Mining is a new and emerging field that aims at analyzing the event logs to discover, enhance and improve business processes and check c...

Nowadays, data warehousing and online analytical processing (OLAP) are core technologies in business intelligence and therefore have drawn much interest by researchers in the last decade. However, these technologies have been mainly developed for relational database systems in centralized environments. In other words, these technologies have not been designed to be applied in scalable systems s...

The computing community is facing several big data challenges due to the unprecedented growth in the volume and variety of data. Many large-scale Internet companies use distributed NoSQL data stores to mitigate these challenges. These NoSQL data-store installations require massive computing infrastructure, which consume significant amount of energy and contribute to operational costs. This cost...

While Model Driven Engineering is gaining more industrial interest, scalability issues when managing large models have become a major problem in current modeling frameworks. Scalable model persistence has been achieved by using NoSQL backends for model storage, but existing modeling framework APIs have not evolved accordingly, limiting NoSQL query performance benefits. In this paper we present ...

Системы баз данных, принадлежащие к классу NoSQL, используются для обеспечения горизонтального масштабирования данных и работы со сверхбольшими объёмами данных. При решении задач над множественными неоднородными информационными ресурсами необходимо их использовать. В статье рассмотрены подходы к отображению моделей NoSQL разных видов в объектную модель языка СИНТЕЗ, используемого в качестве уни...

NoSQL data stores are popular backends for managing big data that is evolving over time: Due to their schema-flexibility, a new release of the application does not require a full migration of data already persisted in production. Instead, using object-NoSQL mappers, developers can specify lazy data migrations that are executed on-the-fly, when a legacy entity is loaded into the application. Thi...

Not Only SQL (NoSQL) is a critical technology that scalable and provides flexible schemas, thereby complementing existing relational database technologies. Although NoSQL flourishing, present solutions lack the features required by enterprises for missions. In this paper, we explore to data recovery issue in NoSQL. Data any table entails restoring prior state or replaying (insert/update) operat...