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Auflistung nach Autor:in "Martin, Daniel"

1 - 3 von 3
  • Konferenzbeitrag
    Demonstrating near real-time analytics with IBM DB2 analytics accelerator
    (Datenbanksysteme für Business, Technologie und Web (BTW) 2042, 2013) Martin, Daniel; Ivanova, Iliyana; Mueller, Raphael; Velez Montoya, Luis Eduardo; Maruschka, Klaus
    Version 3 of the IBM1 DB2 Analytics Accelerator (IDAA) takes a major step towards the vision of a universal relational DBMS that transparently processes both, OLTP and analytical-type queries in a single system. Based on heuristics in DB2 for z/OS, the DB2 optimizer decides if a query should be executed by ”mainline” DB2 or if it is beneficial to forward it to the attached IBM DB2 Analytics Optimizer that operates on copies of the DB2 tables. The new ”incremental update” functionality keeps these copy tables in sync by employing replication technology that monitors the DB2 transaction log and asynchronously applies the changes in micro-batches to IDAA. This enables near real-time analytics over online data, effectively marrying traditionally separated OLTP and data warehouse environments. With IDAA, reports can access data that is constantly refreshed in contrast to traditional warehouses that are updated on a daily or even weekly basis. Without any changes to the applications and without the need to introduce cross-system ETL flows, an existing OLTP environment can be used for reporting purposes as well. In this demo, we present a near realtime reporting application modeled on an industry benchmark (TPC-DS), but with a constantly changing set of tables with over 800 million rows that is running on DB2 for z/OS. In a browser-based user interface, demo attendants can influence the rate of changes to the tables and observe how the reporting queries are capturing new data as it is being modified by a separately running OLTP workload generator.
  • Zeitschriftenartikel
    The Difference Between Graph-Based and Block-Structured Business Process Modelling Languages
    (Enterprise Modelling and Information Systems Architectures - An International Journal: Vol. 4, Nr. 1, 2009) Kopp, Oliver; Martin, Daniel; Wutke, Daniel; Leyman, Frank
    The most prominent business process notations in use today are BPMN, EPC and BPEL. While all those languages show similarities on the conceptual level and share similar constructs, the semantics of these constructs and even the intended use of the language itself are often quite different. As a result, users are uncertain when to use which language or construct in a particular language, especially when they have used another business process notation before. In this paper, we discuss the core characteristics of graph-based and block-structured modelling languages and compare them with respect to their join and loop semantics.
  • Konferenzbeitrag
    On the choice between graph-based and block-structured business process modeling languages
    (Modellierung betrieblicher Informationssysteme (MobIS 2008), 2008) Kopp, Oliver; Martin, Daniel; Wutke, Daniel; Leymann, Frank
    The most prominent business process notations in use today are BPMN, EPC and BPEL. While all those languages show similarities on the conceptual level and share similar constructs, the semantics of these constructs and even the intended use of the language itself are often quite different. As a result, users are uncertain when to use which language or construct in a particular language, especially when they have used another business process notation before. In this paper, we discuss the core characteristics of graph-based and block-structured modeling languages and compare them with respect to their join and loop semantics.