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    <id>1017</id>
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    <pageNumber/>
    <edition/>
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    <type>masterthesis</type>
    <publisherName/>
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    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2007-10-10</completedDate>
    <publishedDate>2007-10-10</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="deu">Transaktionen für verteilte Wikis auf strukturierten Overlay  Netzwerken</title>
    <title language="eng">Transactions for Distributed Wikis on Structured Overlay Networks</title>
    <abstract language="deu">Die Diplomarbeit präsentiert ein Transaktionsverfahren für strukturierte Overlay-Netzwerke, das an die Erfordernisse verteilter Informationssysteme mit relationalem Datenmodell angepasst ist. Insbesondere wird der Einsatz von Transaktionen für verteilte Wikis betrachtet, die moderne Funktionalitäten, wie Metadaten und zusätzliche Indexe für die Navigation, unterstützen. Konsistenz und Dauerhaftigkeit der gespeicherten Daten erfordert die Behandlung von Knotenausfällen. Die Arbeit schlägt dafür das Zellenmodell vor: Das Overlay wird aus replizierten Zustandsmaschinen gebildet, um Verfügbarkeit zu gewährleisten. Das Transaktionsverfahren baut darauf auf und verwendet Two-Phase-Commit mit Fehlererkennung und Widerherstellung von ausgefallenen Transaktionsmanagern. Anwendungen wird eine Auswahl an pessimistischen und hybrid-optimistischen Nebenläufigkeitskontrollverfahren geboten, die die Minimierung von Latenzeffekten und die schnelle Ausführung von Nur-Lese-Transaktionen ermöglichen. Für die Beispielanwendung Wiki wird der erforderliche Pseudocode angegeben und die verschiedenen Nebenläufigkeitskontrollverfahren hinsichtlich ihrer Nachrichtenkomplexität verglichen.</abstract>
    <abstract language="eng">The diploma thesis presents a transaction processing scheme for structured overlay networks and uses it to develop a distributed Wiki application based on a relational data model. The Wiki supports rich metadata and additional indexes for navigation purposes. Ensuring consistency and durability requires handling of node failures. Such failures are masked by providing high availability of nodes. This in turn is achieved by constructing the overlay from replicated state machines (cell model). Atomicity is realized using two phase commit with additional support for failure detection and restoration of the transaction manager. The developed transaction processing scheme provides the application with a mixture of pessimistic, hybrid optimistic and multiversioning concurrency control techniques to minimize the impact of replication on latency and optimize for read operations. The pseudocode of the relevant Wiki functions is presented and the different concurrency control techniques are evaluated in terms of message complexity.</abstract>
    <identifier type="opus3-id">1033</identifier>
    <identifier type="urn">urn:nbn:de:0297-zib-10176</identifier>
    <author>Stefan Plantikow</author>
    <submitter>unknown unknown</submitter>
    <advisor>Alexander Reinefeld</advisor>
    <advisor>Miroslaw Malek</advisor>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Verteilte Transaktionen</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Content Management Systeme</value>
    </subject>
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      <language>deu</language>
      <type>uncontrolled</type>
      <value>Strukturierte Overlay-Netzwerke</value>
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    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Konsistenz</value>
    </subject>
    <subject>
      <language>deu</language>
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      <value>Nebenläufigkeitskontrolle</value>
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      <language>eng</language>
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      <value>distributed transactions</value>
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      <language>eng</language>
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      <value>content management systems</value>
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      <language>eng</language>
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      <value>structured overlay networks</value>
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      <language>eng</language>
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      <value>consistency</value>
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      <language>eng</language>
      <type>uncontrolled</type>
      <value>concurrency control</value>
    </subject>
    <collection role="ddc" number="004">Datenverarbeitung; Informatik</collection>
    <collection role="ccs" number="E.1">DATA STRUCTURES</collection>
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    <collection role="projects" number="2008-Scalaris">2008-Scalaris</collection>
    <thesisPublisher>Zuse Institute Berlin (ZIB)</thesisPublisher>
    <thesisGrantor>Humboldt-Universität zu Berlin</thesisGrantor>
    <file>https://opus4.kobv.de/opus4-zib/files/1017/Diplomarbeit.pdf</file>
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    <pageFirst>14</pageFirst>
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    <volume>6637</volume>
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    <publisherName>Springer Berlin / Heidelberg</publisherName>
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    <title language="eng">Latency-Optimal Walks in Replicated and Partitioned Graphs</title>
    <parentTitle language="eng">Database Systems for Adanced Applications</parentTitle>
    <identifier type="doi">10.1007/978-3-642-20244-5_3</identifier>
    <identifier type="url">http://dx.doi.org/10.1007/978-3-642-20244-5{\_}3</identifier>
    <enrichment key="Series">Lecture Notes in Computer Science</enrichment>
    <enrichment key="PeerReviewed">yes</enrichment>
    <author>Stefan Plantikow</author>
    <editor>Jianliang Xu</editor>
    <author>Maik Jorra</author>
    <editor>Ge Yu</editor>
    <editor>Shuigeng Zhou</editor>
    <editor>Rainer Unland</editor>
    <collection role="institutes" number="vas">Distributed Algorithms and Supercomputing</collection>
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    <title language="eng">Towards Explicit Data Placement in Scalable Key/Value Stores</title>
    <parentTitle language="eng">Architectures and Languages for Self-Managing Distributed Systems (SelfMan@SASO)</parentTitle>
    <enrichment key="PeerReviewed">yes</enrichment>
    <author>Mikael Högqvist</author>
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    <collection role="projects" number="2008-Scalaris">2008-Scalaris</collection>
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    <title language="eng">A Transactional Scalable Distributed Data Store</title>
    <parentTitle language="eng">1st IEEE International Scalable Computing Challenge, co-located with CCGrid’08</parentTitle>
    <author>Thorsten Schütt</author>
    <author>Monika Moser</author>
    <author>Stefan Plantikow</author>
    <author>Florian Schintke</author>
    <author>Alexander Reinefeld</author>
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    <collection role="persons" number="reinefeld">Reinefeld, Alexander</collection>
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    <publisherPlace>Znojmo, Czech Republic</publisherPlace>
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    <title language="eng">Continous Queries over Federated Social Networks</title>
    <parentTitle language="eng">Fourth Doctoral Workshop on Mathematical and Engineering Methods in Computer Science (MEMICS 2008)</parentTitle>
    <author>Stefan Plantikow</author>
    <author>Mikael Högqvist</author>
    <collection role="institutes" number="vas">Distributed Algorithms and Supercomputing</collection>
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    <id>3453</id>
    <completedYear>2009</completedYear>
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    <language>eng</language>
    <pageFirst>281</pageFirst>
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    <issue>3</issue>
    <volume>25</volume>
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    <title language="eng">Generalizing the Data Management of Three Community Grids</title>
    <parentTitle language="eng">Future Generation Computer Systems (FGCS)</parentTitle>
    <identifier type="doi">10.1016/j.future.2008.05.001</identifier>
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    <author>Stefan Plantikow</author>
    <author>Kathrin Peter</author>
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    <author>Alexander Papaspyrou</author>
    <collection role="institutes" number="vas">Distributed Algorithms and Supercomputing</collection>
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    <id>3489</id>
    <completedYear>2008</completedYear>
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    <language>eng</language>
    <pageFirst>337</pageFirst>
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    <title language="eng">Transactions and Concurrency Control for Peer-to-Peer-Wikis: An Evaluation</title>
    <parentTitle language="eng">Making Grids Work</parentTitle>
    <identifier type="doi">10.1007/978-0-387-78448-9_27</identifier>
    <author>Stefan Plantikow</author>
    <editor>Marco Danelutto</editor>
    <author>Alexander Reinefeld</author>
    <editor>Paraskevi Fragopoulou</editor>
    <author>Florian Schintke</author>
    <editor>Vladimir Getov</editor>
    <collection role="institutes" number="vas">Distributed Algorithms and Supercomputing</collection>
    <collection role="persons" number="reinefeld">Reinefeld, Alexander</collection>
    <collection role="persons" number="schintke">Schintke, Florian</collection>
    <collection role="projects" number="2008-Scalaris">2008-Scalaris</collection>
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    <id>3503</id>
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    <title language="eng">Distributed Wikis on Structured Overlays</title>
    <parentTitle language="eng">CoreGrid Workshop on Grid Programming Models, Grid and P2P System Architecture, Grid Systems, Tools and Environments</parentTitle>
    <author>Stefan Plantikow</author>
    <author>Alexander Reinefeld</author>
    <author>Florian Schintke</author>
    <collection role="institutes" number="vas">Distributed Algorithms and Supercomputing</collection>
    <collection role="persons" number="reinefeld">Reinefeld, Alexander</collection>
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    <id>3513</id>
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    <language>eng</language>
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    <volume>4785</volume>
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    <publisherName>Springer</publisherName>
    <publisherPlace>Silicon Valley, CA, USA</publisherPlace>
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    <completedDate>--</completedDate>
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    <title language="eng">Transactions for Distributed Wikis on Structured Overlays</title>
    <parentTitle language="eng">DSOM</parentTitle>
    <identifier type="doi">10.1007/978-3-540-75694-1_25</identifier>
    <enrichment key="Series">LNCS</enrichment>
    <author>Stefan Plantikow</author>
    <editor>Alexander Clemm</editor>
    <author>Alexander Reinefeld</author>
    <editor>Lisandro Granville</editor>
    <author>Florian Schintke</author>
    <editor>Rolf Stadler</editor>
    <collection role="institutes" number="vas">Distributed Algorithms and Supercomputing</collection>
    <collection role="persons" number="reinefeld">Reinefeld, Alexander</collection>
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    <title language="eng">Predicting Resource Demand in Dynamic Utility Computing Environments</title>
    <parentTitle language="eng">2006 International Conference on Autonomic and Autonomous Systems (ICAS 2006), 16-21 July 2006, Silicon Valley, California, USA</parentTitle>
    <identifier type="doi">10.1109/ICAS.2006.44</identifier>
    <author>Artur Andrzejak</author>
    <author>Sven Graupner</author>
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    <collection role="institutes" number="vas">Distributed Algorithms and Supercomputing</collection>
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    <title language="eng">Defining Fuzzy Logic Controllers with Scarce Model Data</title>
    <parentTitle language="eng">First International Workshop on Feedback Control Implementation and Design in Computing Systems and Networks FeBID’06 (colocated with NOMS’06)</parentTitle>
    <author>Artur Andrzejak</author>
    <author>Stefan Plantikow</author>
    <collection role="institutes" number="vas">Distributed Algorithms and Supercomputing</collection>
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  <doc>
    <id>1046</id>
    <completedYear/>
    <publishedYear/>
    <thesisYearAccepted/>
    <language>deu</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
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    <completedDate>2007-12-12</completedDate>
    <publishedDate>2007-12-12</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="deu">Transaktionen für verteilte Wikis auf strukturierten Overlay-Netzwerken</title>
    <title language="eng">Transactions for Distributed Wikis on Structured Overlay Networks</title>
    <abstract language="deu">Die Arbeit präsentiert ein Transaktionsverfahren für strukturierte Overlay-Netzwerke, das an die Erfordernisse verteilter Informationssysteme mit relationalem Datenmodell angepasst ist. Insbesondere wird der Einsatz von Transaktionen für verteilte Wikis betrachtet, die moderne Funktionalitäten, wie Metadaten und zusätzliche Indexe für die Navigation, unterstützen. Konsistenz und Dauerhaftigkeit der gespeicherten Daten erfordert die Behandlung von Knotenausfällen. Die Arbeit schlägt dafür das Zellenmodell vor: Das Overlay wird aus replizierten Zustandsmaschinen gebildet, um Verfügbarkeit zu gewährleisten. Das Transaktionsverfahren baut darauf auf und verwendet Two-Phase-Commit mit Fehlererkennung und Widerherstellung von ausgefallenen Transaktionsmanagern. Anwendungen wird eine Auswahl an pessimistischen und hybrid-optimistischen Nebenläufigkeitskontrollverfahren geboten, die die Minimierung von Latenzeffekten und die schnelle Ausführung von Nur-Lese-Transaktionen ermöglichen. Für die Beispielanwendung Wiki wird der erforderliche Pseudocode angegeben und die verschiedenen Nebenläufigkeitskontrollverfahren hinsichtlich ihrer Nachrichtenkomplexität verglichen.</abstract>
    <abstract language="eng">The report presents a transaction processing scheme for structured overlay networks and uses it to develop a distributed Wiki application based on a relational data model. The Wiki supports rich metadata and additional indexes for navigation purposes. Ensuring consistency and durability requires handling of node failures. Such failures are masked by providing high availability of nodes. This in turn is achieved by constructing the overlay from replicated state machines (cell model). Atomicity is realized using two phase commit with additional support for failure detection and restoration of the transaction manager. The developed transaction processing scheme provides the application with a mixture of pessimistic, hybrid optimistic and multiversioning concurrency control techniques to minimize the impact of replication on latency and optimize for read operations. The pseudocode of the relevant Wiki functions is presented and the different concurrency control techniques are evaluated in terms of message complexit</abstract>
    <identifier type="serial">07-43</identifier>
    <identifier type="issn">1438-0064</identifier>
    <identifier type="opus3-id">1075</identifier>
    <identifier type="urn">urn:nbn:de:0297-zib-10466</identifier>
    <author>Stefan Plantikow</author>
    <submitter>unknown unknown</submitter>
    <series>
      <title>ZIB-Report</title>
      <number>07-43</number>
    </series>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Verteilte Transaktionen</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Strukturierte Overlay-Netzwerke</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Peer-to-Peer</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Wikis</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Nebenläufigkeitskontrolle</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>distributed transactions</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>structured overlay networks</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>peer-to-peer</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>wikis</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>concurrency control</value>
    </subject>
    <collection role="ddc" number="004">Datenverarbeitung; Informatik</collection>
    <collection role="institutes" number="vas">Distributed Algorithms and Supercomputing</collection>
    <collection role="projects" number="2008-Scalaris">2008-Scalaris</collection>
    <file>https://opus4.kobv.de/opus4-zib/files/1046/ZR_07_43.pdf</file>
  </doc>
</export-example>
