Proceedings

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In der LNI-Reihe "Proceedings" werden Tagungs- und Workshopbände veröffentlich. Grundsätzlich werden nur Proceedings von solchen Veranstaltungen in den LNI veröffentlicht, an denen eine GI-Gliederung beteiligt ist.

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Authors with most Documents  

Schroeder, Ulrik
79
Lucke, Ulrike
67
Busch, Christoph
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Thomas, Oliver
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Theuvsen, Ludwig
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Author: search.filters.author.Friedrich, SteffenHas files: No

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  • Conference Paper
    Towards a scalable and unified REST API for cloud data stores
    (Gesellschaft für Informatik e.V., 2014) Gessert, Felix; Friedrich, Steffen; Wingerath, Wolfram; Schaarschmidt, Michael; Ritter, Norbert; Plödereder, E.; Grunske, L.; Schneider, E.; Ull, D.
    In the last years, many database-as-a-service (DBaaS) systems have started to offer their functionalities through REST APIs. Examples are record stores like DynamoDB and Azure Tables, object stores such as Amazon S3 as well as many NoSQL database systems, for instance Riak, CouchDB and ElasticSearch. Yet today, there has been no systematic effort on deriving a unified REST interface which takes into account the different data models, schemas, consistency concepts, transactions, access-control mechanisms and query languages to expose cloud data stores through a common interface without restricting their functionality. This work motivates the design of such a REST API as well as the challenges of providing it in an extensible, scalable and highly-available fashion. To this end, we propose the REST middleware ORESTES that consists of an independently scalable tier of HTTP servers that map the unified REST API to aggregate-oriented (NoSQL) data stores. It extracts a wide range of DBaaS concerns (e.g. schema management and access control) and provides them in a modular, database-independent fashion at the middleware-level. To tackle the latency problem of cloud-based web applications we introduce the Bloom filter-bounded staleness cache consistency algorithm. It leverages the global web caching infrastructure for geo-replication to allow consistent low latency reads. We furthermore show the first steps towards a Polyglot Persistence Mediator that exploits the decoupling of the REST API from the data store to route data and operations based on SLAs.
  • Conference Paper
    Nosql OLTP benchmarking: A survey
    (Gesellschaft für Informatik e.V., 2014) Friedrich, Steffen; Wingerath, Wolfram; Gessert, Felix; Ritter, Norbert; Plödereder, E.; Grunske, L.; Schneider, E.; Ull, D.
    In recent years, various distributed NoSQL datastores have been developed that offer horizontal scalability and higher availability than traditional relational databases, but fewer querying options and only reduced consistency guarantees. The diversity of the design space makes it difficult to understand the performance implications of individual system designs. Existing benchmarking tools measure some relevant aspects, but do not capture all of them. In this paper, we give an overview of the state-of-the-art in NoSQL OLTP benchmarking, identify missing features as well as open challenges and point towards possible solutions.