By András Horváth, Katinka Wolter
This booklet constitutes the court cases of the eleventh eu Workshop on functionality Engineering, EPEW 2014, held in Florence, Italy, in September 2014. The 18 complete papers offered during this quantity have been rigorously reviewed and chosen from 30 submissions. The papers are geared up in topical sections named: cloud functionality modelling; queueing and fluid types; functionality of computation and programming; becoming; city site visitors modelling; selection making; and Markovian types, above and past.
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Additional resources for Computer Performance Engineering: 11th European Workshop, EPEW 2014, Florence, Italy, September 11-12, 2014, Proceedings (Lecture Notes in Computer Science)
RMI is fastest among all the middleware but A Systematic Approach for Composing General Middleware Completions 43 unlike the others, is not language-independent. REST and (RMI+E) are similar because the marshalling plus encryption overhead in RMI have a similar effect to the exchange of ‘resources’ as large messages in REST. The ‘No MW’ line shows the ‘ideal’ case with only network latency as in Fig. 2(b), to compare with the cases with middleware overhead and additional messages. Fig. 10 shows the corresponding throughputs, saturating at values ranging from below 500 to 900 requests/s.
Relative errors of the proposed models: throughput (th), write latency (wr), read latency (re) node(s) Cassandra MongoDB HBase repl. A. queueing stations per node, representing respectively the CPU and the disk. A router models the choice of the node that will serve the requests: for Cassandra and HBase it implements a random selection policy. For MongoDB, it behaves diﬀerently for the read and for the write class. Read requests are randomly sent to the nodes. Write requests are sent to a single node (the topmost node of the model) to represent single-master replication of this speciﬁc database.
In: ICPE, pp. : NoSQL databases for RDF: An empirical evaluation. , et al. ) ISWC 2013, Part II. LNCS, vol. 8219, pp. 310–325. Springer, Heidelberg (2013)  Db engines. : Dynamo: Amazon’s highly available key-value store. SIGOPS Oper. Syst. Rev. : Analytical modeling of lock-based concurrency control with arbitrary transaction data access patterns. In: WOSP/SIPEW 2010, pp. 69–78. : Predicting replicated database scalability from standalone database proﬁling. In: EuroSys 2009, pp. 303–316. ACM, New York (2009)  Apache Software Foundation.