By Emmanuelle Anceaume, Erwan Le Merrer, Romaric Ludinard (auth.), Roberto Baldoni, Paola Flocchini, Ravindran Binoy (eds.)
This publication constitutes the refereed court cases of the sixteenth foreign convention on ideas of allotted structures, OPODIS 2012, held in Rome, Italy, in December 2012. The 24 papers offered have been rigorously reviewed and chosen from 89 submissions. The convention is a global discussion board for the alternate of cutting-edge wisdom on disbursed computing and structures. Papers have been sought soliciting unique examine contributions to the speculation, specification, layout and implementation of disbursed systems.
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Additional info for Principles of Distributed Systems: 16th International Conference, OPODIS 2012, Rome, Italy, December 18-20, 2012. Proceedings
Although a leaf-oriented tree occupies more space than a node-oriented tree (since it contains up to twice as many nodes), the expected depth of a key or value is only marginally higher, since more than half of the nodes are leaves. Additionally, the fact that all updates in a leaf-oriented tree can be performed by a local change near the leaves dramatically simpliﬁes the task of proving that updates do not interfere with one another. Basic k-ST Operations. These operations are implemented as in .
Let rLATEJtaskidx be the time from tk to the deadline of LATEJtaskidx . Formally, this is expressed as: rLATEJtaskidx = ALATEJtaskidx + Dtaskidx - tk . From |ENTIREtaskidx | = qtaskidx (L), it follows from the deﬁnition of qi (L) and ri (L) that rLATEJtaskidx ≤ rtaskidx (L). ). 2, we have that job LATEJtaskidx has not yet ﬁnished execution at time tk . Hence, the assumptions in Lemma 8 are fulﬁlled. This gives us that it holds that job LATEJtaskidx performs at most: Ctaskidx -WJ(τtaskidx , z*( Dtaskidx - rtaskidx (L))/s, s) units of execution in the time interval [tk ,∞).
Sun (left) and Intel (right) results showing the performance of the k-ST for many values of k, and for various operation mixes. The Sun machine is running 128 threads, and the Intel machine is running 80 threads. We now discuss similarities between the experiments 5i-5d-40r-size100 and 20i-20d-1r-size100, which involve small range queries, before delving into their details. The results from these experiments are highly similar. In both experiments, all k-STs outperform Snap and Ctrie by a wide margin.