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Paxos Quorum Leases

Iulian Moraru, David G. Andersen, Michael Kaminsky
2014 Proceedings of the ACM Symposium on Cloud Computing - SOCC '14  
This paper describes quorum leases, a new technique that allows Paxos-based systems to perform reads with high throughput and low latency. Quorum leases do not sacrifice consistency and have only a small impact on system availability and write latency. Quorum leases allow a majority of replicas to perform strongly consistent local reads, which substantially reduces read latency at those replicas (e.g., by two orders of magnitude in wide-area scenarios). Previous techniques for performing local
more » ... eads in Paxos systems either (a) sacrifice consistency; (b) allow only one replica to read locally; or (c) decrease the availability of the system and increase the latency of all updates by requiring all replicas to be notified synchronously. We describe the design of quorum leases and evaluate their benefits compared to previous approaches through an implementation running in five geo-distributed Amazon EC2 datacenters.
doi:10.1145/2670979.2671001 dblp:conf/cloud/MoraruAK14 fatcat:hwkhqvffwjeatf4mkb2oksohre

Exact pattern matching with feed-forward bloom filters

Iulian Moraru, David G. Andersen
2012 ACM Journal of Experimental Algorithmics  
This paper presents a new, memory efficient and cacheoptimized algorithm for simultaneously searching for a large number of patterns in a very large corpus. This algorithm builds upon the Rabin-Karp string search algorithm and incorporates a new type of Bloom filter that we call a feed-forward Bloom filter. While it retains the asymptotic time complexity of previous multiple pattern matching algorithms, we show that this technique, along with a CPU architecture aware design of the Bloom filter,
more » ... can provide speedups between 2× and 30×, and memory consumption reductions as large as 50× when compared with grep.
doi:10.1145/2133803.2330085 fatcat:endhgdzmx5bl5hml3r3c7l7sxy

Exact Pattern Matching with Feed-Forward Bloom Filters [chapter]

Iulian Moraru, David G. Andersen
2011 2011 Proceedings of the Thirteenth Workshop on Algorithm Engineering and Experiments (ALENEX)  
This paper presents a new, memory efficient and cacheoptimized algorithm for simultaneously searching for a large number of patterns in a very large corpus. This algorithm builds upon the Rabin-Karp string search algorithm and incorporates a new type of Bloom filter that we call a feed-forward Bloom filter. While it retains the asymptotic time complexity of previous multiple pattern matching algorithms, we show that this technique, along with a CPU architecture aware design of the Bloom filter,
more » ... can provide speedups between 2× and 30×, and memory consumption reductions as large as 50× when compared with grep.
doi:10.1137/1.9781611972917.1 dblp:conf/alenex/MoraruA11 fatcat:acgdhok67zgwtkeqgzjuwrn5ai

The Confusion – A Perfect Interference Between Competition and Industrial Property

Violeta COJOCARU, Iulian MORARU
2020 Eastern European Journal of Regional Studies  
Industrial property and competition are indissoluble in terms of the legal manner in which the unfair competition act of confusion is committed. The regulation of confusion within the competition legislation of the Republic of Moldova (Law no. 183/2012 on Competition) is in an explicit connection relationship with industrial property, given the fact that the trademarks, industrial designs and other industrial property objects are protected through the provisions of the Law no. 183/2012 on
more » ... ition as well. Thus, there is a double protection of industrial property objects: through the rules of industrial property and, at the same time, through those of unfair competition. In the same context, it is important to specify that under competition law are protected even industrial property objects that are not protected under industrial property division law. At the same time, in order to benefit from effective legal protection in accordance with the rules of unfair competition, there is a stringent need for a complex and effective bilateral evidentiary process. In order to validate the theoretical aspects stated above, the practice of the national competition authority of the Republic of Moldova (Competition Council) is essential.
doaj:4af27dc837e34a06a08df466b6a0138e fatcat:da6qljbxcvei5f2n4jxi3y6rdq

FAWNdamentally Power-efficient Clusters

Vijay Vasudevan, Jason Franklin, David G. Andersen, Amar Phanishayee, Lawrence Tan, Michael Kaminsky, Iulian Moraru
2009 USENIX Workshop on Hot Topics in Operating Systems  
dblp:conf/hotos/VasudevanFAPTKM09 fatcat:llwgjl2tq5f3xfinafv6iuqnri

There is more consensus in Egalitarian parliaments

Iulian Moraru, David G. Andersen, Michael Kaminsky
2013 Proceedings of the Twenty-Fourth ACM Symposium on Operating Systems Principles - SOSP '13  
This paper describes the design and implementation of Egalitarian Paxos (EPaxos), a new distributed consensus algorithm based on Paxos. EPaxos achieves three goals: (1) optimal commit latency in the wide-area when tolerating one and two failures, under realistic conditions; (2) uniform load balancing across all replicas (thus achieving high throughput); and (3) graceful performance degradation when replicas are slow or crash. Egalitarian Paxos is to our knowledge the first protocol to achieve
more » ... e previously stated goals efficiently-that is, requiring only a simple majority of replicas to be nonfaulty, using a number of messages linear in the number of replicas to choose a command, and committing commands after just one communication round (one round trip) in the common case or after at most two rounds in any case. We prove Egalitarian Paxos's properties theoretically and demonstrate its advantages empirically through an implementation running on Amazon EC2.
doi:10.1145/2517349.2517350 dblp:conf/sosp/MoraruAK13 fatcat:55bawmaoifhqxgc6uumas7oasq

SplitScreen: Enabling efficient, distributed malware detection

Sang Kil Cha, Iulian Moraru, Jiyong Jang, John Truelove, David Brumley, David G. Andersen
2011 Journal of Communications and Networks  
We present the design and implementation of a novel anti-malware system called SplitScreen. SplitScreen performs an additional screening step prior to the signature matching phase found in existing approaches. The screening step filters out most non-infected files (90%) and also identifies malware signatures that are not of interest (99%). The screening step significantly improves end-to-end performance because safe files are quickly identified and are not processed further, and malware files
more » ... n subsequently be scanned using only the signatures that are necessary. Our approach naturally leads to a network-based anti-malware solution in which clients only receive signatures they needed, not every malware signature ever created as with current approaches. We have implemented SplitScreen as an extension to , the most popular open source anti-malware software. For the current number of signatures, our implementation is 2× faster and requires 2× less memory than the original ClamAV. These gaps widen as the number of signatures grows.
doi:10.1109/jcn.2011.6157418 fatcat:3eqwwj5sbrd7foilznenjrpkme

The Discrediting of Competing Trademarks - Between Multiple Qualification Option and Qualification Impediment

Iulian Moraru, Moldova State University
2021 Eastern European Journal of Regional Studies  
Discrediting competing trademarks consists in the spread of certain information regarding the trademarks owned by the competitor of the undertaking realising the disparaging actions. Relating the idea to the legislative provisions in force of the Republic of Moldova, it can be inferred that there are two options for qualifying such a conduct - according to the rules of unfair competition and in accordance with the rules of dishonest advertising. In such circumstances, the obvious question
more » ... is whether the qualification will be done in accordance with one or another relevant legal norm. This aspect requires a broad clarification in the sense of offering viable alternative solutions and corresponding to the various practical factual situations. In this context, it is necessary to establish defined criteria in material and procedural terms in order to achieve a clear delimitation between different qualifying vectors. Circumstantially, there is a need to resort to the approach of domestic practice in this matter, as well as to the treatment of legislative, theoretical and practical trends in other states and legal systems.
doi:10.53486/2537-6179.7-1.10 fatcat:tj644dvs6bfehaqveei4dlasaq

Energy-efficient cluster computing with FAWN

Vijay Vasudevan, David Andersen, Michael Kaminsky, Lawrence Tan, Jason Franklin, Iulian Moraru
2010 Proceedings of the 1st International Conference on Energy-Efficient Computing and Networking - e-Energy '10  
This paper presents the architecture and motivation for a clusterbased, many-core computing architecture for energy-efficient, dataintensive computing. FAWN, a Fast Array of Wimpy Nodes, consists of a large number of slower but efficient nodes coupled with low-power storage. We present the computing trends that motivate a FAWN-like approach, for CPU, memory, and storage. We follow with a set of microbenchmarks to explore under what workloads these "wimpy nodes" perform well (or perform poorly).
more » ... We conclude with an outline of the longer-term implications of FAWN that lead us to select a tightly integrated stacked chip-and-memory architecture for future FAWN development.
doi:10.1145/1791314.1791347 dblp:conf/eenergy/VasudevanAKTFM10 fatcat:6b4uj2avdba2hdd6hlonjpqwwm

Challenges and opportunities for efficient computing with FAWN

Vijay Vasudevan, David G. Andersen, Michael Kaminsky, Jason Franklin, Michael A. Kozuch, Iulian Moraru, Padmanabhan Pillai, Lawrence Tan
2011 ACM SIGOPS Operating Systems Review  
This paper presents the architecture and motivation for a clusterbased, many-core computing architecture for energy-efficient, dataintensive computing. FAWN, a Fast Array of Wimpy Nodes, consists of a large number of slower but efficient nodes coupled with low-power storage. We present the computing trends that motivate a FAWN-like approach, for CPU, memory, and storage. We follow with a set of microbenchmarks to explore under what workloads these FAWN nodes perform well (or perform poorly),
more » ... briefly examine scenarios in which both code and algorithms may need to be re-designed or optimized to perform well on an efficient platform. We conclude with an outline of the longer-term implications of FAWN that lead us to select a tightly integrated stacked chipand-memory architecture for future FAWN development.
doi:10.1145/1945023.1945029 fatcat:ambe2hj4eze6thujboysdlenpu

Hindgut and Midgut Neuroendocrine Tumors - Therapeutic Approach

Mihaela Mădălina Gavrilescu, Ionuţ Huţanu, Bogdan Filip, Maria Gabriela Anitei, Mihaela Buna-Arvinte, Ana-Maria Muşină, Adrian Panuta, Vanda Moraru, Iulian Radu, Dragoş Viorel Scripcariu, Viorel Scripcariu
2019 Chirurgia  
Neuroendocrine tumors of the gastro-entero-pancreatic system have a variety of components, clinical manifestations and prognostic indices according to their anatomical site. Therefore, their diagnostic and management strategies differ a great deal. Prognosis concerning NETs can be poor due to the degree of differentiation, early metastasizing and the high degree of invasiveness. Material and Methods: For the present study, the patient files were evaluated and the parameters of interest were
more » ... owed. Results: Over the course of 6 years there were 37 patients diagnosed with and treated for NETs, regardless of primary tumor site. There were 9 patients with NETs of the primite mid-and hindgut thusly: 5 cases with colorectal NETs and 4 cases of small bowel NETs. 6 patients benefited from radical surgical treatment, 2 cases with palliative procedures and only one patient with tumor biopsy. The tumors were evaluated according to the 2010 WHO classification based on the number of mitoses and the Ki67 proliferation index. Adjuvant treatment was adapted according to staging and histopathological parameters. Conclusions: Despite recent progress in managing NETs, there are still many controversial aspects regarding the management of these cases, mainly about timing the right sequence of therapy.
doi:10.21614/chirurgia.114.2.243 fatcat:io2d7fdvpvco7hcmk6ifacjih4

Unfair Competition Actions in the Online Field

Cornelia GORINCIOI, Moldova State University, Chisinau, Iulian MORARU, Violeta COJOCARU, Moldova State University, Chisinau, Moldova State University, Chisinau
2019 Logos Universality Mentality Education Novelty Law  
The article approaches world trends of reorientation of TV and outdoor advertising towards Internet. However, in the process of on-line space occupation, unfair competitors continue to commit unfair competition acts, which are often manifested by inadequate advertising. At the same time, in the article there are elucidated the particularities of unfair competition acts identified in the on-line space, being presented as well the case law of the competition authority from Republic of Moldova.
more » ... article contains as well the argumentation of the necessity of the on-line advertising regulation, analyzing the existing law and presenting the data of the World Intellectual Property Organization, which denote a numeric growth of cases of infringement of trademarks right holders in the on-line domain.
doi:10.18662/lumenlaw/18 fatcat:2xr47tpairee5jdyimjar3hnbq

Sentiment, Perception and Policy Determinants of Foreign Direct Investment to European Developing Countries

BADEA LEONARDO, PANAIT IULIAN, SOCOL ADELA, MORARU ANDREEA DANIELA
2018 ECONOMIC COMPUTATION AND ECONOMIC CYBERNETICS STUDIES AND RESEARCH  
Panait, Adela Socol, Andreea Daniela Moraru of foreign direct investment on the development of economies.  ...  the global trend and pattern of foreign direct investment has been largely manifested throughout the last years and is especially based on the public recognition of the positive effect Leonardo Badea, Iulian  ... 
doi:10.24818/18423264/52.2.18.05 fatcat:bqqvtkfx4bfgjknmaho7vx4tay

History of codification of private law in the Republic of Moldova

Gheorghe Avornic, University of Political and Economic European Studies ", Violeta Cojocaru, Iulian Moraru, Constantin Stere", , Republic of Moldova, Moldova State University, Moldova State University
2021 Supremacy of Law  
Gheorghe AVORNIC, Violeta COJOCARU, Iulian MORARU HISTORy OF CODIFICATION OF PRIVATE LAw IN THE REPUBLIC OF MOLDOVA vele în materie de drept privat şi al protecţiei consumatorilor.  ...  Gheorghe AVORNIC, Violeta COJOCARU, Iulian MORARU HISTORy OF CODIFICATION OF PRIVATE LAw IN THE REPUBLIC OF MOLDOVA Codul Familiei al Republicii Moldova nr. 1316 din 26.10.2000.  ... 
doi:10.52388/2345-1971.2021.1.01 fatcat:r63n5tppvvgthnbwn76sbr2j4q

A preliminary study on population characteristics and ecology of the critically endangered meadow viper Vipera ursinii in the Romanian Danube Delta

Alexandru Strugariu, Ştefan Zamfirescu, Iulian Gherghel, Tiberiu Sahlean, Valentina Moraru, Oana Zamfirescu
2011 Biologia (Bratislava)  
AbstractThe present paper discusses preliminary data on population characteristics and ecology of the meadow viper Vipera ursinii in the Romanian Danube Delta. Using line transects and the Distance software, the size of the studied population was estimated at 321 (95% confidence interval: 166–618) individuals on a 62 ha area. The sex-ratio of the population was close to 1:1 and juvenile specimens were well represented. Half of the captured adult females were gravid, possibly indicating a more
more » ... an annual reproductive cycle. Analysis of sexual dimorphism of 12 morphometric traits indicated significant differences only in tail length and height. No significant relationships were detected between the size, sex, age or reproductive status and the thermal ecology of the vipers. Microhabitat selection and activity patterns varied with age, sex and reproductive status and are probably linked to an onthogenetic shift in feeding ecology and to behavioral differences between reproductive and non-reproductive females.
doi:10.2478/s11756-010-0146-z fatcat:lbqxutvuirdxjogrsdcihzycou
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