Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 41 for “"distributed database"”.
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Performance models of distributed database systems
Thesis (Sc.D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1981.
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Virtual time synchronization in distributed database systems
Distributed systems synchronized by Virtual Time have been topics of recent interest. Virtual Time follows an optimistic philosophy relying on rollback for synchronization instead of abortion or blocKing Although many applications have been suggested as candidates for Virtual Time, few were …
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Distributed Deadlock Detection in Distributed Database Systems
Deadlock detection in distributed database systems is very complicated and difficult to handle because of the distributed nature of the system and the communication delay of the network. Many detection algorithms have been proposed in the past, but most of them have been shown to be incorrect and …
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Integration of handheld computers into distributed database systems
Thesis (S.B. and M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1998.
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Query processing in heterogeneous distributed database management systems
… and developed in support of heterogeneous distributed database management systems. Heterogeneous distributed database management systems view the integrated data through an uniform global schema. The query processing algorithm described here produces an inexpensive strategy for a query …
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Performance Evaluation of Concurrency Control Algorithms in Distributed Database Management Systems
Submitted by Carly Hafner (chafner2@illinois.edu) on 2014-07-02T17:05:43Z No. of bitstreams: 1 1985_Siebel.pdf: 979777 bytes, checksum: a5d6910614e5f69b4cb0cf162c594b44 (MD5)
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Performance study of distributed deadlock detection algorithms for distributed database systems
Distributed deadlock in a distributed database system is a system state in which a set of concurrently running transactions are circularly waiting for each other to release resources. Over the past decade a number of algorithms have been proposed in the literature to detect such a deadlock, but not …
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A Network Surveillance Mechanism to Support Partitioned Operation in Distributed Database Systems
Data replication in distributed database systems is designed to achieve high reliability and availability. In case of network partitioning, the mutual consistency of data may become doubtful unless the transaction processing mechanism puts appropriate limits on its operation.
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An object-oriented approach towards enhancing logical connectivity in a distributed database environment
Thesis (M.S.)--Massachusetts Institute of Technology, Sloan School of Management, 1988.
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Optimistic Partitioned Operation in Distributed Database Systems (Network Partitioning, Replicated Data, Consistency, Recovery, Fault-Tolerance)
… threat to the availability of replicated data in distributed database systems. To provide high data availability during partitioning, an optimistic strategy for transaction processing will allow transactions to be processed in any partition. Conflict detection and resolution will then be performed …
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Modeling and Computation of Complex Interventions in Large-scale Epidemiological Simulations using SQL and Distributed Database
… are supplied from an external, standalone database which proved to be an effective way of implementing interventions. Although this setup performs well for simple interventions and small datasets, performance and scalability of complex interventions and large datasets remain an issue. In …
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Performance of Concurrency Control Methods in Distributed Database Management Systems (Timestamp Ordering, Two-Phase Locking, Optimistic Scheme, Restart, Transaction Blocking)
… developed, and the performances of those CCMs in distributed database management system (DDBMS) were simulated with some care to get statistically significant results. The performances of the CCMs were then compared with respect to several measures. This study systematically investigated effects …
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Performance Study of Two Phase Locking in Single-Site and Distributed Database Systems (Concurrency Control, Queueing Network, Pre-Claim, Ordering)
… (CCM) is studied in the contexts of single-site database systems (SDBSs) and distributed database systems (DDBSs).
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The design of robust protocols for distributed real-time systems
Modern distributed control systems comprise of a set of processors which are interconnected using a suitable communication network. For use in real-time control environments, such systems must be deterministic and generate specified responses within critical timing constraints. Also, they should be …
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Look-up tables : the benefit of enabling fine-grained routing and load balancing
… To address this explosion, storage systems like databases need to be distributed across many machines. Transactions that access a few tuples, often seen in web workloads such as Twitter, do not run optimally using traditional partitioning schemes [25]. Hence, increasing the number of machines …
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Developing distributed applications with distributed heterogeneous databases
… identifies how Tuxedo fits into the scheme of distributed database processing. Tuxedo is an On-Line Transaction Processing (OLTP) system. Tuxedo was studied because it is the oldest and most widely used transaction processing system on UNIX. That means that it is established, extensively …
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Estimating temporary file sizes for query graphs in distributed relational database systems
… of the front-end software, the Optimizer, of the distributed database system being developed at Virginia Tech. The Optimizer generates a strategy for optimal query processing, and it presents and analyzes a given query by means of query trees and query graphs. This thesis develops PASCAL …
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Using Blockchain to support Data & Service Monetization
… rely on the maturity of traditional NoSQL database systems to support these features. These databases, for example, MongoDB allows for very efficient query and retrieval of data it stores. However, centralized platforms come with a bag of security and privacy concerns, making them not the …
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Biovolume and ecoguild analysis of Late Paleozoic Ice Age benthic communities.
… Such studies, however, have relied on globally distributed database data, and conventional techniques for assessing community composition often fail to account for taxa that disarticulate readily post-mortem adequately. In this study, biovolume estimation techniques and ecological guild analysis …
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Robust data partitioning for ad-hoc query processing
… can significantly improve query performance in distributed database systems. Most proposed data partitioning techniques choose the partitioning based on a particular expected query workload or use a simple upfront scheme, such as uniform range partitioning or hash partitioning on a key. However, …
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