Download or read book Client side Caching for Client server OLAP Systems written by Elaheh Kamaliha and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recently, client-side data caching has become popular for building highly interactive web applications. This research is about client-side data caching in a client-server OLAP system. Contrary to the traditional OLAP systems, the system we study here is client-centric which contains a light-weight OLAP engine and a data cache, such that queries posed by the user may be processed on the client without a round-trip to the server. It has been shown that this system works better than the traditional ones in some data visualization scenarios. In this study, we focus on the client-side data caching in this system. We implemented a new data structure for storing multidimensional data on the client-side, which occupies a small memory footprint and decreases the load time significantly with a minimal client-side processing overhead. Also, we investigate the efficiency of client-side caching when the processing of the query needs extra data that are not already client-resident. Our results show that in some cases it could be cost-effective to download more than 80% of the required data from the server, rather than to download the entire sub-cube from the server.
Download or read book Maintaining Consistency in Client server Database Systems with Client side Caching written by Fahren Bukhari and published by . This book was released on 2012 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Caching and Materialization for Web Databases written by Alexandros Labrinidis and published by Now Publishers Inc. This book was released on 2010-02-19 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt: Database systems have been driving dynamic web sites since the early 90s; nowadays, even seemingly static web sites employ a database back-end for personalization and advertising purposes. In order to keep up with the high demand fuelled by the rapid growth of the Internet, a number of caching and materialization techniques have been proposed for web databases over the years. The main goal of these techniques is to improve performance, scalability, and manageability of database-driven dynamic web sites, in a way that the quality of data is not compromised. Although caching and materialization are well understood concepts in the traditional database and networking/operating systems literature, the Web and web databases bring forth unique characteristics that warrant new techniques and approaches. In this survey, we adopt a data management point of view to describe the system architectures of web databases, and analyze the research issues related to caching and materialization in such architectures. We also present the state of the art in caching and materialization for web databases and organize current approaches according to the fundamental questions, namely how to store, how to use, and how to maintain cached/materialized web data. Finally, we associate work in caching and materialization for web databases to similar techniques in other related areas, such as data warehousing, distributed systems, and distributed databases.
Download or read book Client Data Caching written by Michael J Franklin and published by . This book was released on 1996-03-31 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Associative Caching in Client server Databases written by Julie Basu and published by . This book was released on 1998 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: We first describe the architecture of A*Cache and its transaction execution model. We then develop new optimization techniques for improving the performance of A*Cache. Next, A*Cache performance is investigated through detailed simulation of a client-server database under many different workloads, and compared with other types of caching systems. The simulation results clearly demonstrate the effectiveness of our associative caching scheme for read-only environments, and also for read-write scenarios with moderately high data update probabilities.
Download or read book Performance Analysis of an Associative Caching Scheme for Client Server Databases written by Stanford University. Computer Science Department and published by . This book was released on 1997 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper presents a detailed performance study of the associative caching scheme proposed in "A Predicate-based Caching Scheme for Client-Server Database Architectures," The VLDB Journal, Jan 1996. A client cache dynamically loads query results in the course of transaction execution, and formulates a description of its current contents. Predicate-based reasoning is used on the cache description to examine and maintain the cache. The benefits of the scheme include local evaluation of associative queries, at the cost of maintaining the cached query results through update notifications >From the server. In this paper, we investigate through detailed simulation the behavior of this caching scheme for a client-server database under different workloads and contention profiles. An optimized version of our basic caching scheme is also proposed and studied. We examine both read-only and update transactions, with the effect of updates on the caching performance as our primary focus. Using an extended version of a standard database benchmark, we identify scenarios where these caching schemes improve the system performance and scalability, as compared to systems without client-side caching. Our results demonstrate that associative caching can be beneficial even for moderately high update activity.
Download or read book Hash Based Caching Mechanism for Web OLAP written by Bai Yu and published by . This book was released on 2014 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, the advent of client-side data caching techniques has brought significant performance improvement in highly interactive web applications. In this thesis, we focus on the client-side data caching mechanism in the web-based OLAP system. Previous work or methods on this area lack the universality of dealing arbitrary shapes of the cached data. For instance, in 2 dimensional data, it can only calculate the overlaps between two rectangles. While in reality, in most cases, the cached data can be any sizes and shapes. Therefore, we propose a new client-side hash based caching mechanism that can deal with arbitrary shapes of the dataset. Also, we come up with the idea of downloading the inflated sub-cubes in background and serve the users first. By combining this idea with our hash based caching mechanism, we can not only serve the users at the very first time, but also provide high performance for the subsequent cross-tab or drill-down operations by utilizing the cached inflated sub-cubes. Our result shows that this new method has great performance improvement compared with the previous method and when the size of the inflated sub-cubes is not so large, our mechanism also outperforms the no-cached one.
Download or read book Caching and Memory Management in Client server Database Systems written by Michael J. Franklin and published by . This book was released on 1993 with total page 650 pages. Available in PDF, EPUB and Kindle. Book excerpt: Both extensions are shown to be simple and effective ways to reduce dependence on server disk and cpu resources."
Download or read book Client Side Consistency Mechanisms and Security Provisions for Cache Deployment in MANETs written by Kassem Mohammad Fawaz and published by . This book was released on 2011 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work proposes a client-based cache consistency scheme that is implemented on top of a previously proposed architecture for caching data items in MANETs that caches submitted queries in special nodes, called query directories (QDs), and uses them to locate the data (responses) that are stored in the nodes that requested them, called caching nodes (CNs). In this work, we introduce a totally client-based scheme that is termed DCIM which works by having the QD nodes monitor the TTL values of the cached data items and estimate update patterns on the server to adapt the TTL values accordingly. The QDs also monitor the request rates for data items and decide accordingly which items to prefetch. DCIM is analyzed to assess the delay and bandwidth gains (or costs) when compared to polling every time, and was also simulated along with two other client based schemes to assess its performance experimentally. The consistency ratio, delay, and overhead traffic are reported versus several variables, and DCIM shows to be superior when compared to existing systems.--Furthermore, DCIM is extended to handle multiple replicas inside the MANET. For this purpose, it utilizes a push based approach to propagate updates to replicas inside the network. The result is a hybrid approach that utilizes the benefits of pull approaches for client server communication, and the benefits of push approaches inside the network between the replicas. This method is analyzed mathematically, and the optimal number of replicas is obtained. It is concluded that full replication at the QDs and partial replication at the CNs is optimal. This finding is used to design the replica allocation scheme using a cost minimization model that enhances the operation of DCIM in terms of access delay and data hit rate. At the end, we provide a security analysis for the operations of the proposed system.
Download or read book High Performance Client Server written by Chris Loosley and published by . This book was released on 1998 with total page 788 pages. Available in PDF, EPUB and Kindle. Book excerpt: And he covers all the key topics, with chapters on Middleware, Architecture, Design, Tools, Databases, Replication, Warehousing, and Transaction Monitors.
Download or read book Cache Consistency and Design Issues for Client side Caching in Network based File Systems written by Brian Y. G. Byun and published by . This book was released on 1986 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Client server Performance Tuning written by Sid Wise and published by McGraw-Hill Companies. This book was released on 1997 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: Network services expert Sid Wise offers a systems-tuning solution that really delivers. The book provides a practical program for measuring losses--finding the roots of poor performance--and recovering productivity by specifically targeting operating environments and applications architectures. Easy to read, the guide is based on real life scenarios. Coverage includes UNIX, MVS, Windows NT, and OS/2 environments.
Download or read book Database and Expert Systems Applications written by Vladimir Marik and published by Springer. This book was released on 2003-10-02 with total page 963 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 14th DEXA 2003 International Conference on Database and Expert - stems Applications was held during September 1–5, 2003 at the Czech Technical UniversityinPrague,CzechRepublic.TheDEXAlineofconferenceshasalready gained its own reputation and respected position as a platform for the exchange of ideas among theoreticians and practitioners in the wider area of computer science, but mainly in the areas of database and knowledge-based technologies. Since DEXA 1993, which was held in Prague, DEXA has grown into a m- ticonference consisting of four more focused and specialized conferences besides DEXA itself, namely the DaWak conference, EC-Web conference, eGOV c- ference, and this year happening for the ?rst time, the HoloMAS conference. In addition, the DEXA workshop is a special event o?ering enough space for specialized discussion, and acting – in a certain sense – as an incubator for new conferences. The DEXA conference itself is growing in volume and quality each year. This time there were 236 papers submitted and reviewed and the program committee selected 91 of the best papers to be included in this volume. Each of the subm- ted papers was carefully reviewed by at least three independent PC members or external reviewers. The DEXA proceedings quite clearly re?ect the current trends in the da- base area and we are happy with the balanced content of both the conference and the proceedings.
Download or read book Performance Studies of Cache Consistency and Concurrency Control Algorithms in A Distributed Client server DBMS Architecture written by Yongdong Wang and published by . This book was released on 1992 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Highly Concurrent Cache Consistency for Object oriented Database Systems written by Markos Zaharioudakis and published by . This book was released on 1997 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Performance of a Client side Web Caching System written by Ying-Lin Chen and published by . This book was released on 2000 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis investigates the implementation of a web caching system located on the client system.
Download or read book A Cooperative Caching Architecture for Improving Database Queries written by Andrei Aurel Vancea and published by Createspace Independent Publishing Platform. This book was released on 2014-07-02 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: Client side caching is a commonly used technique for reducing the response time of database queries. Semantic caching is a database caching approach in which results of old queries are cached and used for answering new queries. A new query will be split in a part that retrieves the portion of the result, which is available in a local cache (probe query) and a query that retrieves missing n-tuples for the database server (remainder query). This approach is especially suited for low-bandwidth environments or when database server is under heavy load. Semantic caching was successfully applied for optimizing the execution of queries on mobile clients or over lousy-coupled wide-area networks. Peer-to-Peer(P2P) networks have been applied successfully for improving the performance of cache systems. This thesis aims to use a P2P approach in order to enhance the semantic caching technique. Therefore, The Cooperative Semantic Caching (CoopSC) approach extends the general semantic caching mechanism by using a P2P (Peer-to-peer) approach in order to enable clients to share their local semantic caches in a cooperative manner. When executing a query, the content of both the local semantic cache and entries stored in caches of other clients can be used. A new query will be split into a probe, remote probes, and a remainder query. The probe retrieves the part of the answer which is available in the local cache. Remote probes retrieve those parts of the query which are available in caches of other clients. The remainder retrieves the missing n-tuples from the server. In order to execute the query rewriting, the cache entries of all clients are indexed in a distributed data structure built on top of a P2P overlay that is formed by all clients which are interrogating a particular database server. The general cooperative semantic approach also contains a mechanism for handling operations that modify the content of the database. During this thesis, the general approach was applied in the context of two real-life use-cases: cloud-computing environments, and NetFlow-based network monitoring solutions. This thesis shows that a cooperative semantic caching approach is technical feasible and such an approach approach increases the performance of databases systems. Moreover, in the context of such an approach, update handling can be executed with a reasonable performance when read-intensive workloads are executed. Finally the general CoopSC approach presents economic advantages when used within cloud-computing environments and improves the performance of NefFlow-based network monitoring solutions.
