query performance database corruption and other final thoughts
Tài liệu High-Performance Parallel Database Processing and Grid Databases- P1 pdf
... John Wiley & Sons, Inc., Publication High -Performance Parallel Database Processing and Grid Databases High -Performance Parallel Database Processing and Grid Databases David Taniar Monash University, ... 286 Grid Databases 10 Transactions in Distributed and Grid Databases 291 10.1 Grid Database Challenges 292 10.2 Distributed Database Systems and Multidatabase Systems 10.2.1 Distributed Database ... Overview: Parallel Databases and Grid Databases Parallel Query Processing: Motivations Parallel Query Processing: Objectives 1.3.1 1.3.2 1.3.3 1.4 10 12 Interquery Parallelism 13 Intraquery Parallelism...
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Tài liệu High-Performance Parallel Database Processing and Grid Databases- P2 docx
... database query processing Therefore, understanding skew modeling is a critical part of understanding parallel database query processing In Section 2.4, basic cost calculation for general parallel database ... models for parallel database processing can be found in Hameurlain and Morvan (DEXA 1995), Graefe and Cole (ACM TODS 1995), Shatdal and Naughton (SIGMOD 1995), and Ganguly, Goel, and Silberschatz ... Between, Not, and Like operators On the other hand, the discrete range search query uses discrete range check operators, such as In and Or operators An example of a continuous range search query is...
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Tài liệu High-Performance Parallel Database Processing and Grid Databases- P3 docx
... group-by attribute and performs the aggregate function Using Query 4.5 as an example, one node may produce, for example, (Math, 300) and (Science, 500) and another node (Business, 100) and (Science, ... Iyer and Dias (ICDE 1990) and DeWitt et al (1992) discuss systems issues in parallel database sorting Parallel sorting for databases uses external sorting methods Yamane and Take (1987) and Zhao ... of lecturers and courses from the same department” The query joins table Lecturer and table Course, and the join attribute is Ldept of Lecturer and attribute Cdept of Course In our database schema,...
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Tài liệu High-Performance Parallel Database Processing and Grid Databases- P4 pptx
... table R and table S jRj and jSj Number of records in table R and table S jRi j and jSi j Number of records in table R and table S on node i P Page size H Hash table size Query parameters πR and πS ... between the join query result and the product of the two tables R and S For example, if there are 100 and 200 records from table R and table S, respectively, and the join between R and S produces ... join) and Hua et al (VLDB 1991; IEEE TKDE 1995; proposing partition tuning to handle dynamic load balancing) Other work on skew handling and load balancing include DeWitt et al (VLDB 1992) and...
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Tài liệu High-Performance Parallel Database Processing and Grid Databases- P5 pptx
... spread spread, but spread not random randomly randomly not random randomly randomly not random randomly Figure 7.26 A comparative table for parallel multi-index selection query processing using a one-index ... table and the index Other than this restriction, it is possible to mix and match with other indexing structures 196 Chapter Parallel Indexing Algorithm:Parallel-One-Index-Selection (Query Q and ... two-index join query is a join query on two indexed attributes The main characteristic of a two-index join query is that processing such a query can be done by merging the two indexes In other words,...
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Tài liệu High-Performance Parallel Database Processing and Grid Databases- P6 doc
... cluster query processing model, and Section 9.6 describes dynamic cluster query optimization Finally, Section 9.7 briefly discusses other approaches to dynamic query optimization 9.1 QUERY EXECUTION ... from one extreme case (1 processor for subquery and N processors for subquery 2) to the other extreme case (N processor for subquery and processor for subquery 2) The most optimal configuration will ... where the skewed subquery is larger, and 268 Chapter Parallel Query Scheduling and Optimization (a) Nonskewed and Skewed Subqueries (same sizes) Subquery (Nonskewed) (b) Nonskewed and Skewed Subqueries...
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Tài liệu High-Performance Parallel Database Processing and Grid Databases- P7 ppt
... main differences between distributed databases and multidatabase systems 10.3 Discuss the suitability of parallel databases, distributed databases, and multidatabase systems in the Grids 10.4 Describe ... two-level (one local and another global) system This section gives an overview of distributed and multidatabase systems, and evaluates their suitability for the Grids 10.2.1 Distributed Database Systems ... requirements separate the two database systems Local database systems in multidatabase systems 298 Chapter 10 Transactions in Distributed and Grid Databases Global Data Dictionary Multidatabase/ Global DBMS...
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Tài liệu High-Performance Parallel Database Processing and Grid Databases- P8 pptx
... protocol, and explain how it solves the concurrency issues in the Grid 11.5 Compare and contrast the difference between GCC and any other concurrency control protocols (e.g., distributed databases and ... homogeneous and synchronous distributed database systems cannot be implemented in Grid databases because of architectural limitations (Grid databases are heterogeneous and asynchronous) (2) Multidatabase ... (distributed and multidatabase), and the recovery model for DBMS without global information (Grid database) Figure 12.8 shows the recovery model for an individual database site The stable database...
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Tài liệu High-Performance Parallel Database Processing and Grid Databases- P9 pdf
... data replication in the Grid is more common than in any other database systems (e.g., parallel databases, distributed databases, and multidatabase systems) 13.2 Discuss why replication may be a ... replication can increase the performance and availability of the system, while on the other hand, if not designed properly, a replicated system can produce worse performance and availability If the ... context of databases and data analysis, it is essential to understand the evolution of data mining, through databases and data warehousing, all of which have a common denominator called data or databases...
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Tài liệu High-Performance Parallel Database Processing and Grid Databases- P10 pptx
... differences between: 16.2 16.3 16.4 16.5 a Querying and association rules, b Querying and sequential patterns, c Querying and clustering, and d Querying and classification Use examples to highlight ... generalized into X ! Y , where X and Y are items in the supermarket, X and Y are not predefined in data mining On the other hand, database querying requires X as an input to the query, in order to find Y ... element of s1 , and y the last item of s2 , the new candidate is if y is a single item element, or add y to x otherwise For candidate 2-sequences, for all x F1 and y F1 , join x and y to become...
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Tài liệu McGraw.Hill.Oracle.Database.10g.Performance.Tuning.Tips.and.Techniques.Jul.2007 doc
... 6: Updated Explain and added sections on DBMS_MONITOR and TRCSESS ■ Chapter 7: Added new hints and updated others ■ Chapter 8: Updated and tested for 10gR2; added SQL and Grand Unified Theory ... caring attitude and dedication to help others!” —Joseph Flores Director Upward Bound, Purdue University Calumet, USA “Oracle Performance Tuning is certainly a complex topic, and Rich and the experts ... Database Instances and ASM Database Consolidation and Clustering with ASM Database Processes to Support...
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Tài liệu High-Performance Parallel Database Processing and Grid Databases- P11 doc
... Expression Query in Object Database Systems, Proceedings of Database Systems for Advanced Applications (DASFAA), pp 250258, 2001 CHAPTER 9: PARALLEL AND GRID QUERY OPTIMIZATION AND SCHEDULING Andrade, ... Parallel Query Processing, Proceedings of Cluster Computing and the Grid (CCGRID), 2003 Miranda, B., Lima, A.A.B., Valduriez, P., and Mattoso, M., Apuama: Combining Intra -query and Inter -query Parallelism ... System, Proceedings of Database and Expert Systems Applications (DEXA), pp 4854, 1992 Joshi, R and Aslandogan, Y.A., Concept-based web search using domain prediction and parallel query expansion, Proceedings...
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Tài liệu High-Performance Parallel Database Processing and Grid Databases- P12 ppt
... OLAP AND BUSINESS INTELLIGENCE Akal, F., Böhm, K., and Schek, H., “OLAP Query Evaluation in a Database Cluster: A Performance Study on Intra -Query Parallelism”, Proceedings of Advances in Databases ... Deloch, S., “Databases, Web Services, and Grid Computing—Standards and Directions”, Proceedings of Euro-Par, pp 3, 2003 Koparanova, M.G and Risch, T., “High -Performance GRID Stream Database Manager ... Talia, D., and Trunfio, P., “Parallel and Grid-Based Data Mining - Algorithms, Models and Systems for High -Performance KDD”, Proceedings of the Data Mining and Knowledge Discovery Handbook, pp...
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Tài liệu High-Performance Parallel Database Processing and Grid Databases- P13 doc
... INTELLIGENCE Akal, F., Böhm, K., and Schek, H., “OLAP Query Evaluation in a Database Cluster: A Performance Study on Intra -Query Parallelism”, Proceedings of Advances in Databases and Information Systems ... Deloch, S., “Databases, Web Services, and Grid Computing—Standards and Directions”, Proceedings of Euro-Par, pp 3, 2003 Koparanova, M.G and Risch, T., “High -Performance GRID Stream Database Manager ... Talia, D., and Trunfio, P., “Parallel and Grid-Based Data Mining - Algorithms, Models and Systems for High -Performance KDD”, Proceedings of the Data Mining and Knowledge Discovery Handbook, pp...
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Oracle9i Database Performance Tuning Guide and Reference Release 2 (9.2) pot
... Oracle performance by writing and tuning SQL properly, using performance tools, and optimizing instance performance It also explains how to create an initial database for good performance and includes ... 13 Creating a Database for Good Performance Building a Database for Performance Initial Database Creation Database Creation Using the Installer Manual Database Creation ... Trace and TKPROF instead Part III, "Creating a Database for Good Performance" This section describes how to create and configure a database for good performance Chapter 13, "Building a Database...
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Blindsided Why the Left Tackle Is Overrated and Other Contrarian Football Thoughts doc
... Jackson to Oakland for their number pick in 1979, number pick in 1980, and number pick in 1981 The Rams turned two of those picks into George Andrews and LeRoy Irvin and used the other to garner ... I needed It helped me land a job with ESPN.com and ESPN The Magazine and it also served as my introduction to many people throughout the NFL, including scouts, coaches, and executives of multiple ... use to lead and motivate their teams and organizations While I would never try to say that leadership and motivation are unimportant parts of the coaching process, there are many other areas...
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ALDEHYDE AND OTHER VOLATILE ORGANIC CHEMICAL EMISSIONS IN FOUR FEMA TEMPORARY HOUSING UNITS – FINAL REPORT pdf
... 2008 This final report includes updated data on acetic acid, a more detailed comparison of the results to regulatory product standards and published emission factors and updated figures and tables ... in this study were both aged and allowed to interact with emissions from other materials Formaldehyde and some of the other VOCs measured in the unoccupied THUs and the associated whole trailer ... regulatory product standards and published emission factors and updated figures and tables FEMA has supplied over 100,000 emergency THUs to families that lost their homes in Louisiana and Mississippi...
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Query Languages and Data Models for Database Sequences and Data Streams doc
... equivalent defines the two queries pUq and coalscp, the first on P and Q and the second on P only We will refer to them as the coalesce query and the until query, and observe that they are monotonic ... takes new tuples and a current state and output new tuples and a modified state and pass, prop, keep are three behavior functions that take punctuation marks and state as input and returns additional ... etc.) always return a sequence of length one and they are all nonmonotonic, and therefore blocking Continuous count and sum are monotonic and nonblocking, and thus suitable for continuous queries...
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Báo cáo y học: "IVBrainSeqDB: a database of annotated HIV envelope sequences from brain and other anatomical sites" ppt
... in the brain and other tissue reservoirs, and the relationship of these findings to each other and to clinical consequences of HIV infection, particularly development of HAND The database contains ... the database In addition, we assigned sequences into one of four classes: (i) Brain; (ii) Meninges, choroid plexus, and CSF; (iii) Blood and lymphoid; and (iv) Other Meninges, choroid plexus, and ... cuffing Other: cerebral atrophy 1 31 39 Other: CMV encephalitis Other: CNS lymphoma 242 Other: necrotizing encephalitis, not HIV-related 23 Other: progressive multifocal leukoencephalopathy 36 Other: ...
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