Database Engines on Multicores, Why Parallelize When You Can
... enforced through locking of shared data structures. All these features make the transition to modern hardware platforms difficult. It is now widely accepted that modern hardware, be it multicore, or many other developments such as flash storage or the memory-CPU gap, create problems for current data ...
... enforced through locking of shared data structures. All these features make the transition to modern hardware platforms difficult. It is now widely accepted that modern hardware, be it multicore, or many other developments such as flash storage or the memory-CPU gap, create problems for current data ...
Databases - McMaster University
... Like programming languages, databases allow to process and store data. However: ¡ data is stored in dedicated files and loaded as needed: data can be much larger than the available memory (retailer catalogue, bank accounts, personnel records); there is no need to explicitly open files and read ...
... Like programming languages, databases allow to process and store data. However: ¡ data is stored in dedicated files and loaded as needed: data can be much larger than the available memory (retailer catalogue, bank accounts, personnel records); there is no need to explicitly open files and read ...
INT7016 – Contemporary Issues in Database Development
... DBWR manages the database buffer cache so that user processes can always find free buffers as needed.(picture) The DBWR Process Writes all changed (modified) data buffers to the appropriate data files Uses an LRU algorithm to keep the most recently used data blocks in memory while aging out the ...
... DBWR manages the database buffer cache so that user processes can always find free buffers as needed.(picture) The DBWR Process Writes all changed (modified) data buffers to the appropriate data files Uses an LRU algorithm to keep the most recently used data blocks in memory while aging out the ...
Moving Objects Databases
... hence we can characterize them as moving points. However, there are also moving entities with an extent, for example, hurricanes, forest fires, oil spills, armies, epidemic diseases, and so forth. These we would characterize as moving regions. Extending database technology to deal with such objects ...
... hence we can characterize them as moving points. However, there are also moving entities with an extent, for example, hurricanes, forest fires, oil spills, armies, epidemic diseases, and so forth. These we would characterize as moving regions. Extending database technology to deal with such objects ...
Reengineering of Database Applications to EJB based Architecture
... classes. This close coupling of the object and relation runs against many software engineering principles, such as modularity, information encapsulation, usability, maintainability, etc. One of the objectives of the Enterprise JavaBean (EJB) [34] technology is to address gracefully this object-relat ...
... classes. This close coupling of the object and relation runs against many software engineering principles, such as modularity, information encapsulation, usability, maintainability, etc. One of the objectives of the Enterprise JavaBean (EJB) [34] technology is to address gracefully this object-relat ...
Lecture-24-30 (sections 9.1-9.7)
... A simple macro: - “Move to next record” button - GoToRecord action - If you go beyond the available records you’ll get an error message ...
... A simple macro: - “Move to next record” button - GoToRecord action - If you go beyond the available records you’ll get an error message ...
Semantic Wrapper over Relational Databases
... where time > '1993/01' and exists ( select * from FIXED-STATION where by-physical-observation-station-id = physical-observation-station-id-key and located-at--north-UTM = north-UTM-in-key and located-at-east-UTM = east-UTM-in-key and of--name = name-key)) union ( select MEASUREMENT-TYPE.*, NULL, NUL ...
... where time > '1993/01' and exists ( select * from FIXED-STATION where by-physical-observation-station-id = physical-observation-station-id-key and located-at--north-UTM = north-UTM-in-key and located-at-east-UTM = east-UTM-in-key and of--name = name-key)) union ( select MEASUREMENT-TYPE.*, NULL, NUL ...
Is Your Database System a Semantic Web Reasoner?
... this may require significant additional resources depending on the results’ size. Query rewriting in this sense is the most popular approach to OBQA for the lightweight ontology language OWL QL [7]. In many such applications, a traditional relational DBMS is used together with mapping rules that tra ...
... this may require significant additional resources depending on the results’ size. Query rewriting in this sense is the most popular approach to OBQA for the lightweight ontology language OWL QL [7]. In many such applications, a traditional relational DBMS is used together with mapping rules that tra ...
Nested Relational Databases
... store the part information must be traversed very quickly in order to display the part on the user's screen within an acceptable response time. Hundreds or thousands of join operations are required to display a complex part. These joins simply cannot be performed fast enough to provide acceptable di ...
... store the part information must be traversed very quickly in order to display the part on the user's screen within an acceptable response time. Hundreds or thousands of join operations are required to display a complex part. These joins simply cannot be performed fast enough to provide acceptable di ...
Connection Object - Pearson Education
... To connect to the database, you need a front-end application. In addition, you need to call the following functions in the code of the front-end application. 1. Call the SQLAllocEnv or SQLAllocHandle function to get an environment handle. 2. Call the SQLAllocConnect function. 3. Call the SQLConnect ...
... To connect to the database, you need a front-end application. In addition, you need to call the following functions in the code of the front-end application. 1. Call the SQLAllocEnv or SQLAllocHandle function to get an environment handle. 2. Call the SQLAllocConnect function. 3. Call the SQLConnect ...
biomedcentral.com
... BLAST command-line applications (i.e., blastall and blastpgp) were available to the public in late 1997. They are part of the NCBI C toolkit [3] and are supported on a number of platforms that currently includes Linux, various flavors of UNIX (including Mac OS X), and Microsoft Windows. The initial ...
... BLAST command-line applications (i.e., blastall and blastpgp) were available to the public in late 1997. They are part of the NCBI C toolkit [3] and are supported on a number of platforms that currently includes Linux, various flavors of UNIX (including Mac OS X), and Microsoft Windows. The initial ...
Access Project 1 - Maryville University
... • Click Save in box arrow • Click 3½ Floppy (A:), or select the corresponding drive for the media you are using • Click the File name text box • Use BACKSPACE key or the DELETE key to delete db1 • Type Ashton James College as the file name • Click the Create button to create the database ...
... • Click Save in box arrow • Click 3½ Floppy (A:), or select the corresponding drive for the media you are using • Click the File name text box • Use BACKSPACE key or the DELETE key to delete db1 • Type Ashton James College as the file name • Click the Create button to create the database ...
Application Server Performance – A Technical White Paper
... keep the instance around, reusing it for all clients who want to use the same session bean class. The exact algorithm is container specific. In fact , stateless session beans can be pooled, reused and swapped from one client to another client on each method call. This saves time of object instantia ...
... keep the instance around, reusing it for all clients who want to use the same session bean class. The exact algorithm is container specific. In fact , stateless session beans can be pooled, reused and swapped from one client to another client on each method call. This saves time of object instantia ...
4th Dimension, MS Access, and FileMaker Pro
... applications. Their needs can range from a simple database that tracks songs in an MP3 collection all the way to a multi-user client/server application that supports hundreds or even thousands of users as well as millions of records. The range of needs is quite broad so no database is ideal in all c ...
... applications. Their needs can range from a simple database that tracks songs in an MP3 collection all the way to a multi-user client/server application that supports hundreds or even thousands of users as well as millions of records. The range of needs is quite broad so no database is ideal in all c ...
Insert Title Here
... all of the FDs end up in just one relation (not split across two or more relations) Boyce-Codd Normal Form (BCNF) - no redundancy Introduction to Databases, B. Ludaescher & K. Lin ...
... all of the FDs end up in just one relation (not split across two or more relations) Boyce-Codd Normal Form (BCNF) - no redundancy Introduction to Databases, B. Ludaescher & K. Lin ...
W-7 OMT-II
... The new records are added at the end of the table. We can insert one row or various rows at the same time, normally getting the data from another table, and so an append query has a source (the table or tables where it gets the data from) and a destiny (the table where we will insert the data). The ...
... The new records are added at the end of the table. We can insert one row or various rows at the same time, normally getting the data from another table, and so an append query has a source (the table or tables where it gets the data from) and a destiny (the table where we will insert the data). The ...
Powerpoint
... • Design a database to match passengers with available flights on corporate jets – Companies phone in available seats • They want to know about interested passengers ...
... • Design a database to match passengers with available flights on corporate jets – Companies phone in available seats • They want to know about interested passengers ...
LN3
... referenced from other tuples in the database • Can be remedied by several actions: RESTRICT, CASCADE, SET NULL (see Chapter 8 for more details) – RESTRICT option: reject the deletion – CASCADE option: propagate the new primary key value into the foreign keys of the referencing tuples – SET NULL opti ...
... referenced from other tuples in the database • Can be remedied by several actions: RESTRICT, CASCADE, SET NULL (see Chapter 8 for more details) – RESTRICT option: reject the deletion – CASCADE option: propagate the new primary key value into the foreign keys of the referencing tuples – SET NULL opti ...
SAND CDBMS
... it is not necessary to use a third-party ETL tool. Most ETL tools were designed to load data into OLTP databases, and part of their func-tion is to build the kind of indexes and schemas that are not required by SAND CDBMS. However, in certain high-performance applications, users may choose an ETL to ...
... it is not necessary to use a third-party ETL tool. Most ETL tools were designed to load data into OLTP databases, and part of their func-tion is to build the kind of indexes and schemas that are not required by SAND CDBMS. However, in certain high-performance applications, users may choose an ETL to ...
Datalog and Emerging Applications: An Interactive
... systems to catch likely programming errors and aid query optimization [15]. Both systems support module mechanisms. LogicBlox additionally supports meta-programming, a reusability feature that has proven useful both within the company, and in areas such as security and distributed query processing [ ...
... systems to catch likely programming errors and aid query optimization [15]. Both systems support module mechanisms. LogicBlox additionally supports meta-programming, a reusability feature that has proven useful both within the company, and in areas such as security and distributed query processing [ ...
A Survey on Query Processing and Optimization
... A select-project-join query, an optimizer has to make many choices, the most important being: access methods, join order, join algorithms, and pipeling. [2] Access Method: The optimizer needs to pick an access method for each table in the query. Typically there are many choices, including a direct t ...
... A select-project-join query, an optimizer has to make many choices, the most important being: access methods, join order, join algorithms, and pipeling. [2] Access Method: The optimizer needs to pick an access method for each table in the query. Typically there are many choices, including a direct t ...
MedSchema_Draft - The BioText Project
... different times to accommodate other demands on the server. There are two types of application programming interfaces (APIs) for parsing XML files—the tree-based DOM (Document Object Model) and the event-based SAX (Simple API to XML) [8]. We chose the latter. A DOM parser organizes data from the XML ...
... different times to accommodate other demands on the server. There are two types of application programming interfaces (APIs) for parsing XML files—the tree-based DOM (Document Object Model) and the event-based SAX (Simple API to XML) [8]. We chose the latter. A DOM parser organizes data from the XML ...
slides - CS 491/591: Cloud Computing
... • The service can return the initial value for all requests • The system can provide weakened consistency, this is similar to web caches ...
... • The service can return the initial value for all requests • The system can provide weakened consistency, this is similar to web caches ...
Versant Object Database
Versant Object Database (VOD) is an object database software product developed by Versant Corporation.The Versant Object Database enables developers using object oriented languages to transactionally store their information by allowing the respective language to act as the Data Definition Language (DDL) for the database. In other words, the memory model is the database schema model.In general, persistence in VOD in implemented by declaring a list of classes, then providing a transaction demarcation application programming interface to use cases. Respective language integrations adhere to the constructs of that language, including syntactic and directive sugars.Additional APIs exist, beyond simple transaction demarcation, providing for the more advanced capabilities necessary to address practical issues found when dealing with performance optimization and scalability for systems with large amounts of data, many concurrent users, network latency, disk bottlenecks, etc.