Live Logic Programming
... Fred Brooks has famously distinguished essential and accidental complexity in the context of program development [6]. Accidental complexity arises when solving problems is complicated by the tools used to solve them, whereas essential complexity is inherent to the problem itself. It should be the go ...
... Fred Brooks has famously distinguished essential and accidental complexity in the context of program development [6]. Accidental complexity arises when solving problems is complicated by the tools used to solve them, whereas essential complexity is inherent to the problem itself. It should be the go ...
Distributed Databases
... • If all databases answered ”ready to commit”, coordinator sends ”commit” to all databases • If one (or more) databases answered ”cannot commit”, coordinator sends ”abort” to all databases. • Timeout: if one (or more) databases does not answer within a given amount of time, coordinator sends ”abort” ...
... • If all databases answered ”ready to commit”, coordinator sends ”commit” to all databases • If one (or more) databases answered ”cannot commit”, coordinator sends ”abort” to all databases. • Timeout: if one (or more) databases does not answer within a given amount of time, coordinator sends ”abort” ...
Replication
... records in different replicas are likely to have more record conflicts than applications that simply insert new records in a database. ...
... records in different replicas are likely to have more record conflicts than applications that simply insert new records in a database. ...
Lecture 20 - The University of Texas at Dallas
... Outside attackers sometimes have higher-level privileges by ...
... Outside attackers sometimes have higher-level privileges by ...
28SpCS157BL14TRC4NFASRppt
... • The degree of the relation resulting from a PROJECT operation is equal to the number of attributes in attribute-list. • If only non-key attributes appear in an attribute-list, duplicate tuples are likely to occur. The PROJECT operation, however, removes any duplicate tuples – this is called duplic ...
... • The degree of the relation resulting from a PROJECT operation is equal to the number of attributes in attribute-list. • If only non-key attributes appear in an attribute-list, duplicate tuples are likely to occur. The PROJECT operation, however, removes any duplicate tuples – this is called duplic ...
Oracle Architecture Basic
... Performs automatic process recovery Cleans up abnormally terminated connections Rolls back non committed transactions Releases resources held by abnormally terminated transactions Restarts failed shared server and dispatcher ...
... Performs automatic process recovery Cleans up abnormally terminated connections Rolls back non committed transactions Releases resources held by abnormally terminated transactions Restarts failed shared server and dispatcher ...
Document
... Strong consistency: a schedule with read and write operations on a replicated object should give results and final state equivalent to some schedule on a single copy of the object, with order of operations from a single site preserved ...
... Strong consistency: a schedule with read and write operations on a replicated object should give results and final state equivalent to some schedule on a single copy of the object, with order of operations from a single site preserved ...
1/16 Overview - Andrew.cmu.edu
... Non-loss changes to the logical structure can be made without changing application programs or end-user views Examples Change format of a field (zip from 5 to 9) Add a new data field Add a new table Divide a table into two ...
... Non-loss changes to the logical structure can be made without changing application programs or end-user views Examples Change format of a field (zip from 5 to 9) Add a new data field Add a new table Divide a table into two ...
Chapter 19: Distributed Databases
... Strong consistency: a schedule with read and write operations on a replicated object should give results and final state equivalent to some schedule on a single copy of the object, with order of operations from a single site preserved ...
... Strong consistency: a schedule with read and write operations on a replicated object should give results and final state equivalent to some schedule on a single copy of the object, with order of operations from a single site preserved ...
Database Applications
... The company owns a number of cars. For each car there is a need to know its type, year of manufacturing, number of places in the car and date of the last service. The company wants to have a record of car trips (körningar). A taxi may be picked on a street or ordered though an operator who assigns t ...
... The company owns a number of cars. For each car there is a need to know its type, year of manufacturing, number of places in the car and date of the last service. The company wants to have a record of car trips (körningar). A taxi may be picked on a street or ordered though an operator who assigns t ...
Association Rule Hiding by Heuristic Approach to Reduce Side
... database to hide the sensitive association rules [1]. Various heuristic algorithms are based on mainly two techniques: Data distortion technique and blocking technique. Data distortion is done by the alteration of an attribute value by a new value. It changes 1‟s to 0‟s or vice versa in selected tra ...
... database to hide the sensitive association rules [1]. Various heuristic algorithms are based on mainly two techniques: Data distortion technique and blocking technique. Data distortion is done by the alteration of an attribute value by a new value. It changes 1‟s to 0‟s or vice versa in selected tra ...
Introduction to Object Oriented Databases
... signal, looks to see if the address in question was a database address, and, if so, loads the object into memory and makes the address be legal by changing permission on the corresponding page. Figure 1 shows memory before LeftChild is accessed, and Figure 2 shows memory after LeftChild has been acc ...
... signal, looks to see if the address in question was a database address, and, if so, loads the object into memory and makes the address be legal by changing permission on the corresponding page. Figure 1 shows memory before LeftChild is accessed, and Figure 2 shows memory after LeftChild has been acc ...
Database systems: achievements and opportunities
... account A to account B, the database system must ensure that either both of the o p e r a t i o n s - - D e b i t A and Credit B - - h a p p e n or that neither happens (and the customer is informed). If only the first occurs, then the customer has lost $100, and an inconsistent database state resul ...
... account A to account B, the database system must ensure that either both of the o p e r a t i o n s - - D e b i t A and Credit B - - h a p p e n or that neither happens (and the customer is informed). If only the first occurs, then the customer has lost $100, and an inconsistent database state resul ...
Avi Silberschatz Michael Stonebraker Jeff Ullman Editors
... account A to account B, the database system must ensure that either both of the o p e r a t i o n s - - D e b i t A and Credit B - - h a p p e n or that neither happens (and the customer is informed). If only the first occurs, then the customer has lost $100, and an inconsistent database state resul ...
... account A to account B, the database system must ensure that either both of the o p e r a t i o n s - - D e b i t A and Credit B - - h a p p e n or that neither happens (and the customer is informed). If only the first occurs, then the customer has lost $100, and an inconsistent database state resul ...
Distributed Database
... Design relationship between replication management protocols andproblem. The they usually called the transaction theare concurrency The design of deal concurrency control techniques, since both concurrency control strategies On the other hand, the accessaffects many areas. It affects distributed dat ...
... Design relationship between replication management protocols andproblem. The they usually called the transaction theare concurrency The design of deal concurrency control techniques, since both concurrency control strategies On the other hand, the accessaffects many areas. It affects distributed dat ...
MS SQL SERVER 7.0
... Query engine has been redesigned to better handle complicated queries required by Decision Support System (DSS) . Improved query support for the new Micro Soft OLAP services. New Data Transformation Services (DTS) to facilitate transfer of data between SQL server and other databases…... ...
... Query engine has been redesigned to better handle complicated queries required by Decision Support System (DSS) . Improved query support for the new Micro Soft OLAP services. New Data Transformation Services (DTS) to facilitate transfer of data between SQL server and other databases…... ...
Data Confidentiality
... just inserting and deleting entire records, however. • We can also alter the contents of individual attribute values in specific records. ...
... just inserting and deleting entire records, however. • We can also alter the contents of individual attribute values in specific records. ...
REFERENCES
... [18] Elmasri R. and Navathe S. Fundamentals of Database Systems 3rd ed. New York, NY : Benjamin/Cummings, 2001. [19] S. Abiteboul and P. Kanellakis, “Object identity as a query language primitive”, Proceedings of the 1989 ACM SIGMOD, Portland, Oregon, June 89. ...
... [18] Elmasri R. and Navathe S. Fundamentals of Database Systems 3rd ed. New York, NY : Benjamin/Cummings, 2001. [19] S. Abiteboul and P. Kanellakis, “Object identity as a query language primitive”, Proceedings of the 1989 ACM SIGMOD, Portland, Oregon, June 89. ...
Implementing a Fuzzy Relational Database Using
... model is grounded in binary black-and-white but much of reality actually exists in shades of gray. As such, the conventional relational database model has limited usefulness. One area that illustrates this limitation is in the everyday, subjective language generally used to describe people. For inst ...
... model is grounded in binary black-and-white but much of reality actually exists in shades of gray. As such, the conventional relational database model has limited usefulness. One area that illustrates this limitation is in the everyday, subjective language generally used to describe people. For inst ...
slides - Tsinghua-CMU Double Master Degree Program in
... Have as much of the data required by each application at the site where the application executes Full replication ...
... Have as much of the data required by each application at the site where the application executes Full replication ...
Chapter 1
... update the database. Concurrency control within the DBMS guarantees that each transaction is correctly executed or aborted Recovery subsystem ensures each completed transaction has its effect permanently recorded in the database OLTP (Online Transaction Processing) is a major part of database applic ...
... update the database. Concurrency control within the DBMS guarantees that each transaction is correctly executed or aborted Recovery subsystem ensures each completed transaction has its effect permanently recorded in the database OLTP (Online Transaction Processing) is a major part of database applic ...
Dynamic Inference Control
... bottleneck through which all queries must pass. Similarly, the survivability benefit of distribution is not lost. The potential single point of failure represented by a centralized Rational Downgrader is avoided. The compartmentalization provided by a distributed scheme is preserved. Databases can p ...
... bottleneck through which all queries must pass. Similarly, the survivability benefit of distribution is not lost. The potential single point of failure represented by a centralized Rational Downgrader is avoided. The compartmentalization provided by a distributed scheme is preserved. Databases can p ...
fragments
... Client/Server is really an architecture which models a computerized solution based on the distribution of functions between servers and clients. A client requests specific services from a server and a server provides requested services to clients Distributed processing could be one aspect of client/ ...
... Client/Server is really an architecture which models a computerized solution based on the distribution of functions between servers and clients. A client requests specific services from a server and a server provides requested services to clients Distributed processing could be one aspect of client/ ...
DB Security Overview 2 Power Point
... automatic procedure that involves two distinct operations: rolling forward the backup to a more current time by applying online ...
... automatic procedure that involves two distinct operations: rolling forward the backup to a more current time by applying online ...
Database System Architectures
... Implementation Issues for Distributed Databases Atomicity needed even for transactions that update data at multiple sites The two-phase commit protocol (2PC) is used to ensure atomicity ...
... Implementation Issues for Distributed Databases Atomicity needed even for transactions that update data at multiple sites The two-phase commit protocol (2PC) is used to ensure atomicity ...