PPT
... System is deadlocked if there is a set of transactions such that every transaction in the set is waiting for another transaction in the set. Deadlock prevention protocols ensure that the system will never enter into a deadlock state. Some prevention strategies: Require that each transaction locks al ...
... System is deadlocked if there is a set of transactions such that every transaction in the set is waiting for another transaction in the set. Deadlock prevention protocols ensure that the system will never enter into a deadlock state. Some prevention strategies: Require that each transaction locks al ...
EJB Transactions
... • Is a single unit of work that consists of one or more operations that are interconnected. This means that each operation in a transaction must execute successfully in order for the transaction to complete. • Is used by an enterprise bean to maintain the accuracy and consistency of the information ...
... • Is a single unit of work that consists of one or more operations that are interconnected. This means that each operation in a transaction must execute successfully in order for the transaction to complete. • Is used by an enterprise bean to maintain the accuracy and consistency of the information ...
Introduction to Database Management
... Design and implement the DBMS modules and interfaces as a software package ...
... Design and implement the DBMS modules and interfaces as a software package ...
Abnormal Normalization
... transactional double-entry should include your credit to your banking account as well as debit to your software vendor. Your database becomes a transactional database when your database can be rolled back to rewrite a transaction that was not completed due to a power failure or loss of internet conn ...
... transactional double-entry should include your credit to your banking account as well as debit to your software vendor. Your database becomes a transactional database when your database can be rolled back to rewrite a transaction that was not completed due to a power failure or loss of internet conn ...
Buttons representing commands related to creating database
... • In its most basic form, a database is the electronic equivalent of an organized list of information. – Typically, this information has a common subject or purpose, such as the list of employees ...
... • In its most basic form, a database is the electronic equivalent of an organized list of information. – Typically, this information has a common subject or purpose, such as the list of employees ...
Chapter 5: Concurrency Control Techniques.
... Two-Phase Locking Techniques: Essential components Two locks modes (a) shared (read) and (b) exclusive (write). Shared mode: shared lock (X). More than one transaction can apply share lock on X for reading its value but no write lock can be applied on X by any other transaction. Exclusive mode: Writ ...
... Two-Phase Locking Techniques: Essential components Two locks modes (a) shared (read) and (b) exclusive (write). Shared mode: shared lock (X). More than one transaction can apply share lock on X for reading its value but no write lock can be applied on X by any other transaction. Exclusive mode: Writ ...
Distributed Databases
... Starting the execution of transactions that originate at the site. Distributing subtransactions at appropriate sites for execution. Coordinating the termination of each transaction that originates at the site, which may result in the transaction being committed at all sites or aborted at all sites. ...
... Starting the execution of transactions that originate at the site. Distributing subtransactions at appropriate sites for execution. Coordinating the termination of each transaction that originates at the site, which may result in the transaction being committed at all sites or aborted at all sites. ...
Introduction to Database Systems
... Interleaving actions of different user programs can lead to inconsistency: e.g., check is cleared while account balance is being computed. DBMS ensures such problems don’t arise: users can pretend they are using a single-user system. ...
... Interleaving actions of different user programs can lead to inconsistency: e.g., check is cleared while account balance is being computed. DBMS ensures such problems don’t arise: users can pretend they are using a single-user system. ...
Distributed database - GCG-42
... Allow multiple users to run transactions concurrently, with each transaction appears as if it is the only activity in the system Timestamping ...
... Allow multiple users to run transactions concurrently, with each transaction appears as if it is the only activity in the system Timestamping ...
Introduction to Database Systems
... All log related activities (and in fact, all CC related activities such as lock/unlock, dealing with deadlocks etc.) are handled transparently by the DBMS. ...
... All log related activities (and in fact, all CC related activities such as lock/unlock, dealing with deadlocks etc.) are handled transparently by the DBMS. ...
Lecture12 - Distributed Databases
... getting 2 different DBMS to work together (standards are emerging to make this easier) when all DBMS in a distributed database are the same, we call it a homogeneous system as distinct from a heterogeneous system (refer to figures 13-2 and 13-3) ...
... getting 2 different DBMS to work together (standards are emerging to make this easier) when all DBMS in a distributed database are the same, we call it a homogeneous system as distinct from a heterogeneous system (refer to figures 13-2 and 13-3) ...
For more information, please visit www.RoundupRiverRanch.org
... Database and Fulfillment Coordinator Title: Database and Fulfillment Coordinator Reports to: Director of Development and Marketing Location: Based out of Administrative Office in Avon, Colorado. With some time spent at the camp location in Gypsum, Colorado. Some travel may be required. Position Summ ...
... Database and Fulfillment Coordinator Title: Database and Fulfillment Coordinator Reports to: Director of Development and Marketing Location: Based out of Administrative Office in Avon, Colorado. With some time spent at the camp location in Gypsum, Colorado. Some travel may be required. Position Summ ...
Lecture Materials
... 1. Decrease the balance of account A by d dollars; 2. Increase the balance of account B by d dollars. 9.2 Introduction to Database Concepts If only the first operation is executed, then d dollars will disappear from the funds deposited with the bank. If only the second is executed, then the total fu ...
... 1. Decrease the balance of account A by d dollars; 2. Increase the balance of account B by d dollars. 9.2 Introduction to Database Concepts If only the first operation is executed, then d dollars will disappear from the funds deposited with the bank. If only the second is executed, then the total fu ...
SCS16L
... • Use triggers to guarantee that when a specific operation is performed, related actions are performed. • Use database triggers only for centralized, global operations that should be fired for the triggering statement, regardless of which user or database application issues the statement. • Do not d ...
... • Use triggers to guarantee that when a specific operation is performed, related actions are performed. • Use database triggers only for centralized, global operations that should be fired for the triggering statement, regardless of which user or database application issues the statement. • Do not d ...
Keywords: Database, Deadlock, Distributed
... One of the major problems in distributed systems is deadlock. A deadlock is a state where a set of processes request resources that are held by other processes in the set and none of the process can be completed [14, 15, and 16]. One process can request and acquire resources in any order without kno ...
... One of the major problems in distributed systems is deadlock. A deadlock is a state where a set of processes request resources that are held by other processes in the set and none of the process can be completed [14, 15, and 16]. One process can request and acquire resources in any order without kno ...
DATABASE MANAGEMENT SYSTEMS
... � applications linking to Oracle packages, e.g. forms and reports � Applications which need customized window interfaces 21. Define dynamic SQL. It allows programs to construct and submit SQL queries at run time. Dynamic SQL statements are stored as strings of characters that are entered when the p ...
... � applications linking to Oracle packages, e.g. forms and reports � Applications which need customized window interfaces 21. Define dynamic SQL. It allows programs to construct and submit SQL queries at run time. Dynamic SQL statements are stored as strings of characters that are entered when the p ...
A Technical Overview of SQL 2005 High Availability Features
... Database snapshots can be used to protect against application, user, or administrative error Use the new optimistic concurrency controls and ONLINE index operations to reduce database contention issues ...
... Database snapshots can be used to protect against application, user, or administrative error Use the new optimistic concurrency controls and ONLINE index operations to reduce database contention issues ...
Selective Requirement
... Summary Statement This class is responsible for performing a full range of database implementation and management functions for enterprise information systems. ...
... Summary Statement This class is responsible for performing a full range of database implementation and management functions for enterprise information systems. ...
Advanced Distributed Software Architectures and Technology group
... Application programs have bugs!!! System still has to be reliable!!!! – Fail cleanly (maintain data integrity) – Recover from transient errors – Recover after system failure Advanced Distributed Software Architectures and Technology group ...
... Application programs have bugs!!! System still has to be reliable!!!! – Fail cleanly (maintain data integrity) – Recover from transient errors – Recover after system failure Advanced Distributed Software Architectures and Technology group ...