Implementation Techniques - Database Management System
Subject and UNIT: Database Management System: Unit IV: Implementation Techniques
Column oriented storage which is also called as columnar database management system that stores data in columns rather than rows.
Implementation Techniques - Database Management System
Subject and UNIT: Database Management System: Unit IV: Implementation Techniques
Definition:Data dictionary is mini database management system that manages the metadata.
Implementation Techniques - Database Management System
Subject and UNIT: Database Management System: Unit IV: Implementation Techniques
Any record can be placed anywhere in the file where there is a space. There is no ordering for placing the records in the file. Generally single file is used.
Implementation Techniques - Database Management System
Subject and UNIT: Database Management System: Unit IV: Implementation Techniques
A file organization is a method of arranging records in a file when the file is stored on disk.
Implementation Techniques - Database Management System
Subject and UNIT: Database Management System: Unit IV: Implementation Techniques
RAID stands for Redundant Array of Independent Disks. This is a technology in which multiple secondary disks are connected together to increase the performance, data redundancy or both.
Transactions - Database Management System
Subject and UNIT: Database Management System: Unit III: Transactions
A transaction can be defined as a group of tasks that form a single logical unit.
Transactions - Database Management System
Subject and UNIT: Database Management System: Unit III: Transactions
ARIES is a recovery algorithm. It stands for Algorithm for Recovery and Isolation Exploiting Semantics.
Transactions - Database Management System
Subject and UNIT: Database Management System: Unit III: Transactions
Shadow paging is a recovery scheme in which database is considered to be made up of number of fixed size disk pages.
Transactions - Database Management System
Subject and UNIT: Database Management System: Unit III: Transactions
Before discussing the recovery algorithms (deferred and immediate update), let us see the concept of Log and REDO and UNDO operations.
Transactions - Database Management System
Subject and UNIT: Database Management System: Unit III: Transactions
To ensure atomicity despite failures, we first output information describing the modifications to stable storage without modifying the database itself.
Transactions - Database Management System
Subject and UNIT: Database Management System: Unit III: Transactions
i) This error is caused due to internal conditions such as bad input, data not found,overflow of resource limit and so on. ii) Due to logical error the transaction can not be continued.
Transactions - Database Management System
Subject and UNIT: Database Management System: Unit III: Transactions
Deadlock is a specific concurrency problem in which two transactions depend on each other for something.