Analytical Model for Performance Measurement of Queueing Systems
... • A Transaction is a logical unit of work on the database. • A Transaction may be an entire program, a portion of a program or even a single statement. • A Transaction brings the database from one consistent (correct/acceptable) state to another consistent state. • Consistent state is one in which a ...
... • A Transaction is a logical unit of work on the database. • A Transaction may be an entire program, a portion of a program or even a single statement. • A Transaction brings the database from one consistent (correct/acceptable) state to another consistent state. • Consistent state is one in which a ...
Recovery
... T2, and T3 are in DB and changes of T5 are NOT in the DB; nothing to do for TERMINATED transactions NO FORCE (why enforcing Durability is hard) Assume a transaction T has modified tuple on page P and T committed but update is not yet in the stable database? Now system crashes before modified page ...
... T2, and T3 are in DB and changes of T5 are NOT in the DB; nothing to do for TERMINATED transactions NO FORCE (why enforcing Durability is hard) Assume a transaction T has modified tuple on page P and T committed but update is not yet in the stable database? Now system crashes before modified page ...
Databases - Bannerman High School
... ADVANTAGES & DISADVANTAGES Physical Database - Searching can be slow - Editing is difficult Electronic Database + Searching is very fast + Editing is very easy ...
... ADVANTAGES & DISADVANTAGES Physical Database - Searching can be slow - Editing is difficult Electronic Database + Searching is very fast + Editing is very easy ...
distributed database
... ▫ New kinds of failure can arise : Failure of communication links and failure of a remote site at which a sub-transaction is executing. ▫ Either all sub-transactions of a given transaction must commit or none must commit, and this property must be guaranteed despite any combination of site and link ...
... ▫ New kinds of failure can arise : Failure of communication links and failure of a remote site at which a sub-transaction is executing. ▫ Either all sub-transactions of a given transaction must commit or none must commit, and this property must be guaranteed despite any combination of site and link ...
Recovery
... It is a technique pioneered in System R where changes are made to a copy of a page (block). When a transaction commits, the copy becomes the current page and the original is discarded ...
... It is a technique pioneered in System R where changes are made to a copy of a page (block). When a transaction commits, the copy becomes the current page and the original is discarded ...
PPT
... that the schedules are conflict/view serializable, and are recoverable and cascadeless . Concurrency control protocols generally do not examine the ...
... that the schedules are conflict/view serializable, and are recoverable and cascadeless . Concurrency control protocols generally do not examine the ...
ch5c - UCLA Computer Science
... Transaction Time of a fact: when it was recorded in the database ...
... Transaction Time of a fact: when it was recorded in the database ...
Database System Architectures
... where the transactions are executed, and results are shipped back to the client. ...
... where the transactions are executed, and results are shipped back to the client. ...
PE-I_ADS_syllabus
... 1. Apply the basic concept of parallel database to conventional databases 2. Evaluate the different modes of parallelism 3. Design the parallel database system Module 4 1. Understand the different application architectures 2. Design and deploy the enterprise application 3. Evaluate the performance o ...
... 1. Apply the basic concept of parallel database to conventional databases 2. Evaluate the different modes of parallelism 3. Design the parallel database system Module 4 1. Understand the different application architectures 2. Design and deploy the enterprise application 3. Evaluate the performance o ...
12. Recovery LECTURE - NDSU Computer Science
... Each viewing angle gives you a different view of the same object. Holographic data storage works in exactly the same way. But for every angle, instead of having another view of object, we have a completely different page of information." Up to 10,000 pages have been stored in a single cube of record ...
... Each viewing angle gives you a different view of the same object. Holographic data storage works in exactly the same way. But for every angle, instead of having another view of object, we have a completely different page of information." Up to 10,000 pages have been stored in a single cube of record ...
Database Administration Presentation
... Some databases, such as Oracle, do not actually halt processing. They simply write checkpoint information to files. ...
... Some databases, such as Oracle, do not actually halt processing. They simply write checkpoint information to files. ...
eXtremeDB® In-Memory Database System
... Incorporating third party software often means learning and adopting an API that does not completely fit an application. eXtremeDB’s native, project-specific API for development in C/C++ ensures that each database operation in the API reflects the type of data being manipulated (type safety). Option ...
... Incorporating third party software often means learning and adopting an API that does not completely fit an application. eXtremeDB’s native, project-specific API for development in C/C++ ensures that each database operation in the API reflects the type of data being manipulated (type safety). Option ...
Document
... messages (or a message asking the transaction to roll back, in case of a deadlock) The requesting transaction waits until its request is answered The lock manager maintains a data-structure called a lock table to ...
... messages (or a message asking the transaction to roll back, in case of a deadlock) The requesting transaction waits until its request is answered The lock manager maintains a data-structure called a lock table to ...
Network Management
... System Engineers, with the task of maintaining the system database. Maximum 2 participants/workstation. ...
... System Engineers, with the task of maintaining the system database. Maximum 2 participants/workstation. ...
PPT - Electrical and Computer Engineering Department
... transaction may not be serializable – it may find some records inserted by a transaction but not find others. Read committed — only committed records can be read, but ...
... transaction may not be serializable – it may find some records inserted by a transaction but not find others. Read committed — only committed records can be read, but ...
Elmasri/Navathe, Fundamentals of Database Systems, Fourth
... would not be committed, so their effect on the database can be redone from the log entries. (Notice that the log file must be kept on disk. At the time of a system crash, only the log entries that have been written back to disk are considered in the recovery process because the contents of main memo ...
... would not be committed, so their effect on the database can be redone from the log entries. (Notice that the log file must be kept on disk. At the time of a system crash, only the log entries that have been written back to disk are considered in the recovery process because the contents of main memo ...
Topics in Database Administration
... • Consistency: The transaction moves a database from one state of consistency, through inconsistency to another state of consistency. • Isolation: A transaction executes in isolation from other transactions. – This is also referred to as the “serializability” of transactions. – A transaction can aff ...
... • Consistency: The transaction moves a database from one state of consistency, through inconsistency to another state of consistency. • Isolation: A transaction executes in isolation from other transactions. – This is also referred to as the “serializability” of transactions. – A transaction can aff ...
BIS 3204 Database DB Programming
... database objects; Be able to write server side stored procedures and triggers; Apply the material in group database design and implementation of projects Indicative Content: In this course, students will design, critique and develop database applications using SQL with fourth generation languages an ...
... database objects; Be able to write server side stored procedures and triggers; Apply the material in group database design and implementation of projects Indicative Content: In this course, students will design, critique and develop database applications using SQL with fourth generation languages an ...
12recovery - NDSU Computer Science
... The IBM-Stanford Spintronic Science and Applications Center (SpinAps) will involve about a half-dozen Stanford professors and a similar number of IBM scientists. Research projects are funded by the two partners and agencies, including the Defense Advanced Research Projects Agency, the U.S. Departmen ...
... The IBM-Stanford Spintronic Science and Applications Center (SpinAps) will involve about a half-dozen Stanford professors and a similar number of IBM scientists. Research projects are funded by the two partners and agencies, including the Defense Advanced Research Projects Agency, the U.S. Departmen ...
Panel 1: Database Management in the Year 2000
... Industry experts in database management architecture from three corporations involved in database technology will but forward their projections, predictions or intuitions about database management system architectures in the year 2000. Specifically, the panelist will be asked to answer (or make comm ...
... Industry experts in database management architecture from three corporations involved in database technology will but forward their projections, predictions or intuitions about database management system architectures in the year 2000. Specifically, the panelist will be asked to answer (or make comm ...