• Study Resource
  • Explore
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
Chapter 19: Distributed Databases
Chapter 19: Distributed Databases

...  Alternative models carry out transactions by sending messages  Code to handle messages must be carefully designed to ensure atomicity and durability properties for updates Isolation cannot be guaranteed, in that intermediate stages are visible, but code must ensure no inconsistent states result d ...
All-Flash Arrays for Improving Database Performance to
All-Flash Arrays for Improving Database Performance to

... 2.1 Database Performance and Server and Storage System Resources Databases are used to extract the required information from large amounts of data at high speed. To achieve high-speed data access, database operations should be performed on the server as much as possible. The access frequency to the ...
chapter 3 - Central Washington University
chapter 3 - Central Washington University

...  Database designers document the logical data model with an entity-relationship diagram (ERD) which is a methodology for documenting databases illustrating the relationship between various entities in the database. ...
Windows Azure SQL Database
Windows Azure SQL Database

... › Includes: primary replica data, objects and indexes › Does NOT include: logs, master database, system tables, ...
A Cluster-Based Parallel Face Recognition System
A Cluster-Based Parallel Face Recognition System

... UMIST Face Database consists of 564 images of 20 people. Each covers a range of poses from profile to frontal views. Subjects cover a range of race/sex/appearance. Each subject exists in their own directory labeled 1a, 1b, ... 1t and images are numbered consecutively as they were taken. The files ar ...
Optimizing SQL
Optimizing SQL

... Problem: The planner has decided its faster to do a table scan than an index scan : This can happen if a) your table is relatively small, or the field you are indexing has a lot of duplicates. Solution: Case in point, boolean fields are not terribly useful to index since 50% of your data is one thin ...
Bringing DevOps to the Database
Bringing DevOps to the Database

... • Closing the Gap Between Database Continuous Delivery and Code Continuous Delivery - http://devops.com/2014/11/19/closing-gap-database-continuous-delivery-code-continuous-delivery/ - Where’s the Database in DevOps - https://www.red-gate.com/library/wheres-the-database-in-devops - How do Databases F ...
The Role of Multidimensional Databases in Modern Organizations
The Role of Multidimensional Databases in Modern Organizations

Access Chapter 1 PowerPoint
Access Chapter 1 PowerPoint

... • You connect the records in the separate tables through a common field • A primary key is a field, or a collection of fields, whose values uniquely identify each record in a table • When you include the primary key from one table as a field in a second table to form a relationship between the two t ...
SANSparallel: interactive homology search against Uniprot
SANSparallel: interactive homology search against Uniprot

... colorized by Mview (18) or sent to Skylign (19) to generate a sequence logo. Aligned or unaligned sequences can be output in FASTA format and sent to Jalview (20) for alignment visualization and editing. Our server does not provide multiple sequence alignments as this can be very time consuming. Ins ...
slides
slides

... important for the choices made when planning query execution. • Time for operations grow (at least) linearly with size of (largest) argument. • The total size can even be used as a crude estimate on the running time. ...
CS405G: Introduction to Database Systems
CS405G: Introduction to Database Systems

... • (almost) Equivalent to relational algebra query π A1, A2, …, An (σ condition (R1 X R2 X … X Rm)) ...
MYCH4
MYCH4

... Cross-product ( ) Allows us to combine two relations. Set-difference ( ) Tuples in reln. 1, but not in reln. 2. Union (  ) Tuples in reln. 1 and in reln. 2. Intersection, join, division, renaming: Not essential, but (very!) useful. ...
ppt - Information Systems
ppt - Information Systems

... Spatial and Geographic Databases  Spatial databases store information related to spatial ...
Temporal and Spatial Data
Temporal and Spatial Data

... Spatial and Geographic Databases  Spatial databases store information related to spatial ...
presentation
presentation

... Automapper’s capabilities • New Description Logic Constructs – IrreflexiveObjectProperty can be used to state that an OWL individual can not be related to itself – Other new constructs could be used as well but not in an automated fashion ...
SABIO-RK: A data warehouse for biochemical reactions and their
SABIO-RK: A data warehouse for biochemical reactions and their

... The curator has to check whether the ‘new’ compound, which was identified in a paper, is already stored within the SABIO-RK database. To support the curation process chemical compound names are automatically analyzed and identified. These comprise orthographic variance, syntactic and morphological v ...
cayf12e_ppt_12
cayf12e_ppt_12

... Publishing as Prentice Hall Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall ...
The Role of Databases in Sport Science: Current Practice and
The Role of Databases in Sport Science: Current Practice and

... Consulting Services, 2009). It is used to provide information about a university’s varsity sports teams allowing the team coach to easily update information as the season progresses. Sport Databases Databases are used in sport administration, in all of the sub-disciplines of sport science and in spo ...
ECDL Using Databases 6.0
ECDL Using Databases 6.0

... Although every care has been taken by ECDL Foundation in the preparation of this publication, no warranty is given by ECDL Foundation, as publisher, as to the completeness of the information contained within it and neither shall ECDL Foundation be responsible or liable for any errors, omissions, ina ...
pkirs.utep.edu
pkirs.utep.edu

... Computer support specialists provide help and advice to people and organizations using computer software or equipment. Some, called technical support specialists, support information technology (IT) Computer Support Specialists employees within their organization. Others, called help-desk technician ...
Slide 1
Slide 1

... This diagram depicts crow’s feet between the entities to describe the relationships. It shows a one-to-many (1:M) relationship between Department and Adviser and a many-to-many (N:M) relationship between Adviser and Student entities. ...
Tutorial 1
Tutorial 1

... • Add all the fields to your table by typing the field names in the column headings and pressing the Tab key or the Enter key to move to the next column • In the first row below the field names, enter the value for each field in the first record, pressing the Tab key or the Enter key to move from fi ...
Document - Oman College of Management & Technology
Document - Oman College of Management & Technology

... Granted on individual database objects Controls operations that a user can perform on a specific object (insert data, delete data, etc.) When you create an object in your user schema, you can then grant object privileges on that object to other database users ...
Document
Document

... • Add all the fields to your table by typing the field names in the column headings and pressing the Tab key or the Enter key to move to the next column • In the first row below the field names, enter the value for each field in the first record, pressing the Tab key or the Enter key to move from fi ...
< 1 ... 208 209 210 211 212 213 214 215 216 ... 459 >

Concurrency control

In information technology and computer science, especially in the fields of computer programming, operating systems, multiprocessors, and databases, concurrency control ensures that correct results for concurrent operations are generated, while getting those results as quickly as possible.Computer systems, both software and hardware, consist of modules, or components. Each component is designed to operate correctly, i.e., to obey or to meet certain consistency rules. When components that operate concurrently interact by messaging or by sharing accessed data (in memory or storage), a certain component's consistency may be violated by another component. The general area of concurrency control provides rules, methods, design methodologies, and theories to maintain the consistency of components operating concurrently while interacting, and thus the consistency and correctness of the whole system. Introducing concurrency control into a system means applying operation constraints which typically result in some performance reduction. Operation consistency and correctness should be achieved with as good as possible efficiency, without reducing performance below reasonable levels. Concurrency control can require significant additional complexity and overhead in a concurrent algorithm compared to the simpler sequential algorithm.For example, a failure in concurrency control can result in data corruption from torn read or write operations.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report