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Replicated Allocation ie copies of one or more database fragments are stored at
several sites.
Wiki User
∙ 11y ago
Ahmad Hasan
explain the concept of modular drowth in DDBMS
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What are some areas of IT that should experience growth?
Network systems and data communications analysts Network and computer systems administrators Medical records and health information technicians Computer software engineers Database administrators Computer support specialists and systems analysts
Define database and its components?
A database system is a computer based record keeping System whose overall purpose is to record and maintain information that is relevant to the organization necessary for making decisions. With the growth of the database, these systems are used in various applications of real world such as • Banking System and ATM's machines. • Stock Trading Systems. • Flight Reservation Systems. • Computerized Library Systems. • Super Market Product Inventory System. • Credit Card/Credit Limit Check System. Database can range from those of a single user with a desktop computer to those on mainframe computers with thousands of users.
Should the gains of economic growth be evenly distributed?
of course why to be partial..
Advantages and disadvantages of distributed systems?
Advantage:Improved scalabilityUnlike a single-database system, in which the amount of data that can be stored depends on the limitations of one host and one database, a distributed-database system is easily scalable and, therefore, set up for growth. As more sites or regions become part of the Teamcenter Enterprise network, you can expand the database topology to include new databases.With multiple databases, Teamcenter Enterprise data is divided into logical pieces, so that users usually work only with the data that is most applicable to them.Improved performanceThe majority of database inserts, queries, updates, and deletions are on user data; therefore, a distributed-database environment separates user data from centralized or shared data and stores it locally. Local user databases reduce network traffic and eliminate network bottlenecks on most transactions.Local user databases also distribute the user load in terms of system resources, such as memory, I/O, and disk. In addition, a distributed-database environment separates the user data from the data related to operational or background processing, which also reduces the amount of local system resources used.Increased availabilityBecause user databases are independent, if one database is unavailable, users of other user databases can continue to work.In a distributed-database environment, selected classes are replicated in other databases when they are created, deleted, or updated. This replication increases availability. For example, by replicating administrative data to a local host, chances are increased that the data can be read when it is needed.By separating data, administrators have more flexibility in determining the frequency and types of backups needed for different types of data. This also increases availability.Disadvantage:Degradation of performance on a small networkOne user action can cause activity in several databases, some of which may be remote. The additional overhead of these transactions can be a performance penalty when the total amount of data in the network is small.Users also see slower performance when accessing user data that is not local. For this reason, the distribution of user data must be carefully planned to balance the need for local data with the desire for fast access to a large amount of data.Increased use of database spaceThe schema of all databases must be the same, that is, every table must exist in every database. Therefore, database space is used for tables that may never be accessed. When the number of tables is very large, the amount of space used this way can be significant. Administrators must use database storage parameters to size tables and reduce database space consumption.Complex use and administrationThe use and administration of distributed databases are more complex than for a single-database network:Users must be aware of the concept of database scope and where different types of data are stored.Administrators must keep the schemas of all databases synchronized and ensure that the network is configured to take optimal advantage of the distributed-database environment in terms of availability and performance.Although database backups are more flexible in a distributed-database environment, multiple databases add complexity to the backup process.
Why are drip irrigation systems more efficient than sprinkler systems?
Sprinkler systems are often used to water areas that have plants evenly distributed (such as a grass lawn). In this scenario a sprinkler is effective because the entire area needs water. Drip irrigation systems are more efficient when the main root areas are spread out (such as a fruit orchard) because they apply the water directly to the roots of the desired plants. This reduces the amount of evaporation loss and the loss from weed growth.
How do countries know if their economic systems are working?
If a countries economy, growth, and employment are strong they have a good indication that their economic systems are working.
Critics claim that what type of econmic systems hinders economic growth?
Socialism
Marked by the growth and maturation of the fetus's organs and body systems?
second trimester
What hair replacement systems are there?
There are several different options for hair replacement systems: * Hair plugging system. * Hair growth promoters. * Hair transfer systems. * Several others.
What are the functions of distributed Database management system?
• Data are located near "greatest demand" site • Faster data access • Faster data processing • Growth facilitation • Improved communications • Reduced operating costs • User-friendly interface • Less danger of a single-point failure • Processor independence
Does grow taller in 21 days work?
No. Growth "systems" are scams preying on the insecure
What did war contribute to EMS systems?
growth and technical development of prehospital emergency care
