0
FDBSs can be categorized as loosely
coupled or tightly coupled based on who
manages the federation and how the com-
ponents are integrated. interoperable database system ( loosely ) An FDBS is loosely
coupled if it is the user's responsibility to
create and maintain the federation and
there is no control enforced by the feder-
ated system and its administrators.
A federation is tightly
coupled if the federation and its adminis-
trator(s) have the responsibility for creat-
ing and maintaining the federation and
actively control the access to component
DBSs.
A loosely coupled FDBS always
supports multiple federated schemas. A
tightly coupled FDBS may have one or
more federated schemas. A tightly coupled
FDBS is said to have single federation if it
allows the creation and management of
only one federated schema.
A tightly coupled FDBS is
said to have multiple federations if it allows
the creation and management of multiple
federated schemas
Wiki User
∙ 15y ago
Add your answer:
Earn +20 pts
What are tightly and loosely coupled cluster systems?
Tightly coupled clusters are a group of machines that are largely dependent on each other. They are often used when latency is an important factor in the application. For example, a web cluster is often a tightly coupled cluster as the web servers/application servers require quick and consistent access to a shared storage system (network filesystem or database).Loosely coupled clusters are a group of machines (or groups of groups) which can operate independent of each other. Communications between nodes (or subclusters) is often done via a queuing system.
Why are the same wires hung tightly during winter?
to prevent from contrastin
What type of rock absorbs water?
The porosity is affected by the space between the particles which make up the rock, Loosely packed rocks such as sandstone will soak up water or allow it to pass through, while granite, because of its tightly intertwined mineral constituents, is non-permeable.
I had a weird noise when I was turning my car tightly and I could feel it My alternator just went and I just replaced it and oddly my car now turns fine Could a bad alternator cause that?
It probably isn't the alternator since it only happens when you turn the car tightly. Usually that would be caused by the steering hydraulic system due to a worn rack and pinion gear or power steering pump.
When cold water is poured over a tightly corked tin can containing steam the tin can gets crushed What crushes the tin can?
Air pressure from outside and vacuum effect from inside.
What are tightly and loosely coupled multiprocessor systems?
smp is tightly coupled ad cmp is loosly coupled
Is distributed system is loosely coupled or tightly coupled?
It can be either or even both - depends on how the designer(s) designed the distributed systems
What is the difference between closely coupled configuration and loosely coupled configuration in microprocessor?
Loosely coupled microprocessors are more like independent processors joined via a small communication link (a high speed bus or cable). This means that the connected microprocessors have their own local memory sets. They are low in performance. Also only microprocessors that can work independently may be used. Tightly coupled microprocessors share a common memory for the purpose of communication. One processor (slave) is dependent on the other (master). They are good at performance. The connected processors also have local memory sets for general purposes.
What are tightly and loosely coupled cluster systems?
Tightly coupled clusters are a group of machines that are largely dependent on each other. They are often used when latency is an important factor in the application. For example, a web cluster is often a tightly coupled cluster as the web servers/application servers require quick and consistent access to a shared storage system (network filesystem or database).Loosely coupled clusters are a group of machines (or groups of groups) which can operate independent of each other. Communications between nodes (or subclusters) is often done via a queuing system.
What is difference and similar between loosely-coupled system and tightly-coupled system?
The way I understand it is, that tightly coupled architecture does not provide a lot of flexibility for change when compared to loosely coupled architecture. For eg., if two disparate systems exchange messages, the message format has to be the same if they are tightly coupled. If the source uses java, the receiver should be able to read the message using java. Also, if any change is made is made to the source or the receiver systems, the other end has to be modified appropriately. But in case of loosely coupled architectures, message formats or operating platforms or revamping the business logic does not impact the other end. If the system is taken down for a revamp, of course the other end will not be able to access the service for a while but other than that, the unchanged end can resume message exchange as it was before the revamp.
What is a loosely coupled sytem?
A loosely coupled system is one in which each separate part (module) has very little direct interaction with each other module. The modules act largely independently of each other, each performing a small set of functions with data being passed from one module to another. This is an ideal situation because a loosely coupled system will require very few code changes if new modules are added, removed, or changed. A tightly coupled system will require a lot of recoding to make such changes. In the days where memory capacity was a limiting factor, tightly coupled code was essential to make it smaller and more efficient. Nowadays, except in some specialist applications, this is less importanat and having loosely coupled systems allows code to be developed by different people in different places and at different times.
What is the difference between tightly coupled and loosely coupled operating systems?
Tightly coupled clusters are a group of machines that are largely dependent on each other. They are often used when latency is an important factor in the application. For example, a web cluster is often a tightly coupled cluster as the web servers/application servers require quick and consistent access to a shared storage system (network filesystem or database).Loosely coupled clusters are a group of machines (or groups of groups) which can operate independent of each other. Communications between nodes (or subclusters) is often done via a queuing system.Tightly coupled clusters are a group of machines that are largely dependent on each other. They are often used when latency is an important factor in the application. For example, a web cluster is often a tightly coupled cluster as the web servers/application servers require quick and consistent access to a shared storage system (network filesystem or database).Loosely coupled clusters are a group of machines (or groups of groups) which can operate independent of each other. Communications between nodes (or subclusters) is often done via a queuing system.Read more: What_is_difference_and_similar_between_loosely-coupled_system_and_tightly-coupled_system
Are ions in magnesium fluoride held together loosely or tightly?
very tightly
What is the Difference between distributed systems and other systems?
A distributed system is a computer system composed of many smaller systems. Distributed systems generally consist of 10s, 100s, or even 1000s of networked computers working in parallel to accomplish a singular task. This approach to computing allows many less expensive computers to work together as a more powerful system. These systems can be either tightly coupled or loosely coupled. A tightly coupled distributed system would generally consist of 10s of computers centrally located with a high speed network connecting them. These systems can be very powerful and relatively inexpensive. Tightly coupled systems can move lots of data between the computers and attack huge problems that require lots of communication. A loosely coupled distributed system generally consists of 100s or 1000s of computers connected over the internet. These systems cannot communicate as quickly, so they are often used for problems where there is a lot of processing to be done and not much communication.
What are the difference between multipracessing and Custer systm?
Multiprocessing is the use of two or more central processing units (CPUs) within a single computer system. The term also refers to the ability of a system to support more than one processor and/or the ability to allocate tasks between them.There are many variations on this basic theme, and the definition of multiprocessing can vary with context, mostly as a function of how CPUs are defined (multiple cores on one die, multiple chips in one package, multiple packages in one system unit, etc.). Multiprocessing can be of 2 types: Loosely-coupled multiprocessor systems (often referred to as CLUSTER SYSTEMS) are based on multiple standalone single or dual processor commodity computers interconnected via a high speed communication system (Gigabit Ethernet is common). A Linux Beowulf cluster is an example of a loosely-coupled system. Tightly-coupled multiprocessor systems contain multiple CPUs that are connected at the bus level. These CPUs may have access to a central shared memory (SMP or UMA), or may participate in a memory hierarchy with both local and shared memory (NUMA). Tightly-coupled systems perform better and are physically smaller than loosely-coupled systems, but have historically required greater initial investments and may depreciate rapidly; nodes in a loosely-coupled system are usually inexpensive commodity computers and can be recycled as independent machines upon retirement from the cluster. Power consumption is also a consideration. Tightly-coupled systems tend to be much more energy efficient than clusters.
Are chromosomes tightly packed DNA or loosely packed DNA?
Chromosomes are tightly packed DNA. When DNA is not tightly packed it is called chromatin. Chromosomes only exist during mitosis or meiosis.
What is it called when the fibers of the spinal cord are loosely formed instead of being tightly together?
scoliosis
