What is location transparency in distributed database?
Location transparency ensures that the user can query on any table(s) or fragment(s) of a table as if they were stored locally in the user’s site. The fact that the table or its fragments are stored at remote site in the distributed database system, should be completely oblivious to the end user.
What is a replication transparency?
Replication transparency is the ability to create multiple copies of objects without any effect of the replication seen by applications that use the objects. It should not be possible for an application to determine the number of replicas, or to be able to see the identities of specific replica instances.
What is a transparency in distributed system?
A transparency is some aspect of the distributed system that is hidden from the user (programmer, system developer, user or application program). Access Transparency There should be no apparent difference between local and remote access methods. In other words, explicit communication may be hidden.
What are different types of transparencies required in distributed systems?
Fragmentation transparency- In this type of transparency, the user doesn’t have to know about fragmented data and, due to which, it leads to the reason why database accesses are based on the global schema.
How location transparency is achieved in distributed system?
In a location transparency system, the actual location where the file is stored doesn’t matter to the user. A distributed system will need to employ a networked scheme for naming resources. The main benefit of location transparency is that it no longer matters where the resource is located.
Why is transparency required in distributed systems?
Transparency is an important characteristic of distributed systems, as it makes their operation in the eyes of the user to be more friendly, easy or simply transparent. Users should be unaware of the location of the services, and the transfer from a local to a remote machine should remain transparent to them.
Why is transparency important in distributed systems?
What is replication transparency in distributed systems?
Replication transparency is the term used to describe the fact that the user should be unaware that data is replicated. Beside above, what is distributed transparency and its types?
Transparency is an important characteristic of distributed systems, as it makes their operation in the eyes of the user to be more friendly, easy or simply transparent. Users should be unaware of the location of the services, and the transfer from a local to a remote machine should remain transparent to them.
Are access and location transparencies Generic Requirements in distributed systems?
However, access and location transparencies can be considered as generic requirements in any distributed system. Sometimes, the provision of these two forms of transparency is a prerequisite step toward the provision of other forms (such as migration transparency and failure transparency).
What is local mapping transparency in DDBMS?
A DDBMS that supports local mapping transparency requires that the user or programmer specify both the name and location of data fragments stored at remote locations. Having to specify data locations is undesirable, but this is complicated further when data is moved from one location to another.