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Replication is useful when there are many read-only transactions at
different sites wanting access to the same data. They can all execute quickly
in parallel, accessing local data. But updates become difficult with replication.
Fragmentation is useful if transactions on different sites tend to access different
parts of the database.
What else can I help you with?
Why fragmentation and date replication are useful in Distributed DBMS?
Most people use Relational databases to simplify work. All a Distributed DBMS is a Relational Database spread over a wider area than the workplace. Fragmentation and Date replication are complications and experience says that Distributed DBMS are built to make life simpler
How might a distributed database designed for a local area network differ from one designed for a wide area network?
Data transfer on LAN is much faster than on WAN.Thus replication and fragmentation will not increase throughput and speed-up on a LAN, as much as in a WAN. But even in a LAN, replication has its uses in increasing reliability and availability.
What is Microsoft sql replication good for?
Microsoft SQL replication is good for copying and distributing important and useful data to various systems that are connected through a network or over the internet.
Replication that occurs between sites is called?
intersite replication
What are the names of some replication data software?
Some brands of replication data software include, but are not limited to : Sun StorageTek Availability Suite Software and EMC Data Replication Software.
Which type of replication compresses data to save WAN bandwidth?
intersite replication
What are distributed database design issues?
Three key issues we have to consider: • Data Allocation: where are data placed? Data should be stored at site with "optimal" distribution. • Fragmentation: relation may be divided into a number of sub-relations (called fragments) , which are stored in different sites. • Replication: copy of fragment may be maintained at several sites.
What is fragmentation and its significance?
Fragmentation is when a single file's data becomes distributed across a hard drive, taking longer to read it. Fragmentation generally only occurs in Microsoft's technique(s) of storing data, since Apple and Linux both use different methods.
What is the difference between volume fragmentation and data fragmentation in relation to disk drives?
Volume fragmentation is where the partition volume is physically split across the drive into variable pieces. This is common on HFS and some other filesystems that do not need to be sequential or single-piece, and virtual filesystems. Data fragmentation is when a file or data portion is physically split across a volume, rather than being in a single sequential piece. This is also called 'fragmentation' and can usually be remedied with a 'defragmenter'. It is usually an undesireable state, as it requires longer to load a fragmented file.
Which layer of OSI model does fragmentation based on MTU?
Data Link Layer
How difficult is data replication?
Data replication is difficult without formal technological training and/or education. A lot of the terms used to describe data replication and the processes necessary to complete it are computer-specific and could appear to be in a completely different language to a person that does not know much about computers or technology.
What is replication ID?
A replication ID is a unique identifier used in database replication to track changes made to data across different database instances. It helps in ensuring data consistency and integrity by allowing the replication process to record and synchronize changes accurately between databases.
