A distributed database management system(DDBMS) is a software system that manages a distributed database while making the distribution transparent to the user. In simple meaning, the whole data of the database is not kept in one place instead it is distributed DBMS based on various parameters like the place, requirement, etc|What do you mean by distributed DBMS, and what are its types|
Most of you will be aware of Facebook, Facebook distributes its database based on the country and has multiple servers to handle its database. So a database can be distributed based on department, organization, company, people, etc |What do you mean by distributed DBMS, and what are its types|
Using this blog post(What do you mean by distributed DBMS and what are its types) we will explore What is the need for a distributed database? What is a distributed database with an example? What do you mean by distributed DBMS and what are its types? How does a distributed database work?…
…Advantages of distributed database, Distributed database design, Distributed database Management system|What do you mean by distributed DBMS and what are its types|
What is a distributed database with an example?| What do you mean by distributed DBMS and what are its types?
This is a database system where one data file is kept at a different location, and this location can be in the existing network or a different network. The same files are kept at different physical locations and then accessed by different users at various places.
A few examples of distributed database systems are Apache Ignite, Apache Cassandra, Apache HBase, Couchbase Server, Amazon SimpleDB, Clusterpoint, and FoundationDB.
What do you mean by distributed DBMS and what are its types?
A distributed database system is a system where the storage of data files is not limited to one machine. The data is spread over several computer systems whether in one network or different networks.
There are two types of distributed database systems:
Homogeneous:
Inside this type of distributed database system, all the data files and database architecture are the same at all the sites where it is kept. The data files, data structure, and database management system schema will be identical at all the sites.
Heterogeneous:
This is just the opposite of a homogeneous system. Here operating system, database application, data structure, and schema can be different from the other sites. One site can be unaware of other site management.
So it could problems in query processing and transaction. So, to avoid such a problem translation is done between each site about the updates of any application and software.
Distributed database storage: There are also two types:
Replication and fragmentation, Inside the replication the copies of the full database are kept across two or more sites and the queries can execute parallelly at all the sites.
And in the fragmentation data storage approach the small group of data after division is kept across the different sites.
How does a distributed DBMS work?
In a distributed database system environment the copy of data is kept at different physical locations. Now, this could be like storing all the copies of the database at the same physical location in multiple computer systems.
And the other way could be to keep these database copies in different networks interconnected.
Need for Distributed Database DBMS?/ What is the need for a distributed database?
In the distributed database system, there are several replicas of data placed in different places. They are all identical and can be accessed by users at all places.
These multiple instances of one data file at several places reduce the traffic in one place. And if one data file or instance is damaged or corrupted then our data file is still safe at the other places and we can again make a backup copy and place it again at the position.
If you see the enterprises then you will find they are already been distributed, at least logically(into divisions, departments, workgroups, etc.) and very likely physically too (into plants, factories, laboratories, etc.) from which it follows that data is usually distributed already as well.
Because each organization unit within the enterprise will maintain data that is relevant to its operation. The total information asset of the enterprise is thus splintered into what is sometimes called an island of information.
The distributed system provides the necessary bridges to connect those islands. In other words, it enables the structure of the database to mirror the structure of the enterprise.
Local data can be kept locally, where it most logically belongs while at the same time, remote data can be accessed when necessary.
so ultimately data distribution makes our work very easy as we can access the data frequently with high speed without any conflict and complication.
Difference between a Centralized database and a Distributed database?
Centralized Database system:
All the database is stored, managed, and maintained at one single place or location.
Since the database is stored at a single location it becomes easier to access the data and coordinate with the data.
Advantages:
The chance of data redundancy is very low as all the data is stored at one location so can be checked easily.
This type of database system is cheaper than other available database systems.
Disadvantages:
The data traffic is more in the case of centralizing database systems and this can cause slow processing and system hang problems sometimes.
In the case of system failure, all the data can be destroyed, so it is a must to keep a backup copy of the centralized database system somewhere with daily updates.
Distributed database system:
Advantages:
Data expansion is easy as the database is spared at a different-2 location so it is very little chance to overload data at a single point.
Data can be easily accessed from different networks.
Data is much more secure as compared to the centralized database system.
Disadvantages:
It is complex and difficult to manage and maintain.
It is difficult to provide a uniform view to the end-users as it is spread across multiple sites.
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Conclusion:
Distributed DBMS is all about reducing the complications in accessing the data. If data will be distributed based on its nature and category then it will be very easy to access the data without any traffic in one place. Hope you would have enjoyed this post(What do you mean by distributed DBMS and what are its types)?
Using this blog post(What do you mean by distributed DBMS and what are its types) we will explore What is the need for a distributed database? What is a distributed database with an example? What do you mean by distributed DBMS and what are its types? How does a distributed database work? Advantages of distributed database, Distributed database design, Distributed Database Management system.
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