How the activities of Multimedia Database works in Facebook?
1) Creation and maintenance of relationships among multimedia objects and their efficient retrieval
Facebook use database systems to handle different kinds of data management and update.
Facebook also retrieve and display data required by the user. Facebook user can query in different ways, depending on the type of information they need. The objects retrieved from the Facebook database is appropriately presented and providing the user's view of the multimedia database. Facebook relationships between multimedia objects such as text, smileys, video, animations, audio, images can be use by the user using multimedia database. For example, Facebook user can upload their photos immediately after capture.
Facebook also retrieve and display data required by the user. Facebook user can query in different ways, depending on the type of information they need. The objects retrieved from the Facebook database is appropriately presented and providing the user's view of the multimedia database. Facebook relationships between multimedia objects such as text, smileys, video, animations, audio, images can be use by the user using multimedia database. For example, Facebook user can upload their photos immediately after capture.
2) Models
A database model is a type of data model that determines the logical structure of a database and fundamentally determines in which manner data can be stored, organized, and manipulated. Facebook database management system may provide network model. The optimal structure depends on the natural organization of Facebook application data, and on the application's requirements, which include transaction rate (speed), reliability, maintainability, capability, and cost. Facebook database management systems are built around network data model. Facebook application model is not just a way of structuring data, it also defines a set of operations that can be performed on the data. Facebook user's can access Facebook application via internet connection only.
Facebook network model is able to represent redundancy in data more efficiently than in the hierarchical model, and there can be more than one path from an ancestor node to a descendant. The operations of Facebook network model are navigational in style which is a program maintains a current position, and navigates from one record to another by following the relationships in which the record participates. Facebook network model gives excellent retrieval performance, at the expense of operations such as database loading and reorganization[3]
Facebook network model is able to represent redundancy in data more efficiently than in the hierarchical model, and there can be more than one path from an ancestor node to a descendant. The operations of Facebook network model are navigational in style which is a program maintains a current position, and navigates from one record to another by following the relationships in which the record participates. Facebook network model gives excellent retrieval performance, at the expense of operations such as database loading and reorganization[3]
3) Storage Management Content-Based Retrieval
Multimedia database management systems of Facebook can be seen as storage and retrieval systems, in which large volumes of media objects are created, modified, searched and retrieved. In content-based retrieval systems, Facebook application is the collections of multimedia objects are stored as digitized representations. The queries are characterized by down and doubt. Therefore, the user will not get from the beginning what she or he wants. Recall and content-based retrieval techniques can help, but the user is the one who will have the last word in appreciation of a query results. In additional, multimedia database of Facebook can store and retrieve data efficiently and at the same time it help to manage different types of multimedia data such as image, video, animation, text, graphic and others.
4) Presentation of Multimedia Objects
One of the activities that involves in Facebook is presentation of multimedia objects that requires immediate and sequential presentation of several representation types such as text, graphics, images, audio and video sequences. Therefore the presentation has to be arranged and the sequential relations of different actions have to be described. Facebook application also contain many emotions emoji, animations and graphics cartoon that allow user to use it as entertainment. The temporal relations are recognized by applying synchronization devices. Multimedia data in Facebook require large amount of storage space. Texts and images in Facebook are needed several MB but its need one hour for digitized and to compressed video. the video will requires 1GB or more.[1]
5) Multimedia Communication
Facebook user can communicate with other people using multimedia contents or objects in Facebook application. Facebook provides multimedia communication with text messaging, hold-to-talk voice messaging, group messaging, picture or video sharing, location sharing and contact information exchange. For example, Facebook mobile texts enable user to use SMS messages from their mobile phone instead of the Facebook app when responding to messages. User can't initiate messages, but they can receive and respond to them. Unlike the app, mobile texting doesn't use data. If user have limited text messages on their plan and send or receive a lot of mobile text messages from Facebook, it could cause overages on their plan. Also, Facebook mobile text isn't compatible with all phones or carriers. Facebook can be a good communication media to peoples all around the world.[10]