External data representation and marshalling

  • What is eXternal data representation in OS?

    XDR is implemented as a software library of functions which is portable between different operating systems and is also independent of the transport layer.
    XDR uses a base unit of 4 bytes, serialized in big-endian order; smaller data types still occupy four bytes each after encoding..

  • What is marshalling in data communication?

    In computer science, marshalling or marshaling (US spelling) is the process of transforming the memory representation of an object into a data format suitable for storage or transmission.
    It is typically used when data must be moved between different parts of a computer program or from one program to another..

  • What is the meaning of eXternal representation of data?

    The eXternal Data Representation (XDR) is a standard for the description and encoding of data.
    XDR uses a language to describe data formats, but the language is used only for describing data and is not a programming language..

  • Why do we need external data representation?

    External Data Representation (XDR) is a standard data serialization format, for uses such as computer network protocols.
    It allows data to be transferred between different kinds of computer systems.
    Converting from the local representation to XDR is called encoding..

  • CORBA's common data representation
    Marshalling operations can be generated automatically from the specification of the types of data items to be transmitted in a message.
  • Marshalling is the process of transforming the memory representation of an object into another format, which is suitable for storage or transmission to other software applications.
    Marshalling allows communication between remote objects by converting an object into serialized form.

Should external data representation and marshalling be reused?

External data representation and marshalling 4

3

External data representation and marshalling Over space: there may be many processes hosting remote objects Over time: It should not be reused after the object is deleted

Why not? its potential invoker may retain obsolete references

What is external data representation?

Even though programs represented data using data structures at runtime, they need to be converted into sequences of bytes before transmitting to another system

External Data Representation is a standard data serialization format that can be used to transmit data among different computer architectures

External Data Representation is a standard data serialization format that can be used to transmit data among different computer architectures. Marshalling is the process of transforming a collection of data items into a form that is suitable for transmission in a message. Unmarshalling is the reverse process.

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