What is external data representation and marshalling in distributed system?
External data representation: an agreed standard for the representation of data structures and primitive values. Marshalling: process of taking a collection of data items and assembling them into a form suitable for transmission. Unmarshalling: disassembling (restoring) to original on arrival.
What is marshalling and Unmarshalling in distributed systems?
Marshalling is the process of transforming the memory representation of an object to a data format suitable for the storage and transmission. Unmarshalling refers to the process of transforming a representation of an object that is used for storage or transmission to a representation of the object that is executable.
What is CDR in distributed system?
Common Data Representation (CDR) is used to represent structured or primitive data types passed as arguments or results during remote invocations on Common Object Request Broker Architecture (CORBA) distributed objects. It enables clients and servers written in different programming languages to work together.
What is the significance of external data representation XDR in RPC communication?
External data representation (XDR) is a standard for the description and encoding of data. The XDR protocol is useful for transferring data between different computer architectures and has been used to communicate data between very diverse machines.
Why XML is used for external data representation?
XML was designed to write structured Web documents. XML data items are tagged with the strings ‘markup. ‘ The tags are used to define the logical data structure, and to connect pairs of attribute-value with logical structures.
What is marshalling and its types?
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 RMI in distributed computing?
RMI stands for Remote Method Invocation. It is a mechanism that allows an object residing in one system (JVM) to access/invoke an object running on another JVM. RMI is used to build distributed applications; it provides remote communication between Java programs. It is provided in the package java. rmi.
What is multicast in distributed system?
In computer networking, multicast is group communication where data transmission is addressed to a group of destination computers simultaneously. Multicast can be one-to-many or many-to-many distribution.
What is XDR in NFS?
The NFS protocol data in RPC messages must be represented in a format that can be understood by both the sender and the recipient computer.