Browse Definitions :
Definition

decoupled architecture

1.  In general, a decoupled architecture is a framework for complex work that allows components to remain completely autonomous and unaware of each other. Cloud computing is sometimes said to have a decoupled architecture because the cloud provider manages the physical infrastructure, but not the applications or data hosted on it.

2.  In computing, the term decoupled architecture describes a processor in a computer program that uses a buffer to separate the fetch and decode stages from the execution stage. A decoupled architecture allows each component to perform its tasks independently of the others, while also enabling structural variations between source and target.

The buffer in a decoupled architecture separates the program’s memory access and execute functions. The buffer takes advantage of the parallelism between the two to achieve high-performance while preventing the processor from “seeing” any memory latency.

In theory, a larger buffer can increase throughput. However, larger buffers generate more heat and use more space. Plus, the entire buffer may need to be flushed if the processor has a branch misprediction, thereby wasting clock cycles and reducing the effectiveness of the decoupled architecture. For these reasons, processors generally use a multi-threaded design.

Decoupled architectures are typically used in very long instruction word (VLIW) architectures. Because decoupled architectures are not good at handling control intensive code, such as that used as nested branches in operating system kernels, they are not used in general purpose computing.

See also: coupling, loose coupling, Multithreading, thread safe

This was last updated in March 2011
SearchCompliance
  • OPSEC (operations security)

    OPSEC (operations security) is a security and risk management process and strategy that classifies information, then determines ...

  • smart contract

    A smart contract is a decentralized application that executes business logic in response to events.

  • compliance risk

    Compliance risk is an organization's potential exposure to legal penalties, financial forfeiture and material loss, resulting ...

SearchSecurity
  • Secure Shell (SSH)

    SSH, also known as Secure Shell or Secure Socket Shell, is a network protocol that gives users, particularly system ...

  • NIST Cybersecurity Framework

    The NIST Cybersecurity Framework (NIST CSF) is a policy framework surrounding IT infrastructure security.

  • Advanced Encryption Standard (AES)

    The Advanced Encryption Standard (AES) is a symmetric block cipher chosen by the U.S. government to protect classified ...

SearchHealthIT
SearchDisasterRecovery
  • What is risk mitigation?

    Risk mitigation is a strategy to prepare for and lessen the effects of threats faced by a business.

  • change control

    Change control is a systematic approach to managing all changes made to a product or system.

  • disaster recovery (DR)

    Disaster recovery (DR) is an organization's ability to respond to and recover from an event that affects business operations.

SearchStorage
  • secondary storage

    Secondary storage is persistent storage for noncritical data that doesn't need to be accessed as frequently as data in primary ...

  • optical storage

    Optical storage is any storage type in which data is written and read with a laser.

  • JBOD (just a bunch of disks)

    JBOD, which stands for 'just a bunch of disks,' is a type of multilevel configuration for disks.

Close