Browse Definitions :
Definition

database availability group (DAG)

Matt Gervais
By

A database availability group (DAG) is a high availability (HA) and data recovery feature of Exchange Server 2010. 

A database availability group, which can consist of up to 16 Exchange mailbox servers, automates recovery at the database-level after a database, server or network failure. 

Database availability groups replaced Exchange Server 2007’s high-availability model, which was based on local continuous replication (LCR), standby continuous replication (SCR), single copy clustering (SCC) and cluster continuous replication (CCR).

Exchange administrators can choose to use DAGs in different geographic locations and in many different architectural designs and configurations, making it considerably more flexible than previous high-availability setups.

This was last updated in July 2012

Continue Reading About database availability group (DAG)

SearchNetworking
  • network packet

    A network packet is a basic unit of data that's grouped together and transferred over a computer network, typically a ...

  • virtual network functions (VNFs)

    Virtual network functions (VNFs) are virtualized tasks formerly carried out by proprietary, dedicated hardware.

  • network functions virtualization (NFV)

    Network functions virtualization (NFV) is a network architecture model designed to virtualize network services that have ...

SearchSecurity
  • data breach

    A data breach is a cyber attack in which sensitive, confidential or otherwise protected data has been accessed or disclosed in an...

  • insider threat

    An insider threat is a category of risk posed by those who have access to an organization's physical or digital assets.

  • data compliance

    Data compliance is a process that identifies the applicable governance for data protection, security, storage and other ...

SearchCIO
  • data privacy (information privacy)

    Data privacy, also called information privacy, is an aspect of data protection that addresses the proper storage, access, ...

  • leadership skills

    Leadership skills are the strengths and abilities individuals demonstrate that help to oversee processes, guide initiatives and ...

  • data governance policy

    A data governance policy is a documented set of guidelines for ensuring that an organization's data and information assets are ...

SearchHRSoftware
SearchCustomerExperience
  • recommerce

    Recommerce is the selling of previously owned items through online marketplaces to buyers who reuse, recycle or resell them.

  • implementation

    Implementation is the execution or practice of a plan, a method or any design, idea, model, specification, standard or policy for...

  • first call resolution (FCR)

    First call resolution (FCR) is when customer service agents properly address a customer's needs the first time they call.

Close