Skip to content
University of Maryland LibrariesDigital Repository at the University of Maryland
    • Login
    View Item 
    •   DRUM
    • College of Computer, Mathematical & Natural Sciences
    • Computer Science
    • Technical Reports from UMIACS
    • View Item
    •   DRUM
    • College of Computer, Mathematical & Natural Sciences
    • Computer Science
    • Technical Reports from UMIACS
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Dynamic Reconfiguration of Distributed Applications

    Thumbnail
    View/Open
    CS-TR-3210.ps (628.5Kb)
    No. of downloads: 236

    Auto-generated copy of CS-TR-3210.ps (449.1Kb)
    No. of downloads: 898

    Date
    1998-10-15
    Author
    Hofmeister, Christine R.
    Metadata
    Show full item record
    Abstract
    Applications requiring concurrency or access to specialized hardware are naturally written as distributed applications, where each software component (module) can execute on a different machine, and modules interact via bindings. In order to make changes to very long-running applications or those that must be continuously availablet we must dynamically change the application. Dynamic reconfiguration of a distributed application is the act of changing the configuration of the application as it executes. Examples of configuration changes are replacing a module, moving a module to another machine, and adding or removing modules from the application. The most challenging aspect of dynamic reconfiguration is that an application in execution has state information, both within the modules and within the communication channels between modules. This state information may need to be transferred from the old configuration to the new in order to reach an application state compatible with the new configuration. Thus, in addition to requiring a mechanism for changing the configuration during execution, dynamic reconfiguration requires that modules be able to divulge and install state information, and requires a mechanism for coordinating the communication during recon figuration. Prior to this work, all systems supporting some form of dynamic reconfiguration have given the application programmer no support nor even guidelines for capturing and restoring an application's state information. We have developed a machine-in dependent method for installing this functionality in the application, given a set of reconfiguration points designated by the programmer. This new technique has been implemented as part of the general framework we have developed to support dynamic reconf iguration of distributed applications. These reconfiguration capabilities were implemented on top of existing operating systems and compilers, requiring no modifications to either. They support dynamic reconfiguration for applications composed of mixed languages, communicating via message passing, running on a heterogeneous distributed platform. (Also cross-referenced as UMIACS-TR-94-8)
    URI
    http://hdl.handle.net/1903/613
    Collections
    • Technical Reports from UMIACS
    • Technical Reports of the Computer Science Department

    DRUM is brought to you by the University of Maryland Libraries
    University of Maryland, College Park, MD 20742-7011 (301)314-1328.
    Please send us your comments.
    Web Accessibility
     

     

    Browse

    All of DRUMCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

    My Account

    LoginRegister
    Pages
    About DRUMAbout Download Statistics

    DRUM is brought to you by the University of Maryland Libraries
    University of Maryland, College Park, MD 20742-7011 (301)314-1328.
    Please send us your comments.
    Web Accessibility