Changes between Version 4 and Version 5 of Overview


Ignore:
Timestamp:
11/16/11 12:48:08 (10 years ago)
Author:
branden
Comment:

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  • Overview

    v4 v5  
    4343Modules generally read a configuration file at startup time. This file contains basic Earthworm parameters which define the module, specify which message 'medium' (message ring) it wishes to listen to, and which message ring it wishes to broadcast it's output messages to. In addition, this file can contain arbitrary operating parameters specific to its operation. 
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    45 Error detection is accomplished via several mechanisms: Any module may broadcast an error message. Such messages are forwarded to a special module (wiki:startstop startstop]), which takes appropriate actions based on the nature of the complaint. Each module can also provide a periodic heartbeat; if this heartbeat should cease an error would then be declared and processed. A module may also request to be restarted if its heartbeat should cease. In addition, the Earthworm as a whole can produce a heartbeat to an external monitoring device. Such a monitoring device, capable of generating pager messages, is available as part of the Earthworm system. 
     45Error detection is accomplished via several mechanisms: Any module may broadcast an error message. Such messages are forwarded to a special module ([wiki:startstop startstop]), which takes appropriate actions based on the nature of the complaint. Each module can also provide a periodic heartbeat; if this heartbeat should cease an error would then be declared and processed. A module may also request to be restarted if its heartbeat should cease. In addition, the Earthworm as a whole can produce a heartbeat to an external monitoring device. Such a monitoring device, capable of generating pager messages, is available as part of the Earthworm system. 
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