Difference between revisions of "uaCap:Redundancy NonTransparent"

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<br>Client must use failover mode to determine required actions to take when Server fails.
 
<br>Client must use failover mode to determine required actions to take when Server fails.
  
{{uaConformance|TBD <!-- Client -->|
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{{uaConformance|
TBD <!-- Server -->
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Failover for this type of redundancy requires the Client to monitor Server status and to switch to a backup Server if it detects a failure. The failover method tells the Client what it must do when connecting to a Server and when a failure occurs. Cold redundancy requires a Client to reconnect to a backup Server after the initial Server has failed. Warm redundancy allows a Client to connect to multiple Servers, but only one Server will be providing values. In hot redundancy multiple Servers are able to provide data and a Client can connect to multiple Servers for the data.
<!-- Example
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* [http://opcfoundation.org/UA-Profile/Server/GlobalCertificateManagement '''Global Certificate Management Server Profile''']
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The Server shall expose the methods of failover it supports (cold, warm or hot).
* [http://opcfoundation.org/UA-Profile/Client/GlobalCertificateManagement '''Global Certificate Management Client Profile''']
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<br>
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[http://opcfoundation.org/UA-Profile/Server/VisibleRedundancy '''Non-transparent redundancy''']
 
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Revision as of 08:08, 16 February 2015

URN:          https://opcfoundation.org/wiki/index.php/Redundancy/ServerNon-TransparentFailover

Description
Client is aware that Server failover has occurred. When a Server fails, the number of actions required by Client depends on the failover mode supported by the Server.
There are four failover modes: Cold, Warm, Hot and HotAndMirrored.

Usage Considerations
Client must use failover mode to determine required actions to take when Server fails.


Conformance Testing

Client Server

Failover for this type of redundancy requires the Client to monitor Server status and to switch to a backup Server if it detects a failure. The failover method tells the Client what it must do when connecting to a Server and when a failure occurs. Cold redundancy requires a Client to reconnect to a backup Server after the initial Server has failed. Warm redundancy allows a Client to connect to multiple Servers, but only one Server will be providing values. In hot redundancy multiple Servers are able to provide data and a Client can connect to multiple Servers for the data.

The Server shall expose the methods of failover it supports (cold, warm or hot).
Non-transparent redundancy