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IDProjectCategoryView StatusLast Update
000184310000-004: Servicespublic2012-02-09 22:48
ReporterWolfgang Mahnke Assigned ToMatthias Damm  
PrioritynormalSeverityminorReproducibilityalways
Status closedResolutionfixed 
Product Version1.01 
Fixed in Version1.02 
Summary0001843: MonitoredItem queue size for Events
Description

Part 4 currently state (Table 128, MonitoringParameters):
"For event monitored items the value is ignored and the server shall set the supported maximum queue size as revisedQueueSize."

This makes sense when the item is reporting. However, when the item is only sampling and later turned to reporting it might not be a good strategy. Clients might only want to get the latest events (e.g. 100) and not the full queue size for monitored items in the server. In this case the client shall be able to set a resonable queue size. One example is hot redundancy where clients might enable reporting in failover and do not want to get a potential very long stream of events they already had received.

Recomended change discussed in the F2F meeting in Florida, January 2012 is to recomend 0 but allow other values for the queue size as well.

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Fix Due Date

Activities

Matthias Damm

2012-02-02 21:49

developer   ~0003253

Splitted description of queueSize into one part for data monitored items and one for event monitored items.
Changed definition for event minitored items to allow a client to requet a queue size that is revised by the server to a value between the minimum required size and the maximum supported size.

Changed in document version OPC UA Part 4 - Services 1.02.13 Draft.doc

Jim Luth

2012-02-07 17:45

administrator   ~0003258

reviewed and agreed to changes made in the telecon.

Issue History

Date Modified Username Field Change
2012-01-12 20:33 Wolfgang Mahnke New Issue
2012-01-12 20:33 Wolfgang Mahnke Status new => assigned
2012-01-12 20:33 Wolfgang Mahnke Assigned To => Matthias Damm
2012-02-02 21:49 Matthias Damm Status assigned => resolved
2012-02-02 21:49 Matthias Damm Resolution open => fixed
2012-02-02 21:49 Matthias Damm Note Added: 0003253
2012-02-07 17:45 Jim Luth Status resolved => closed
2012-02-07 17:45 Jim Luth Note Added: 0003258
2012-02-09 22:48 Jim Luth Fixed in Version => 1.02