Issue 11051: Clarify GAP usage                                                                                                                                                                                       (dds-interop-ftf)
Source: Real-Time Innovations (Mr. Kenneth Brophy, ken@rti.com ken.brophy@rti.com)
Nature: Uncategorized Issue
Severity: 
Summary: Source:
Real-Time Innovations, Inc. (Ken Brophy, ken@rti.com)
Summary:
Clarify that GAPs should be used only when a sample is not meaningful and not sent in the first place (e.g. filtered out).
Resolution:
Clarify GAP usage.  

Revised Text:
Revise 8.3.7.4.5:

The RTPS Writer sends the Gap message to the RTPS Reader to communicate that certain sequence numbers are no longer relevant.  This is typically caused by the KEEP_LAST setting of the History QoS on the corresponding DDS DataWriter.  This is typically caused by Writer-side filtering of the sample (content-filtered topics, time-based filtering).  In this scenario, new data-values may replace the old values of the data-objects that were represented by the sequence numbers that appear as irrelevant in the GAP.

Resolution: see above
Revised Text: Revised Text:
Revise 8.3.7.4.5:

The RTPS Writer sends the Gap message to the RTPS Reader to communicate that certain sequence numbers are no longer relevant.  This is typically caused by the KEEP_LAST setting of the History QoS on the corresponding DDS DataWriter.  This is typically caused by Writer-side filtering of the sample (content-filtered topics, time-based filtering).  In this scenario, new data-values may replace the old values of the data-objects that were represented by the sequence numbers that appear as irrelevant in the GAP.

Actions taken:
May 23, 2007: received issue
November 7, 2007: closed issue
Discussion: 
Resolution:
Clarify GAP usage.  

End of Annotations:=====
s is issue # 11051

Clarify GAP usage

Source:
Real-Time Innovations, Inc. (Ken Brophy, ken@rti.com)
Summary:
Clarify that GAPs should be used only when a sample is not meaningful and not sent in the first place (e.g. filtered out).
Resolution:
Clarify GAP usage.  

Revised Text:
Revise 8.3.7.4.5:

The RTPS Writer sends the Gap message to the RTPS Reader to communicate that certain sequence numbers are no longer relevant.  This is typically caused by the KEEP_LAST setting of the History QoS on the corresponding DDS DataWriter.  This is typically caused by Writer-side filtering of the sample (content-filtered topics, time-based filtering).  In this scenario, new data-values may replace the old values of the data-objects that were represented by the sequence numbers that appear as irrelevant in the GAP.