(r2) TRSDeltaMonitoringTaskTroubleshooting < Deployment

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Revision 2 - 2025-03-05 - 12:37:59 - WillChatham

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---+!! TRS Delta Monitoring Task (DMT) Troubleshooting  <img src="https://jazz.net/wiki/pub/Deployment/WebPreferences/todo.png" alt="todo.png" width="50" height="50" align="right"> 
%DKGRAY% Authors: Main.WilliamChatham <br>
Build basis: V7.0.2, V7.0.3 and V7.1.
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The objective of page is to provide an overview of the TRS Delta Monitoring Task (DMT) and also include troubleshooting steps.<br> 

---++ What is the Delta Monitoring Task (DMT):

The DMT purpose is to query for and processes three kinds of change (in this order)
   1 Apply compensating actions.
   1 Process changes in durable log (eg user makes a change to a requirement).
   1 Container recovery.

   * The DMT is executed every 2 seconds (non configurable).
   * The DMT gives Administrators a way to determine how up to date TRS processing is.
   * DMT can be monitored by Administrators in the Tracked Resource Set monoto0ring page which shows the Watermark (How up to date the TRS processing is) : 


---+++ Watermark 
In Log based we have a new concept of the "Watermark”

   * Watermark includes a pair of timestamps [t1, t2)
   * Defines the “currency” of the TRS
      * Everything before t2 in the DB is up-to-date in the TRS (*)
      * TRS status shows the watermark.
      * Its duration, and the lag.

[Screen Print showing Watermark page]

---+++ Compensation actions:

Compensation actions result in changes in the changelog
   * Archive & restore - ExcludedContainers
      * Baseline is excluded As archive/restore
      * Historic baseline is created (since 7.1) – As restore
      * Repair & purge – when a state has been modified (no ExcludedContainer)
   * Applying compensation actions does not alter the watermark interval
      * ExcludedContainer will be added and then removed when compensationfinished
      * Unchanging watermark could be due to compensation actions


---++ DMT Troubleshooting

TBD

---++ DMT Performance
TBD

---++ How to determine what the DMT is processing:

TBD
<br><br>

---+++++!! Related topics: [[DeploymentWebHome][Deployment web home]], [[DeploymentWebHome][Deployment web home]]

---+++++!! External links:          

   * [[https://www.ibm.com][IBM]]

---+++++!! Additional contributors: Main.TWikiUser, Main.TWikiUser

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