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Why will dependent objects not go into paused status automatically when I pause the master object?

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In my network, I use master objects. For example, I have set a Ping sensor as the master object for a device.

When I pause the master sensor either manually or by schedule, I expect that the dependent sensors are paused, too. Why does this not happen?

dependency hierarchy intention master-object object paused-by-dependencies pausing prtg

Created on Oct 25, 2017 12:06:11 PM by  Martina Wittmann [Paessler Support]

Last change on May 22, 2019 11:31:18 AM by  Maike Behnsen [Paessler Support]



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This article applies to PRTG Network Monitor 17.3.34 or later.

How Pausing Works in PRTG

Generally, there are three ways of pausing an object so that it shows a Paused status in PRTG:

  1. By Dependency: If a master object is in a Down status, all dependent objects will be paused.
  2. By Intention: You can intentionally pause an object, either
    • Manually or
    • By schedule.
  3. By Hierarchy: You can pause all master and dependent objects by pausing the object that is higher in the object hierarchy.

The Rules in Short

  • Pausing by dependency works for all objects (as far as there are other objects that depend on them). PRTG applies this type of pausing to dependent objects for you in case their master object is in a Down status.
  • Pausing by intention breaks the rule of pausing by dependency. If you pause a master object either manually or by schedule, only the master object is paused. All dependent sensors will further check their status and display it accordingly.
  • Pausing by hierarchy: If you want to pause all objects at a time without pausing every single one, use the object hierarchy relations and pause by hierarchy.

Illustration and Reasons

We will use a Ping sensor that is set as the master object for a device as an example.

1. Pausing by Dependency

If a master object goes into Down status, all other dependent objects will be paused. So, monitoring is paused by dependency.

Reason: Because the master object (here: master Ping sensor) is primarily responsible for the whole device, its error status triggers the information the device is down. That is why all other dependent sensors are paused until the device is up again.

Senors are paused by dependency when the master object is down
Click to enlarge

When the master Ping sensor goes into an Up status again, all other sensors will resume monitoring and show their own states based on the data they retrieve after the re-scan.

If you want to test this, you can simulate an error status with PRTG. It has the same effects. Pausing by dependency works with sensors in a Down (Acknowledged) status as well.

2. Pausing by Intention

You can, of course, pause monitoring intentionally at any time, no matter which sensor status your master object currently has.

To pause an object, you have two options:

  1. Pause manually (for example via the context menu), or
  2. Pause by schedule.

If you pause the master object manually or by schedule, only the master object will be paused, not the other (dependent) sensors on the device. The dependent sensors will show their own status instead.

Reason: If you pause a master object, PRTG gets the information the master object stops monitoring, the other sensors on the device need to take over. Therefore, all other sensors on the device will check their status anew and display it.

Pausing a master object by intention
Click to enlarge

This mechanism is implemented to guarantee maximum monitoring uptime of your network.

3. Pausing by Hierarchy

If you want to pause monitoring for all objects at a time, including master and dependent objects, pause the object that is higher in the object hierarchy.

For example, to pause a master Ping sensor and other dependent sensors at a time, pause the whole device.

Pausing objects by hierarchy
Click to enlarge

More

Created on Oct 25, 2017 1:51:18 PM by  Martina Wittmann [Paessler Support]

Last change on May 22, 2019 11:53:06 AM by  Maike Behnsen [Paessler Support]



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Disclaimer: The information in the Paessler Knowledge Base comes without warranty of any kind. Use at your own risk. Before applying any instructions please exercise proper system administrator housekeeping. You must make sure that a proper backup of all your data is available.