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Guardian
User Guide
Information and resources about the main features of Guardian, and the tasks that you can do from the user interface (UI).
Queries
Queries
You can use the Nozomi Networks Query Language (N2QL) syntax to create complex data processes to obtain, filter, and analyze lists of information from the Nozomi Networks software.
Commands
Link-events-specific commands reference

Guardian
- Introduction
  An overview of Guardian.
- Installation Guide
  Information and resources on how to install Guardian, and the different options and settings that are available.
- Administrator Guide
  Information and resources about the Administration section of Guardian, and the tasks that you can do in this part of the software.
- User Guide
  Information and resources about the main features of Guardian, and the tasks that you can do from the user interface (UI).
  - Sensors
  - Alerts
  - Assets
  - Queries
    - Queries
      You can use the Nozomi Networks Query Language (N2QL) syntax to create complex data processes to obtain, filter, and analyze lists of information from the Nozomi Networks software.
  - Smart Polling
  - Arc
  - Network
  - Process
  - Reports
  - Assertions
  - Time machine
  - Vulnerabilities
  - Administration
  - Personal settings
- Maintenance Guide
  Information about the maintenance tasks of Guardian, to help you administer and maintain the solution in a production environment.
- Print format documentation
  A list of all the print-format documentation that is available for Guardian.

Link-events-specific commands reference


Syntax	`availability`
Parameters
Description	The availability command computes the percentage of time a link is UP. The computation is based on the link events UP and DOWN that are seen for the link.


Syntax	`availability_history <range>`
Parameters	range: the temporal window in milliseconds to use to group the link events
Description	The availability_history command computes the percentage of time a link is UP by grouping the link events into many buckets. Each bucket will include the events of the temporal window specified by the range parameter.


Syntax	`availability_history_month <months_back> <range>`
Parameters	months_back: number of months to go back in regards to the current month to group the link events range: the temporal window in seconds to use to group the link events
Description	The availability_history command computes the percentage of time a link is UP by grouping the link events into many buckets. Each bucket will include the events of the temporal window specified by the range and months parameters.