Estimation of the hard disk space

You can open the panel Hard disk space estimation via System Management > Database > Estimation of disk space.

The panel Hard disk space estimation consists of two tabs:

Disk space

The Estimation of disk space tab enables the calculation of the expected storage period based on the available hard disk space.
Figure 1. Estimation of disk space tab
Note: These values are approximate values.

The tab contains the following options:

  • Archive type - select the archive type:
    • NGA PostgreSQL,
    • NGA InfluxDB,
    • NGA MS SQL Server or
    • NGA buffer
  • Archived value changes per seconds - enter the number of values you want to archive
  • Alerts per second - enter the number of alerts you want to archive
  • Available hard disk space - enter your available disc space and the size in gigabytes (GB), terabytes (TB) or petabytes (PB)

Click on the Calculate button to calculate the approximate retention period available.

The estimated storage space per value change/alert is displayed on the right-hand side:
Figure 2. Estimated required disk space per value change / alert

Archive groups

The Archive groups tab allows you to calculate the estimated required disk space for the current archive configuration.

Note: These values are approximate values.
Figure 3. Archive Groups

Alerts per second - enter the number of alerts you want to archive, the Unit and how long values/alerts should be buffered if they cannot be saved when e.g. there is no connection to the database.

Into the table enter:
  • the Retention period for the ALERT and EVENT groups.
  • the number of DPEs
  • the type of data meaning unsolicited or compressed. If you select compressed values, then you must select the interval , e.g. 5 minute, hourly or daily values:
    Figure 4. Select an Interval
  • For an EVENT group you can specify how many value changes you want to have.

    To calculate the estimated required disk space for the current archive configuration, click on the calculator button: . To delete the calculated estimated disk space for the current archive configuration, click the arrow button: .

    The summary of the required storage space is displayed for one day, in total and for the buffer:
    Figure 5. Estimated Disk Space