Modify an existing Schema

Modifying a timeseries schema has some drawbacks and it is only possible under some constraints. For this reason is usually better to create a new schema or change the schema name, although this is not always applicable as it leads to data loss.

The contraints are:

• Schema type or options (like the step) cannot be modified
• Up to 3 metrics per schema are supported
• New schema metrics can be added but not removed. Existing ones can be renamed.

Here are the drawbacks:

• InfluxDB: If a schema metric name is changed, the past traffic will be not be displayed anymore in the ntopng charts (RRD is not affected as the metrics are positional)

Warning

After modifying a schema, the schema name must be added to the function ts_utils.getPossiblyChangedSchemas