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prometheus/docs/disabled_features.md

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Disabled Features 10

Disabled Features

These features are disabled by default since they are breaking changes or are considered experimental. As their behavior may change in future releases, all feature changes are communicated via the release changelog.

One can enable one or more features using the --enable-feature flag with a single feature or a comma-separated list of features. In future releases, features may be enabled by default.

@ Modifier in PromQL

--enable-feature=promql-at-modifier

The @ modifier lets one specify the evaluation time for instant vector selectors, range vector selectors, and subqueries. More details can be found here.

Negative offset in PromQL

--enable-feature=promql-negative-offset

In contrast to the positive offset modifier, the negative offset modifier lets one shift a vector into the past. An example in which one may want to use a negative offset is reviewing past data and making temporal comparisons with more recent data.

More details can be found here.

## Remote Write Receiver

--enable-feature=remote-write-receiver

The remote write receiver allows Prometheus to accept remote write requests from other Prometheus servers. More details can be found here.