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removed formateoverview section (#13994)
docs: Remove outdated information about remote-read API --------- Signed-off-by: kushagra Shukla <kushalshukla110@gmail.com> Signed-off-by: Kushal shukla <85934954+kushalShukla-web@users.noreply.github.com> Signed-off-by: Arthur Silva Sens <arthur.sens@coralogix.com> Co-authored-by: Arthur Silva Sens <arthur.sens@coralogix.com>
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# Remote Read API
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This is not currently considered part of the stable API and is subject to change
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even between non-major version releases of Prometheus.
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## Format overview
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The API response format is JSON. Every successful API request returns a `2xx`
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status code.
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Invalid requests that reach the API handlers return a JSON error object
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and one of the following HTTP response codes:
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- `400 Bad Request` when parameters are missing or incorrect.
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- `422 Unprocessable Entity` when an expression can't be executed
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([RFC4918](https://tools.ietf.org/html/rfc4918#page-78)).
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- `503 Service Unavailable` when queries time out or abort.
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Other non-`2xx` codes may be returned for errors occurring before the API
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endpoint is reached.
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An array of warnings may be returned if there are errors that do
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not inhibit the request execution. All of the data that was successfully
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collected will be returned in the data field.
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The JSON response envelope format is as follows:
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```
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{
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"status": "success" | "error",
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"data": <data>,
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// Only set if status is "error". The data field may still hold
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// additional data.
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"errorType": "<string>",
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"error": "<string>",
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// Only if there were warnings while executing the request.
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// There will still be data in the data field.
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"warnings": ["<string>"]
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}
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```
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Generic placeholders are defined as follows:
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* `<rfc3339 | unix_timestamp>`: Input timestamps may be provided either in
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[RFC3339](https://www.ietf.org/rfc/rfc3339.txt) format or as a Unix timestamp
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in seconds, with optional decimal places for sub-second precision. Output
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timestamps are always represented as Unix timestamps in seconds.
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* `<series_selector>`: Prometheus [time series
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selectors](basics.md#time-series-selectors) like `http_requests_total` or
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`http_requests_total{method=~"(GET|POST)"}` and need to be URL-encoded.
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* `<duration>`: [Prometheus duration strings](basics.md#time_durations).
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For example, `5m` refers to a duration of 5 minutes.
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* `<bool>`: boolean values (strings `true` and `false`).
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Note: Names of query parameters that may be repeated end with `[]`.
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## Remote Read API
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> This is not currently considered part of the stable API and is subject to change even between non-major version releases of Prometheus.
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This API provides data read functionality from Prometheus. This interface expects [snappy](https://github.com/google/snappy) compression.
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The API definition is located [here](https://github.com/prometheus/prometheus/blob/master/prompb/remote.proto).
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These streamed chunks utilize an XOR algorithm inspired by the [Gorilla](http://www.vldb.org/pvldb/vol8/p1816-teller.pdf)
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compression to encode the chunks. However, it provides resolution to the millisecond instead of to the second.
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