gauge_series

Category: Time series
Wire type: gauge_series
Construction: CREATE

Time-series types store timestamped numeric data and derived statistics.

Create a value

Use the top-level CREATE command to initialize this structured value. The example shows its construction options.

amaquet-cli -uri amaquet://127.0.0.1:13378 CREATE '{"key":"example:gauge_series","type":"gauge_series","options":{"labels":{"metric":"cpu"}}}'

Construction options

Example CREATE options: {"labels":{"metric":"cpu"}}. Omitted fields use server defaults.

Supported operations

SET, RANGE, LAST, AGGREGATE, LEN.

See the complete operation contract for exact arguments, defaults, results, and whether a listed GET is the top-level key command or a type-specific OP. It also identifies read-only operations and documents validation, lazy maintenance, and key-version behavior.

Operation payloads

The following examples use the public amaquet-cli JSON command format. Replace example:gauge_series with the key used by your application.

Construction payloads

Use the payload below to initialize this type before issuing reads or type-specific operations.

CREATE

This payload initializes the value and must complete before its type-specific operations are used.

{
  "key": "example:gauge_series",
  "type": "gauge_series",
  "options": {
    "labels": {
      "metric": "cpu"
    }
  }
}

Operations

Each request uses the OP envelope. The response is the type-specific value described in the complete operation contract.

OP SET

Accepts optional timestamp, numeric value and returns true; stores the supplied value.

{
  "key": "example:gauge_series",
  "operation": "SET",
  "args": {
    "timestamp": 1000,
    "value": 42.5
  }
}

OP LAST

Takes no arguments and returns last point or null.

{
  "key": "example:gauge_series",
  "operation": "LAST",
  "args": {}
}

OP RANGE

Accepts optional Unix-millisecond from and to bounds and returns inclusive sorted points.

{
  "key": "example:gauge_series",
  "operation": "RANGE",
  "args": {
    "from": 0,
    "to": 3000
  }
}

OP AGGREGATE

Accepts optional bounds, bucket_ms, and aggregation mode and returns bucket-start/value points.

{
  "key": "example:gauge_series",
  "operation": "AGGREGATE",
  "args": {
    "from": 0,
    "to": 3000,
    "bucket_ms": 1000,
    "aggregation": "avg"
  }
}

OP LEN

Takes no arguments and returns the point count.

{
  "key": "example:gauge_series",
  "operation": "LEN",
  "args": {}
}

Top-level read payload

GET reads the current value without changing it:

{
  "key": "example:gauge_series"
}

Key lifecycle payloads

These commands apply to the key regardless of its registered type:

• TYPE: {"key":"example:gauge_series"} — returns the wire type.
• EXISTS: {"key":"example:gauge_series"} — reports whether the key exists.
• EXPIRE: {"key":"example:gauge_series","ttl_ms":5000} — assigns a five-second TTL.
• TTL: {"key":"example:gauge_series"} — returns the remaining TTL in milliseconds.
• PERSIST: {"key":"example:gauge_series"} — removes the TTL.
• DEL: {"keys":["example:gauge_series"]} — deletes the key.

For defaults, validation, result shapes, and persistence classification, see the complete operation contract.

Key lifecycle

The key participates in TYPE, EXISTS, TTL, EXPIRE, PERSIST, and DEL. Top-level GET returns the type’s direct public value or a synchronized snapshot.