SUM

Sums the values of a specified property across all matching events.

Step-by-Step Setup when creating a SUM-based metered feature:

1. Navigate to Features

   • Go to Product Catalog → Features
   • Click “Add Feature”

2. Basic Information

   • Name: “Data Transfer” (or descriptive name)
   • Type: Select “Metered”

3. Event Configuration

   • Event Name: data.transfer (must match your event data)
   • Aggregation Function: Sum
   • Aggregation Field: gb (the property to sum)

4. Usage Settings

   • Usage Reset: Periodic (for monthly limits) or Cumulative
   • Unit Name: GB / GBs

5. Save Feature

Calculation Example

Event Data

[
  {
    "event_id": "evt_001",
    "event_name": "data.transfer",
    "external_customer_id": "customer_123",
    "timestamp": "2024-01-15T10:00:00Z",
    "properties": {
      "gb": 5.2
    }
  },
  {
    "event_id": "evt_002", 
    "event_name": "data.transfer",
    "external_customer_id": "customer_123",
    "timestamp": "2024-01-15T10:05:00Z",
    "properties": {
      "gb": 3.8
    }
  },
  {
    "event_id": "evt_001", // Duplicate event ID
    "event_name": "data.transfer",
    "external_customer_id": "customer_123", 
    "timestamp": "2024-01-15T10:10:00Z",
    "properties": {
      "gb": 7.1
    }
  }
]

Calculation Process

1. Event Matching: All events with event_name = "data.transfer"
2. Deduplication: Remove duplicate event IDs, keeping latest value
   • evt_001 → 7.1 GB (latest value for this ID)
   • evt_002 → 3.8 GB
3. Sum Result: 7.1 + 3.8 = 10.9 GB

Result: 10.9 GBs

Use Cases

Data Transfer Tracking

Perfect for: Bandwidth usage, file downloads, API data transfer

{
  "event_name": "data.transfer",
  "external_customer_id": "acme_corp",
  "properties": {
    "gb": 2.5
  }
}

Compute Time

Perfect for: CPU hours, GPU usage, processing time

{
  "event_name": "compute.usage",
  "external_customer_id": "user_456",
  "properties": {
    "hours": 1.5
  }
}

Storage Usage

Perfect for: Disk space, database storage, file storage

{
  "event_name": "storage.usage",
  "external_customer_id": "merchant_789",
  "properties": {
    "mb": 512
  }
}

Credits Consumed

Perfect for: AI model usage, API credits, processing credits

{
  "event_name": "model.usage",
  "external_customer_id": "customer_101",
  "properties": {
    "credits": 25
  }
}

When to Use SUM

✅ Use SUM when:

• Tracking quantities or volumes
• Measuring resource consumption
• Accumulating usage values
• Need precise numeric totals

Next Steps

• Creating a Metered Feature - Complete setup guide
• Sending Events - How to transmit SUM events