Line Protocol Bulk Import

Import InfluxDB Line Protocol files into Arc. Enables one-command migration from InfluxDB by uploading .lp or .txt files (plain or gzip-compressed).

Endpoint

POST /api/v1/import/lp

Headers

Query parameters

Basic example

curl -X POST "http://localhost:8000/api/v1/import/lp" \
  -H "Authorization: Bearer $ARC_TOKEN" \
  -H "X-Arc-Database: mydb" \
  -F "file=@export.lp"

Example with precision

# Import LP file with second-precision timestamps
curl -X POST "http://localhost:8000/api/v1/import/lp?precision=s" \
  -H "Authorization: Bearer $ARC_TOKEN" \
  -H "X-Arc-Database: mydb" \
  -F "file=@export_seconds.lp"

Response

{
  "status": "ok",
  "result": {
    "database": "mydb",
    "measurements": ["cpu", "mem", "disk"],
    "rows_imported": 150000,
    "precision": "ns",
    "duration_ms": 342
  }
}

InfluxDB migration

Export from InfluxDB and import directly into Arc. For InfluxDB 1.x, use influx_inspect export (the influx CLI does not support Line Protocol output):

# Export from InfluxDB 1.x (reads TSM and WAL directly)
influx_inspect export \
  -datadir /var/lib/influxdb/data \
  -waldir /var/lib/influxdb/wal \
  -database mydb -lponly -out export.lp

# Import to Arc
curl -X POST "http://localhost:8000/api/v1/import/lp" \
  -H "X-Arc-Database: mydb" \
  -H "Authorization: Bearer $ARC_TOKEN" \
  -F "file=@export.lp"

How it works

Data flows through Arc's high-performance columnar ingest pipeline (ArrowBuffer -> ArrowWriter -> Parquet -> storage) -- the same path used by streaming LP ingestion. This means bulk imports benefit from the same throughput, sort optimization, and hourly partitioning.

Notes

• Multi-measurement -- a single LP file can contain multiple measurements; all are imported in one request.
• Precision-aware -- timestamps are losslessly converted from the specified precision to Arc's internal microsecond format.
• Gzip support -- compressed files (.lp.gz) are automatically detected and decompressed via magic bytes.
• RBAC -- write permissions are checked for every measurement in the file.
• Maximum file size: 500 MB (after decompression).

Error responses