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Logline

Logline is an indexing technology — originally a standalone startup founded by Jason Nochlin — acquired by Grafana Labs and disclosed at GrafanaCON 2026 (2026-04-22). Its role on the wiki is as a secondary indexing layer for Loki, specifically designed for queries over high-cardinality attributes (UUIDs, request IDs, job IDs) whose indexing is intentionally not supported by Loki's base label-based index.

Design thesis

  • High-cardinality over object storage. Unlike Loki's label index (optimised for low-cardinality dimensions like service name and environment), Logline's index structure is explicitly designed for unique-value lookups. It sits on top of the same object-storage substrate Loki already uses, rather than requiring a separate storage tier. (Source: sources/2026-04-22-grafana-grafana-labs-acquires-logline)
  • Additive, not replacement. Grafana Labs' explicit framing is that Logline preserves Loki's core design: the cheap label index remains for the majority of queries, and Logline is invoked specifically for unique-value lookups. This preserves Loki's cost/simplicity envelope.
  • Simpler than classical alternatives (vendor claim). Grafana Labs positions Logline as "much simpler indexing than anything else on the market today" — implicitly contrasting with full-text inverted indexes, whose operational/storage cost scales super-linearly with corpus size. The indexing technique itself is not publicly disclosed in the announcement.

Quoted benchmark

"Early benchmarks being shared this week at GrafanaCON show that a query for a universally unique identifier (UUID) in Loki that previously scanned 3.5 TB of data without returning a result now scans just 8 GB with Logline — a 99.7 % reduction in data scanned."

The telling detail is that the query returns no match in both runs — this is specifically the missing-needle worst case, which is the classic blind spot for label-only log indexes. Benchmark is vendor-reported, single query shape. (Source: sources/2026-04-22-grafana-grafana-labs-acquires-logline)

Origin

Founded by Jason Nochlin, previously CEO of Teleport Data (acquired by Fivetran in May 2021). The acquisition came about via a 2024 industry-event conversation with Logan Smith (Grafana Labs, Senior Director of Corporate Business Development) about Loki's growing pains with high-cardinality queries. Logline's founding insight, per Nochlin: "I started thinking about new ways to do indexing over object storage. It took awhile, but eventually I had a breakthrough."

Rollout

  • Grafana Cloud Logs — limited private preview, 2026-04-22, sales-rep gated.
  • Loki OSS — targeted for the next major Loki release, "in the coming year."

Seen in

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