# Apache Airflow 1.6.0 — Release & Upgrade Intelligence
- **Product:** Apache Airflow (https://airflow.apache.org)
- **Version:** 1.6.0
- **Released:** Nov 13, 2015
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/airflow/updates/1.6.0/

## Executive Summary (TL;DR)
Apache Airflow 1.6.0. Source highlight: [scheduler] the notion of DAG runs allows for more parallelization, and controls around scheduling (max number of running task instance per DAG, max number of DAG runs to be evaluated for scheduling, ...)

## New Features
- UI changes related to new scheduler features

## Bug Fixes
- Tons of bug fixes and incremental improvements