بچه‌های فنی متا بالاخره دست‌به‌خیر شدن و ابزار Rebalancer رو که بیش از ۹ سال توی زیرساخت‌هاشون برای تخصیص و چینش منابع استفاده می‌کردن، به شکل متن‌باز در اختیار عموم گذاشتن

We're open-sourcing Rebalancer, the assignment-problem solver Meta has used for resource allocation across our infrastructure for over nine years. Given a set of objects and a set of bins, Rebalancer assigns one to the other to optimize your objectives under your constraints, including hardware placement, service and task placement, traffic routing, and more. It separates how a problem is specified from how it's stored, solved, and debugged, with both an optimal MIP solver and a parallelized local search solver. At Meta it solves ~40 million assignment problems a day across 30+ problem formulations. P99 solve time is 12 seconds on a problem with 265k objects and 3.2k bins. 🔗 Read more on our engineering blog: https://engineering.fb.com/2026/09/21/open-source/rebalancer-generic-high-performance-library-assignment-problems/