{"slug": "meta-ai-open-sources-rebalancer-a-c-assignment-solver-that-runs-about-40-million", "title": "Meta AI Open-Sources Rebalancer: A C++ Assignment Solver That Runs About 40 Million Placement Problems a Day", "summary": "Meta has open-sourced Rebalancer, a C++ and Python library it has used for over 9 years to place shards, servers and traffic, handling about 40 million assignment problems a day. The library uses local search or MIP solvers including Gurobi, FICO Xpress and HiGHS, and is pip-installable under the Apache 2.0 license.", "body_md": "Meta has open-sourced Rebalancer, the C++ and Python library it has used for over 9 years to place shards, servers and traffic. It handles about 40 million assignment problems a day, using local search or MIP solvers like Gurobi, FICO Xpress and HiGHS. It is pip-installable under Apache 2.0.\n\nThe post [Meta AI Open-Sources Rebalancer: A C++ Assignment Solver That Runs About 40 Million Placement Problems a Day](https://www.marktechpost.com/2026/10/06/meta-ai-open-sources-rebalancer-a-c-assignment-solver-that-runs-about-40-million-placement-problems-a-day/) appeared first on [MarkTechPost](https://www.marktechpost.com).", "url": "https://wpnews.pro/news/meta-ai-open-sources-rebalancer-a-c-assignment-solver-that-runs-about-40-million", "canonical_source": "https://www.marktechpost.com/2026/10/06/meta-ai-open-sources-rebalancer-a-c-assignment-solver-that-runs-about-40-million-placement-problems-a-day/", "published_at": "2026-10-07 06:29:14+00:00", "updated_at": "2026-10-07 06:48:29.417548+00:00", "lang": "en", "topics": ["ai-infrastructure", "developer-tools", "mlops"], "entities": ["Meta", "Rebalancer", "Gurobi", "FICO Xpress", "HiGHS"], "also_reported_by": [], "alternates": {"html": "https://wpnews.pro/news/meta-ai-open-sources-rebalancer-a-c-assignment-solver-that-runs-about-40-million", "markdown": "https://wpnews.pro/news/meta-ai-open-sources-rebalancer-a-c-assignment-solver-that-runs-about-40-million.md", "text": "https://wpnews.pro/news/meta-ai-open-sources-rebalancer-a-c-assignment-solver-that-runs-about-40-million.txt", "jsonld": "https://wpnews.pro/news/meta-ai-open-sources-rebalancer-a-c-assignment-solver-that-runs-about-40-million.jsonld"}}