Meta AI Open-Sources Rebalancer: A C++ Assignment Solver That Runs About 40 Million Placement Problems a Day

תקציר מקורי באנגליתMeta has open-sourced Rebalancer , a C++ library with a Python interface for solving assignment problems. It decides which objects go into which bins under constraints and objectives. According to the Engineering at Meta’s post , Rebalancer has handled resource allocation across Meta for over 9 years. The release ships under Apache 2.0 with documentation , a PyPI package and a debugging UI called Rebalancer Explorer. Is it deployable? Yes. pip install rebalancer installs v1.0.4 for Python 3.12+, with prebuilt wheels for Linux x86-64 and macOS 14+ ARM64. .deb, .rpm and Homebrew packages also exist. PyPI still classifies the project as Alpha. What Problem Does Rebalancer Solve? Assignment problems show up across Meta’s stack. Racks go into datacenters, servers go to services, tas