Ganglia's core modules provide essential metrics like RAM and CPU load and most of them are implemented for any platform where Ganglia runs. The ganglia-modules-linux project is not constrained by the requirements to support all the Ganglia platforms: these modules are implemented exclusively for Linux users. The implementations are high-performance C code. The exact modules currently included are IO statistics (similar to the statistics from iostat), individual filesystem capacity statistics and per-core CPU metrics.