Home > Storage > PowerScale (Isilon) > Product Documentation > Storage (general) > PowerScale OneFS SmartFlash > Cache monitoring and reporting
OneFS provides tools to accurately assess the performance of the various levels of cache at a point in time. These cache statistics can be viewed from the OneFS CLI using the isi_cache_stats command. The command results show statistics for L1, L2, and L3 cache for both data and metadata.
A verbose option of the command, isi_cache_stats -v, provides output that is more detailed and formatted:
Note: For L3 cache, the prefetch statistics will always read zero because L3 cache is a pure eviction cache and does not use data prefetch or metadata prefetch.