A data caching method, a node, a machine learning framework and a file system client based on hyper-converged infrastructure are provided. In the data caching method, a computing program requests a computing node to prefetch computing data prior to using the computing data. Then, the computing node acquires and stores the computing data in a cache memory as requested by the computing program. Subsequently, as the computing program requests the computing node to discard the computing data, the computing node discards the computing data from the cache memory as requested by the computing program.