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The emerging memory technologies,such as phase change memory (PCM),provide chances for high-performance storage of I/O-intensive applications.However,traditional software stack and hardware architecture need to be optimized to enhance I/O efficiency.In addition,narrowing the distance between computation and storage reduces the number of I/O requests and has become a popular research direction.This paper presents a novel PCM-based storage system.It consists of the in-storage processing enabled file system (ISPFS) and the configurable parallel computation fabric in storage,which is called an in-storage processing (ISP) engine.On one hand,ISPFS takes full advantage of non-volatile memory (NVM)’s characteristics,and reduces software overhead and data copies to provide low-latency high-performance random access.On the other hand,ISPFS passes ISP instructions through a command file and invokes the ISP engine to deal with I/O-intensive tasks.Extensive experiments are performed on the prototype system.The results indicate that ISPFS achieves 2 to 10 times throughput compared to EXT4.Our ISP solution also reduces the number of I/O requests by 97％ and is 19 times more efficient than software implementation for I/O-intensive applications.