In this chapter, we learned powerful approaches to a critical aspect of working with files: ensuring that I/O performance is kept as high as is possible, as I/O is really the performance-draining bottleneck in many real-world workloads. These techniques ranged from file access pattern advice passing to the OS, SG-I/O techniques and APIs, memory mapping for file I/O, DIO, AIO, and so on.
The next chapter in the book is a brief look at daemon processes; what they are and how to set them up. Kindly take a look at this chapter here: https://www.packtpub.com/sites/default/files/downloads/Daemon_Processes.pdf.