Description: File mapping is a technique that allows a file or part of a file to be mapped into the address space of a process, enabling efficient access to files. This technique is based on assigning virtual memory addresses to the data of a file, thus facilitating reading and writing information without the need for traditional input/output (I/O) operations. By mapping a file, the operating system creates a direct link between the file in the file system and the address space of the process, allowing the process to access the file’s data as if it were part of its own memory. This not only improves the speed of data access but also optimizes memory usage, as the operating system can load only the parts of the file that are needed at any given time. Additionally, file mapping allows multiple processes to share the same file in memory, which is especially useful in applications that require concurrent access to data. In summary, file mapping is a fundamental technique in memory management across modern operating systems, providing efficient and flexible access to files.
