The invention provides a writing-in method for storage data in a storage
system, which comprises the following steps: a user-mode
file system receives a writing-in request;
processing the storage dataaccording to the writing-in request, and constructing
metadata corresponding to the storage data; and writing the storage data and
metadata in a nonvolatile memory. By establishing the user-mode filesystem, the distributed storage
system does not need to convert the user mode to a kernel mode when reading local storage data, avoids a large number of I / O operations when the user mode is convertedto the kernel mode, and simplifies the I / O process. Moreover, in the process of writing in data, the
metadata corresponding to the data is constructed by the user-mode
file system, which facilitatesthe access of metadata, improves the performance utilization of the non-
volatile memory, and thus improves the overall data reading and writing performance of the storage
system. The present application also provides a writing-in system for storage data in a storage system, a computer-readable storage medium and a
server having the above-mentioned beneficial effects.