fastdfs append_file

FastDFS is an open-source, high-performance distributed file system that can store and manage large amounts of files. One of the features of FastDFS is the append_file operation, which allows users to append data to an existing file in a FastDFS storage node without overwriting the original file.

The append_file operation works by sending the data to be appended to the FastDFS storage node. The storage node then appends the data to the end of the existing file and returns a success or failure message to the user.

To use the append_file operation in FastDFS, the user needs to have a FastDFS client installed and configured on their system. They also need to have the file they want to append data to already uploaded to a FastDFS storage node.

The syntax for the append_file operation in FastDFS is as follows:

int append_file(const char *file_id, const char *local_filename);

In this syntax, file_id is the unique identifier of the file in FastDFS, and local_filename is the name of the local file containing the data to be appended.

Overall, the append_file operation in FastDFS provides a convenient and efficient way to add data to existing files in a distributed file system.