fastdfs append_file

FastDFS is an open-source high-performance distributed file system that is designed to store and manage large volumes of files. One of the key features of FastDFS is the ability to append data to an existing file.

The append_file operation in FastDFS allows you to add new data to the end of a file that already exists in the file system. This operation is useful when you need to add new data to a file without having to overwrite the existing data. This is especially useful in scenarios where you are working with large files that are constantly growing, such as log files or media files.

To use the append_file operation in FastDFS, you first need to create a file in the file system using the upload_file operation. Once the file is created, you can use the append_file operation to add new data to the end of the file.

The append_file operation works by first identifying the storage node that currently holds the file. The new data is then sent to this storage node and appended to the end of the file. Once the append operation is complete, the file size and file metadata are updated to reflect the new data.

Overall, the ability to append data to existing files in FastDFS makes it a powerful and flexible distributed file system that can handle a wide range of use cases.