能否实现单纯的文件传输插件，例如ftp - hdfs

1.因为有这样的需求。尝试自定义插件，使用ByteColumn去传递数据。但是这种情况很容易内存溢出，而且还发现了部分传输之后文件失败的情况，是否应该split针对大文件切分？

2.看到是有streamreader和streamwirter但是没有对应md了 这两种插件是否可以使用流来传输？

Begin with the existing streamreader and streamwirter plugins and inspect how ByteColumn currently carries file data. Clarify whether an FTP-to-HDFS transfer should stream, how large files should be split, and how partial-transfer failures are handled; done means an agreed plugin scope and documented usage.

Written by the indexing model from the issue text.