Speed up Apache Commons FTPClient transfer

Question

I am using Apache Commons FTPClient to upload large files, but the transfer speed is only a fraction of transfer speed using WinSCP via FTP. How can I speed up my transfer?<

Answer 1

It would be better if you use ftp.setbuffersize(0); if you use 0 as your buffersize , it will take as infinite buffer size. obviously ur transaction will get speeded up... I personally experienced it.. all the best... :)

Answer 2

There is a known issued with Java 1.7 and Commons Net 3.2, the bug is https://issues.apache.org/jira/browse/NET-493

If running these versions I'd suggest the upgrade to Commons Net 3.3 as the first step. Apparently 3.4 fixes more performance issues too.

Answer 3

use the outputStream method, and transfer with a buffer.

InputStream inputStream = new FileInputStream(myFile);
OutputStream outputStream = ftpclient.storeFileStream(remoteFile);

byte[] bytesIn = new byte[4096];
int read = 0;

while((read = inputStream.read(bytesIn)) != -1) {
    outputStream.write(bytesIn, 0, read);
}

inputStream.close();
outputStream.close();

Answer 4

Increase the buffer size:

client.setBufferSize(1024000);