FTPS or HTTPS - which is the better way to transfer big files from hundreds of clients to server using Java?

Parameters for evaluation:

- 1000 connections from the client (connection may be slow in some cases)

- Multithreaded upload when connection is good (of the same file, or different files) - Ability to resume an upload from the client

- SSL/TLS support (in case of FTPS and HTTPS)

- Load balancer in front of the server

The client would be written in Java and so requires a Java interface to the FTPS/HTTPS client.

So far, I have taken a loo开发者_如何学编程k at Apache Commons FTPS/HTTP clients, Apache MINA and Apache Camel. There was a comment in SO that Commons FTPS client does not resume uploads - is this really so (the API seems to support it though).

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If you are looking for massive perfs, you should try to write your own protocol on top of SSL (using Apache MINA or Netty or plain NIO)