What's Block-Level transfer?
When you upload file to other FTP servers, the whole file will be uploaded. Even if you just added a single byte to this file. As you can image that it's a total waste of time and bandwidth. Block Level transfer work in different way, it only copies changed part, not the whole file. It will improve the transfer performance significantly.
When a file is changed, the whole file will be uploaded or downloaded even if the source file changed a single byte. It's a total waste of time and bandwidth!
Only changed part will be transferred. You can image that how much time and bandwidth you can save for 100 MB files, 1 GB files.
We did several tests so you can know how fast it can be:
|Block-Level transfer Disabled||Block-Level transfer Enabled||Time saved|
|10MB||23 seconds||3 seconds||87%|
|50MB||115 seconds||9 seconds||92%|
|100MB||228 seconds||21 seconds||91%|