Block Level FTP File Sync

Normally, when a file is changed, whole file will be synchronized. Even if you just added a single byte. It's a total waste of time and bandwidth.

Block Level Sync only copies changed part, not whole file. It will improve sync performance significantly.

When a file is changed, whole file will be synchronized even if source file changed a single byte. It's a total waste of time and bandwidth!

Only changed part will be synchronized. You can imagine how much time and bandwidth you can save for 100 MB files, 1 GB files.

How can I know whether it actually works?

Except that you can feel sync process completes much faster, you can also see different info in log file:

        12/29/2013 10:35:34 PM [Update Local File] [OK]	d:\temp\arrow_xxx\AdobeAIRInstaller.exe (Block level transfer copied 138 KB of 17.2 MB)
    

We also did several tests so you can know how fast it can be:

FTP Synchronizer and server is connected via Wifi, speed limits to 500KB/second
Local and remote files are same, then we added a single byte at beginning of each local files

File Size	Block-Level Sync Disabled	Block-Level Sync Enabled	Time saved
10MB	23 seconds	3 seconds	87%
50MB	115 seconds	9 seconds	92%
100MB	228 seconds	21 seconds	91%

There are two things you need to do:

Make sure you installed the latest version of FTP Synchronizer. This feature is only available in v6 and newer.
Replace your current FTP server software with our Rock FTP Server. RockFTP server is a full-featured FTP server software with block-level transfer supported. If you don't want to abandon your current server software, you can let Rock FTP Server listen on a different port so they can work together.

and enjoy wonderful block-level sync feature right now?

Block level sync only works when a file is larger than 10KB
Rock FTP server is a standard FTP server, it also works with other FTP clients.
Rock FTP Server is our product. You can get same level of technical support like FTP Synchronizer (online chat, email, remote support, etc.)