InstantSync FTP is a desktop tool for high speed file synchronization, mirroring, replication, and backups over FTP. The underlying smart SyncDB file tracking technology guarantees that only new and changed files are transferred, making it perfect solution for web site updates and remote server backups. The Sync Preview feature displays sync results without actually transferring any files, and helps you to test and fine tune sync task filters and other options.The filtering options let you limit transferred files by file/folder name, size, date, and attributes. InstantSync accelerates file transfers with multithreaded transfer engine and on-the-fly file compression. It also supports automatic retries, reconnects, and resumes for error free file transfers. Extensive logging options with multiple log file rotation schemes are available.

Features at a Glance:
* Folder sync between local/network and FTP server folders
* One-way file synchronization
* One-way file replication
* One-way file move (transfer & delete)
* Two-way file synchronization (bi-directional)
* SyncDB? smart change tracking
* Task Editor for task editing & Sync preview
* Command line software for batch files
* Run scheduled/On demand
* Run as a service
* Multithreaded transfers
* Automatic reconnects, retries, and resumes
* Include/Exclude filtering by name, size, date, attributes
* Use regular expressions in filters
* Email notifications
* Extensive logging with auto-rotate schemes
* Windows Vista? compatible
* Secure Edition adds support for FTPS and SFTP over SSH2

* Folder sync between local/network and FTP server folders
The folders being synchronized can be local folders or reside at a network share (UNC filenames and paths are supported). The other side of the sync set can reside on an FTP server, running any common FTP server software. BatchSync uses standardized FTP protocol commands, so it does not rely on any server side extensions or non-standard features.
* One-way file synchronization
New and changed files are transferred from source to target.
* One-way file replication (mirroring)
New and changed files are transferred from source to target. Any extra files or folders that no longer exist at the source are also deleted at the target. This helps you to manage clutter on the target, making the target an exact replica of the source.
* One-way file move (transfer & delete)
All files in the source folder are transferred to the target, and after 100% successful transfer, they are deleted on the source. In other words, files are moved from the source to the target. If a certain file is not transferred in full, it is not deleted on the source.
* Two-way file synchronization (bi-directional)
New files are transferred in both directions. The file date stamps are used for comparison. BatchSync will adjust server file dates using server time-zone settings for proper time comparisons.
* SyncDB smart change tracking
When synchronizing files over the FTP protocol, file comparison is much more difficult than when doing local file syncs. This is because all of the file dates change when files are transferred, due to FTP protocol limitations. Similarly, text/html/ascii file sizes change when these types of files are transferred, due to file system differences. This raises a problem, as there is no way to directly compare local files to FTP server files, as they all look like they have been changed.
The solution to this problem is SyncDB. The SyncDB feature tracks these changes and allows BatchSync to accurately transfer only those files that have really changed.
Without SyncDB, consider the effect on a large web site, where possibly 10,000 or more html files would be transferred during each sync, since the file dates and sizes would be changed during the transfer. Now thanks to SyncDB smart file tracking, only files that have really changed are transferred, resulting in only a few files being transferred during each sync.

* Run scheduled/On demand
BatchSync is distributed with two executables: Command line sync and Sync with GUI, called Task Editor. Command line sync software is used to run scheduled sync tasks, and it can also be used to run tasks via batch files, or directly from other software.
* Run as a service
Sync tasks are scheduled using the standard Windows task scheduler. This allows you to run sync tasks as a service, when nobody is logged onto the computer. You can also use other task scheduler software, like Microsoft SQL Executive Task Manager for automating the task execution.
* Task Editor software with Sync Preview
The Task Editor is an easy to use tool for creating, editing, and running the sync tasks. It also has a sync preview feature, which displays sync results without actually transferring any files. This preview feature is a great tool for testing and fine-tuning the sync task filters and options.
* Multithreaded transfers
BatchSync supports up to 25 simultaneous browsing and file transfer threads. This will greatly increase the performance of the file synchronization.
* Compression Support
BatchSync accelerates the file transfers with on-the-fly file compression using the MODE Z command.
* Include/Exclude filtering
You can specify multiple include and exclude filters for each task. Filters can use file/folder names, file size, date, and attributes, and can utilize regular expressions for powerful control over filters. File name filters can be used within a specific sub folder, set of sub folders, or for all folders.
* Handling of Conflicts
BatchSync can detect conflicts (=file has changed on both source and target) and you can specify the action to take in conflicts, like skipping a file, skip and report, always upload, etc.
* Recursive folders and symbolic links
You have an option to ignore subfolders (no recursion to subfolders) and also ignore symbolic links. Specific folders & symbolic links can also be excluded with filters.
* Automatic reconnects, retries, and resumes
The number of reconnects, retries, and timeouts can be specified individually for each task. You can also use unlimited retries. Software will automatically continue (=resume) the transfer at the exact point of failure, rather than starting from the beginning of the file each time. When reaching the maximum limit for retries, you can be notified via log files and email notifications (more below).
* Email notifications
Each task can be set up to send emails on successful and/or failed syncs. You can specify multiple recipients for the notifications. Emails are sent using the standard SMTP server protocol.
* Extensive logging with auto-rotate schemes
You can generate up to four different log files for each run of the sync task. The log files are: Transfer history log (a shared summary log file for all sync tasks), FTP command log, a log listing the files transferred, and an error log.
* There are various auto-rotation schemes available for log files. As an example, you could set it up so that a log file is rotated when its size reaches 10MB. Or arrange to have a new log file created every day or every week, etc.
Secure Edition adds support for FTPS and SFTP over SSH2
* If you require security for your file synchronization, the BatchSync Secure Edition adds support for the FTPS protocol (also called FTP over SSL and FTP/S) and for the SFTP subsystem over the SSH2 protocol.

The license of this software is Free Trial Software, the price is $69, you can free download and get a free trial.