Overview
Delta Compression is a byte replication technology that enables block/byte level synchronization for a file collaboration session. Through the use of this feature FolderMaestro will be able to transmit only the bytes/blocks of a file that have changed instead of transferring the entire file. This results in much lower network bandwidth utilization which can be an enormous benefit if you are transferring files across a slow WAN or VPN, as well as a high volume LAN.
You enable Delta compression on a per file collaboration session basis, and it generally affects all files in the Watch Set. You will only benefit from delta compression for files that don't change much between file modifications, which includes most document editing programs.
Below are a list of general fields and their descriptions:
Enable Block/Byte Synchronization |
Enables delta encoded file transfers which only sends the file blocks that are different between source and target(s). If this is disabled, the standard file copy method will be used to synchronize files. |
Disable on Session Startup |
Disables delta compression during file collaboration session startup where the state of all hosts and files is not known. If enabled, delta encoding would need to be performed between source and each target separately since the state of any files is not known. |
Checksum Transfer Size (KB) |
The block size in Kilobytes used to transfer checksums from target to source at one time. Larger sizes will result in faster checksum transfer, but will consume more memory in agents. |
Delta Block Transfer Size (KB) |
The block size in Kilobytes used to transfer delta encoded data from target to source at one time. Larger sizes will result in faster overall file transfers, but will consume more memory in agents. |
Minimum File Size (KB) |
Minimum size of files in Kilobytes to perform delta encoding for. If file is less than this size then delta encoding will not be performed. |
Minimum File Size Percentage Target / Source |
The minimum allowed file size difference between source and target, as a percentage, to perform delta encoding. If the target file size is less than this percentage of the source file size then delta encoding will not be performed. |
Excluded File Extensions |
List of comma separated wildcard patterns of file extensions to be excluded from delta encoding, e.g. zip,jpg,png. If a file extension matches any of these patterns then it will be excluded from delta. In general, compressed files should be excluded from delta encoding and the most popular compressed file formats are excluded by default. |
Excluded File Name Wildcard Patterns |
A list of file name wildcard patterns to exclude from delta encoding. If a filename matches any wild card pattern in this list then it will be excluded from delta encoding transfers and a regular file transfer will be performed. See the File Filters: wildcard expressions section for more information on specifying wildcard expressions. |