Hi, whats the best setting(s) to use to keep the data stream low between the client and server on backup for both files and images? with regards checking if it has that data / file already.
Many Thanks
Thats what Incremental backups are, vs Full Backups.
Incremental backups are supposed to upload only files that have been added / changed. Full backups backup everything reguardless of whats already backed up.
How does it know what to NOT backup? is it maintaining an internal database on the client of changes (i assume not, as thats what the CBT does?), so whats it sending to the server to figure out what has changed to backup?
when you start a file backup, you will see it go through an indexing phase before the files are sent to the server
I belive this is where it collects and compares to the server what files need to be sent.
Then when i watch the status
We can see its only sending 30mb of data
looking at the log we can see
| 2026-05-01 11:59 | INFO | Starting unscheduled incremental file backup… |
|---|---|---|
| 2026-05-01 11:59 | DEBUG | DX1337: Connecting for filelist… |
| 2026-05-01 11:59 | DEBUG | DX1337: Waiting for filelist |
| 2026-05-01 11:59 | DEBUG | DX1337: Connecting for filelist (async)… |
| 2026-05-01 12:00 | INFO | |
| 2026-05-01 12:00 | INFO | Scanning for changed hard links on volume of “M:\”… |
| 2026-05-01 12:00 | INFO | Indexing of “M” done. 1 filesystem lookups 71593 db lookups and 1 db updates |
| 2026-05-01 12:00 | INFO | Scanning for changed hard links on volume of “D:\”… |
| 2026-05-01 12:00 | INFO | Indexing of “D” done. 2 filesystem lookups 16038 db lookups and 2 db updates |
| 2026-05-01 12:00 | DEBUG | DX1337: Doing backup with hashed transfer… |
| 2026-05-01 12:00 | INFO | DX1337: Loading file list… |
| 2026-05-01 12:00 | DEBUG | DX1337 Starting incremental backup… |
| 2026-05-01 12:00 | INFO | DX1337: Calculating file tree differences… |
| 2026-05-01 12:00 | INFO | DX1337: Calculating tree difference size… |
| 2026-05-01 12:00 | INFO | DX1337: Linking unchanged and loading new files… |
We can see there is a compare going on so the client knows what to send over to the server
I had seen this, my question is aimed at this setting under Advanced
“Local/passive incremental file backup transfer mode:” there are a few settings here,
Also “Beta: Calculate file hashes on client in parallel as Internet/active client:“
Both of the above i would think inpact the amount of data sent…
Only the first one. The default is already best there for Internet clients.