Parallel file operations

[Holde]

I have 2 folders on different disks. And was testing parallel operations.
I set
disk 1 to 10 parallel operations
disk 2 to 50 parallel operations
For comparing 50 (starts with 60 - reading disk 1 is very fast) threads are used. This is what you wrote in the help.
But i do not understand why it shows 50 threads while synchronising.
Shouldn't it be 10?
Or how can I persuade FreeFileSync to use 50 parallel operations for comparing and only 10 for copying files for disk 2.

[Plerry]

> But i do not understand why it shows 50 threads while synchronising.
> Shouldn't it be 10?
Per the FFS Manual page on Performance:

• When synchronizing a folder pair, FreeFileSync will use the maximum of the number of parallel operations supported by the two folders.

So, your 50 parallel threads during synchronizing is in line with the manual page.

> how can I persuade FreeFileSync to use 50 parallel operations for comparing
> and only 10 for copying files for disk 2.
I don't think you can.

[Holde]

But then I do not get it.
Why do I set 2 different values if FFS is using always the highest of the two?
I can only optimize comparison?
But this backfires if the files which I have to synchronise are large. (I assume this because of the shown transfer rate)

In the above example. I could set for disc 1 also only 1 parallel operations or 5. Same result since disc 1 is local and disc 2 is a remote disc which I access via VPN.

Time for comparison (about one million files), parallel operations on disc 2:
1x 39:47 min
3x 16:02 min
5x 8:54 min
10x 5:36 min
20x 3:59 min
30x 3:31 min
40x 3:17 min
50x 3:09 min

So I thought 50x would be fine. But I believe that it is much too high for synchronizing.