[almostparallel]

I've got 33TB worth of ISOs to download. I'm getting 500MB/s if there are 10-14 concurrent downloads. The thing is, the decryption is really slow. I know the i/o speeds are not the bottleneck. The queue is full cause of the "Queued for decryption" entries. I just discovered concurrent decryption in the plugin settings, but that doesn't seem to help much too. When decrypting a single file, the increments range from 0.1% to 0.2% at max.

It's running on Ubuntu 20.04 if that helps. Please help. Thanks.

[Jiaz]

Decryption works on 512kb chunks in front of a 1mb read buffer.
What speed do you get?
You can check with iotop -o command
What are your system specs? Source/Destination drive are the same?

[Jiaz]

Also please create a log, see https://support.jdownloader.org/Know...d-session-logs
and post shown logID here

[Jiaz]

I've increased read chunk size to 2mb with next update, please check if it improves the speed

[raztoki]

maybe variable based on raw filesize?

[Jiaz]

@raztoki: more about available memory/max heap size. larger chunks only require more memory