Can't reach maximum speed with SABNZBD

[RobinM]

Hi there,

Since 1 week i upgraded my internet connection from 100 to 600mb.

With my 100mb connection i could reach maximum speed, but since i upgraded my connection sabnzbd maxes out around 150mb.

I tested after that with NZBGET, with NZBGET i reached around 600mb.

Is it possible to config sabnzbd so it will reach same speed.

Using an intel i5 2300 processor and have 12gb of ram installed.

Cache limit is set to 1000M

CAn anyone help me out, or is sabnzbd not designed to reach such speeds?

[sander]

Interesting ... as in: what's the maximum speed SABnzbd can achieve?


If you have SSL turned on for your newsserver, turn it off, and check the speed again.

Otherwise I assume all test conditions are the same: same newsserver, same number of connections, etc.

[RobinM]

With or without SSL didnt make any differnce, i'm not sure if sabnzb is desigend for such speeds. To bad because i really like the program

[shypike]

i'm not sure if sabnzb is desigend for such speeds.

Probably not, but I haven't been in a position to test it.

[RobinM]

i can provide a test environment if wanted, let me know:)

[shypike]

You have already tested and shown what the maximum speed is
Maybe you can experiment a bit with the amount of connections (increase).
Also make sure you have a sizeable article cache in Config->General.

[RobinM]

Tested it with 20 till 50 connections, didnt make much difference. My cache limit is 1000M, so this should be more then enough. Witn nzbget i reached maximum speed without any further config.

[shypike]

Yeah, C++ versus Python.

[jcfp]

iirc there's a throttling mechanism in sab that you may hit at very high speed, based on a maximum size of an (internal) article decoding queue. And then there's the inefficiencies of the python interpreter...

[sander]

And then there's the inefficiencies of the python interpreter...

Would you see that by a high / 100% CPU load?

[RobinM]

in my case my cpu is not maxed out.

SAB max speed seems to be around 16-17megabyte per second. Smaller files have reached higher speeds (1gb):

Finished at 2013-01-18 13:53:07
Downloaded 4.2 GB

Results of the job:

Stage Download
Downloaded in 4 minutes 6 seconds at an average of 17.6 MB/s

Finished at 2013-01-16 13:04:40
Downloaded 7.2 GB

Results of the job:

Stage Download
Downloaded in 7 minutes 7 seconds at an average of 17.3 MB/s

Results of the job:

Stage Download
Downloaded in 9 minutes 36 seconds at an average of 16.9 MB/s
12 articles were missing

Finished at 2013-01-18 05:58:49
Downloaded 800 MB

Results of the job:

Stage Download
Downloaded in 30 seconds at an average of 26.1 MB/s

Finished at 2013-01-17 08:00:08
Downloaded 1.1 GB

Results of the job:

Stage Download
Downloaded in 43 seconds at an average of 25.6 MB/s