Typical SABnzbd download speeds

[sander]

Maybe nice to share some download speeds SAB can achieve:

Laptop with i3 Core, Ubuntu, wired connection, 300/300 Mbps FttH connection: "Downloaded in 5 minutes 8 seconds at an average of 25.6 MB/s" (to get this info: click on the finished download to open the defails page)

Max speed according to sabnzbd.log:
$ grep -i bps ~/.sabnzbd/logs/sabnzbd.log | cut -c26- | sort -u | tail -1
DEBUG::[bpsmeter:253] bps: 33170626.812

So 33 MB/s in peaks

[CoDeX2k]

Hi sander,

perfect topic. because i wanted to open a topic on this particular problem some days ago.

I got a FttH connection 1 GBit / 1 GBit... and if I run speedtest.net tests I get 935 MBit / 935 MBit. Also if I do HTTP downloads with good download clients I get around 112 - 115 MByte / Sec. But the max I got sofar from sabnzbd on giganews was 35 MByte / Sec on SSL.

Any advice?

Thanks
CoDeX2k

[sander]

The thread subject is "typical" not "max" speeds ... ;-)

In my experience the speed is based on:
- CPU & RAM
- max Internet line speed
- maximum combined speed of your newsserver(s)
- cache size (which I had set to 500 MB)

So two remarks for you:
- which CPU are you using?
- have you tried NZBget (version 9.0 or higher): if your CPU / RAM is the bottleneck, nzbget can achieve higher speeds than SABnzbd

So far I've not thought of a way to measure whether your CPU (or IO) is the bottleneck in achieving higher speeds.

PS: 1 Gbps ... wow! I thought my 300/300 Mbps line was impressive...

[sander]

I did a new download, and checked the CPU-load: SABnzbd causes a CPU-load of ... 118%

Code: Select all

%Cpu(s): 34,9 us, 12,9 sy,  0,0 ni, 47,5 id,  2,2 wa,  0,0 hi,  2,4 si,  0,0 st
KiB Mem:   3980692 total,  3853168 used,   127524 free,  1228972 buffers
KiB Swap:  4125692 total,   129100 used,  3996592 free,  1331296 cached

  PID USER      PR  NI  VIRT  RES  SHR S  %CPU %MEM    TIME+  COMMAND                                                                          
 7644 sander    20   0 2721m 400m  10m S 118,2 10,3  11:13.18 sabnzbdplus

Screenshot:

[Pepi]

You should move to Japan:
http://fareastgizmos.com/computing/sony ... -japan.php
LOL!

Or maybe Sweden: http://www.thelocal.se/20070712/7869

[brando56894]

I just noticed that the amount of items that you have in your queue directly affects your download speeds. I was getting pissed off because I was getting speeds of 200 KB/sec to 2 MB/sec on my NAS, when I would get 6.8 MB/sec on my PC. After some reading and limiting my connections down to 1 it didn't help. I had the idea of just trying to download one item but I had about 350 NZBs in my queue and didn't want to delete them all but couldn't stop all just one so I ended up deleting all but one and boom my speeds stayed at 2 MB/sec, I increased the connections from 1 to 15 and BOOM 6.8 MB/sec!

[shypike]

There's a known problem with very large queues and low memory systems.
Solving this takes a substantive redesign of the queue, so it will not be solved soon.

[RXP]

I've got a 120mbit primary, 38mbit secondary.

I've setup my router to utilise both connections for downloading Usenet by setting up two servers in Sab, one over port 119 and the other over port 543. In my router I've tunnelled the relevant ports across one WAN interface each. It uses multiple usenet servers.

So using both I get between 15-17 Mega bytes a sec on a Microserver N54L. Therotically this should be 20Mbit/sec. I have found that fast downloading does utilise a lot of CPU, I'm sure NZBGet would be quicker as it's been designed to run on embeded systems.

What I have found frustrating is that Supernews has low speeds on very old articles - 2Mbit/sec. So when you have a huge queue it would be nice if Sab could understand that and simultaneously download another newer NZB to maximise throughput. You can of course simulate this by using the forced priority, but that's manual.

[charlenebaker]

hmmm I might consider that japan suggestion. Lol.

casino spiele ohne anmeldung

[stomp]

I got a 1000mbit/100mbit link and was not able to go above 40 MB/s on usenet. I got the same results with NZBGet, maybe marginally better. I'm starting to think that there's no usenet provider atm who can saturate a Gbit link. The problem might be routing, as I'm in Europe but not in the NL (and most if not all european usenet providers are based in the NL).

I'm planning to upgrade my computer soon and run some tests on my network as I observe strange behaviour locally. I'll update this thread if I can improve my speeds.

[sander]

I got a 1000mbit/100mbit link and was not able to go above 40 MB/s on usenet.

40 MB/s usenet download speed, so about 400 Mbps at network layer. ... Impressive! With SABnzbd? How many different newsservers, and how many connections per newsserver?

[stomp]

I'm currently using Newshosting with 30 connections. I tried many usenet providers and many server combinations wthout being able to best Newshosting. In my experience, using multiple usenet providers at the same time decreases speeds. Atm I don't know why. But I observe strange things looking at the connections panel. Don't know if it's SAB, hardware or ISP related. Furthermore, speeds decrease when SAB's processing. So I suspect a hardware bottleneck despite working with SSD RAID0.

Please share you're experiences so we'll eventually reach max speeds. Tips : disable SSL.