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QOS Outbound speed

Discussion in 'Tomato Firmware' started by lancethepants, Mar 17, 2011.

  1. lancethepants

    lancethepants Network Guru Member

    OK, I've read Toastman's guide to qos, very informative and helpful. I just wanted to make sure I've calcuated right what my qos outbound speed should be.
    Testing my internet's speed, I average .75 Mbytes/s (megabytes per second) upload. So then following Toastman's guide, I want to put 85% of that as the outbound rate in kbit/s.

    1. .75 X .85 = .6375 Cacullate 85% of average
    2. then caclulate Megabytes/s to kilobits/s = 5222 kbits/s

    Is 5222 kbits/s correct?
     
  2. Black6spdZ

    Black6spdZ Networkin' Nut Member

  3. Toastman

    Toastman Super Moderator Staff Member Member

    No. The average figure is not what we are looking for. My articles are very clear on this:


    For QOS to function correctly at all times, you must use the LOWEST figure that you obtain. Not the average. Otherwise, your calculations are fine. You may experiment with that in future, you may find it better to go even lower than 85%. For an example of what to expect, here on the typical "1Mbps" ADSL uplink, throughput is often 900kbps but drops to under 700 at various times. So I usually set 550kbps.
     
  4. lancethepants

    lancethepants Network Guru Member

    Thanks for the correction Toastman. Playing around with the qos I accidently set the outbound speed to around <10% of my upload speed. I noticed the qos worked really well though, my in game pings were the best possible, but I noticed my upload speeds had been really gimped. I plan on it lowering further from 85% until I find a happy medium. @85% my pings have increased by 20 from their best possible, while downloading steam games to saturate the bandwidth. Even at that it's still very acceptable game play while nearly maxing the downstream. I have seen however that the lower outbound indeed is better.
     

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