----- Original Message ----- From: "Mihai Vlad" <mihaivlad@xxxxxxxxxxxxxxx> To: <lartc@xxxxxxxxxxxxxxx> Sent: Monday, March 29, 2004 9:55 AM Subject: RE: R2Q and more Thanks for your answers! I played with some values and I might add something. Please tell me if I am wrong. Overruling the QUANTUM parameter in a LEAF class makes the RATE parameter useless. From my opinion QUANTUM is the parameter that is the most relevant. e.g. CLASS A - RATE 64kbit - QUANTUM 1500 CLASS B - RATE 8kbit - QUANTUM 3000 Class B gets twice the bandwidth that CLASS A receives. RATE is useless in this case. So you might establish some sort of a rule that the ratio of QUANTUMS equals the ratio of the (real) RATEs of 2 LEAF CLASSES. BUT that is also wrong if the ratio is bigger that 2-3. e.g. CLASS A QUANTUM 1500 CLASS B QUANTUM 6000 You would expect CLASS B to get 4 times the bandwidth that CLASS A gets. But in fact ... the Ratio is somewhere around 2.8-3.0. (These tests were made on a 256 kilobit bandwidth). ---------------------------------------------------------------------------- >>>>>>>>>>>>>>>>>>>>>>>> I did not tested this so precisely, but sounds strange that ratio is limited to 3. I agree that it is very important to set the RATE of the parent CLASS below the value of the bandwidth. In my case - for a 256kbit bandwidth from my ISP, 240kbit RATE works excellent >>>>>>>>>>>>>>>> Mostly you must set ceil, to 240 , of course for root, rate=ceil anyway. ---------------------------------------------------------------------------- There is still a problem remained unsolved for me. (My connection works excellent after 6.00 PM until 10.00 AM. During the day my ISP establishes some '"'rules'"' in which the connection is shared among some clients.) You cannot tell the exact value of the bandwidth during the day. It is very bursty. You might download with 240kbit for 1 minute and after that the bandwidth might get to 64kbit, etc... So I do not have a '"'standard'"' connection. Is it possible to split that '"'bursty'"' bandwidth (as unpredictable as it is) among my friends in my LAN? I use esfq. Is there a way that HTB can auto-sense the parameters of the bandwidth and reconfigure itself? I know that sounds real funny, but for me it would be a dream to have such a traffic shaper. I do not have enough money to buy a straight 256kbit connection :( >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> htb cant sense anything, I made some atempts to do something about that, but results are not very good. without limiting trafic to 90% of your maximum it is not possible to do anything. because of the way how all network works. so you need to measure your link capacity somehow. also it would ne nice to know the rules that your isp use to divide trafic I am working on such software which will mesure trafic and queue length at your isp according to ping times. ( I recently bought 2 times more trafic, and now do not need it so much as before Now I mostly care about latency, I need to make ping lower that 200ms at all times even under full load) I did not made it available for public right now, because it is only start of developnemt Unfortunately this consumes some trafic and responds slowly, but looks better that nothing. If you have very low speed, the you will need to do very carefull traffic prioritization. As I noticed it is realy hard to control speed of about 1kbyte/s which is nearly equal to quantum per sek also I wrote alternative tc tutorial, which you can find on my page http://pupa.da.ru/imq/ _______________________________________________ LARTC mailing list / LARTC@xxxxxxxxxxxxxxx http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/
