RE: [LARTC] exploring HTB

["Sumit Pandya" <sumit@elitecore.com>]

-----Original Message-----
From: Martin Devera [mailto:devik@cdi.cz]

>> 3> A Small but nice document about Cross device sharing on link
>> http://luxik.cdi.cz/~devik/qos/htb/htbmeas1.htm. Can?t this limitation of
>> slot be increased?

> the slots was removed from latest code and link above is obsolete (where
> you have found it ?) ;)
	I can still find this link despite of refreshing page in my browser, May
some cache server running in between.

>The IMQ device is superior for Cross device sharing and it is a LOT simpler
;)
> See http://luxik.cdi.cz/~devik/qos/
	COOL IMQ. How much throughput will be reduced or latency will be added
while using IMQ? As in every flow it adds/increase one hope internally?

>> 4> It would be nice if someone help me by providing statistics over
number
>> of queues and filter. What is maximum limit of these two for a PIII 700
with
>> 256 MB RAM? How much maximum bandwidth can be shaped?

> I've tried on my pII 375, I was able to shape 100Mbit with 5 classes (3
> leaves). But both CBQ and HTB has O(N) worst case complexity where N is
> no of classes. I just finished new HTB design (with the same interface
> of course) and it should be faster in this way.
> The I will do some serious testing on ratw vs. no of classes.

> Just to note that speed depends ONLY on number of ACTIVE classes (active
> flows). Those without data enqueued are idle and don't decrease
> throughtput.
	Presently I'm running setup with 200 queues (200 RED leaves and 200 u32
classifiers), Thus basically a seperate queue for every individual in my
organization. Ya I never knew about the dependency of throughput on active
flows. I'm planing to go for 400 queues. Sometime before Documentations on
Devik's home page stat that RED is not going to work with HTB and will
simply eat CPU cycles. I couldn't locate it now anywhere? Does it works with
new release of HTB?

> Also limiting is packet rate not byte rate .. The limit is somewhere
> at 30000 packets per second for both CBQ and HTB with 5 classes which
> is cca 500Mbit for 1.5k packets (on my PII).
	But ultimately its going to limit on byte transfer, isn't it?

-- Sumit

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