[LARTC] linux/tc vs packetshaper

[Joakim Recht god@cs.auc.dk]

<PRE>
bert hubert wrote:

&gt;<i> 
</I>&gt;<i> Number of users is not that big an issue. We've filtered 90mbit/s of traffic
</I>&gt;<i> with Linux, but we currently only shape up to 5mbit/s. However, the sites we
</I>&gt;<i> filter have &gt;100 http connections per second, which each take a few seconds
</I>&gt;<i> to complete, so I'd guess that at any one time we have ~300 tcp/ip sessions
</I>&gt;<i> running. 
</I>&gt;<i> 
</I>&gt;<i> I bet a 1000 users would not come near to that amount of sessions.
</I>
Well, I've had to increase /proc/sys/net/ipv4/ip_conntrack_max from 16k 
to a larger value on a network with 300 users, so something tells me 
that quite a lot of connections are open.

&gt;<i> 
</I>&gt;<i> Regular shaping might induce more, but it hasn't been a problem for us so
</I>&gt;<i> far. As long as you are not actively shaping (ie, remain below your
</I>&gt;<i> bandwidth ceiling), we don't see *any* additional latency.
</I>
This is the problem for me... The connection is to be distributed 
between some 8 college dorms, and the users here use quite a lot of 
bandwidth right now, as we are connected to a university connection. 
However, we are about to buy our own, which means a pretty crowded 20 
mbit connection, and as each dorm should be guaranteed an amount of 
bandwidth, shaping could occur very often, at least at peak hours in the 
afternoon/evening.

&gt;<i> We've only configured our shaping solution once, using the excellent
</I>&gt;<i> CBQ.init script. Takes little time, and then runs on without any problems.
</I>&gt;<i> 
</I>&gt;<i> Regards,
</I>&gt;<i> 
</I>&gt;<i> bert hubert
</I>&gt;<i> 
</I>Thanks for your reply,

-- 
Joakim Recht
Tlf. 20 85 54 77
Email <A HREF="mailto:god@cs.auc.dk">god@cs.auc.dk</A>
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</PRE>