Advice to avoid congestion

Advice to avoid congestion

Post by J?rgen Persso » Thu, 30 Sep 2004 18:58:53

The network load is usually not a problem. I could live without
the peaks during which the system does not get any useful work

Sar tells me:

            IFACE  rxpck/s    txpck/s     rxbyt/s     txbyt/s
07:50:00 AM eth1  97707.74  192925.26  6911304.56  3958646.13

It is a network backup i.e. there is a lot of heavy disk IO
going on as well. I am looking at that aspect but let us focus
on the network for now.

I found a USENIX paper about NAPI[1]. It would probably help me
but would it really save my day? What are the alternatives? A
multilink trunk would generate as many interrupts, right? Any
other ideas? Traffic shaping?

Linux 2.4.20
Dual PIII 1400MHz
e1000: eth1 NIC Link is Up 100 Mbps Full Duplex

No network related errors worth mentioning.


[1] http://www.*


1. TCP congestion-avoiding slow start mode


Where can I find out more about the TCP protocol and this mode?
Is there a way to know when the slow start is active or inactive during
a transmition? is there a way to force this mode constantly? is there
any other mode?

thanks for any help


Jerome Corre

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