From: Marco Padovan <evcz@evcz.tk>
To: netfilter@vger.kernel.org
Subject: hashlimit performance (--hashlimit-htable-size value)
Date: Wed, 11 Apr 2012 10:44:39 +0200 [thread overview]
Message-ID: <4F854477.5070701@evcz.tk> (raw)
Hi,
how far can I push --hashlimit-htable-max size?
I did some tests with 262144:
-m hashlimit --hashlimit-mode srcip --hashlimit-name testlimiter
--hashlimit 1/s --hashlimit-burst 10 --hashlimit-htable-size 4096
--hashlimit-htable-max 262144 -j RETURN
but it wasn't holding:
xxxx:11:05 white kernel: xt_hashlimit: max count of 262144 reached
xxxx:11:05 white kernel: xt_hashlimit: max count of 262144 reached
xxxx:11:05 white kernel: xt_hashlimit: max count of 262144 reached
xxxx:11:05 white kernel: xt_hashlimit: max count of 262144 reached
xxxx:11:05 white kernel: xt_hashlimit: max count of 262144 reached
xxxx:11:05 white kernel: xt_hashlimit: max count of 262144 reached
xxxx:11:05 white kernel: xt_hashlimit: max count of 262144 reached
xxxx:11:05 white kernel: xt_hashlimit: max count of 262144 reached
xxxx:11:05 white kernel: xt_hashlimit: max count of 262144 reached
xxxx:11:10 white kernel: net_ratelimit: 239072 callbacks suppressed
xxxx:11:10 white kernel: xt_hashlimit: max count of 262144 reached
xxxx:11:10 white kernel: xt_hashlimit: max count of 262144 reached
Am I doing it wrong?
Should I set hashlimit-htable-size = hashlimit-htable-max in order to
achieve better performance and map 1 IP to 1 bucket?
I even tried to take a look at the module source code but I'm not
skilled enough to fully understand it :D
I'm asking if there is some in-depth documentation about how
hashlimit-htable-max interact with the other
parameters(--hashlimit-htable-expire & --hashlimit-htable-gcinterval) in
order to handle high traffic flows or if anyone got real world
experience taking hashlimit to the limit :)
Thank you
reply other threads:[~2012-04-11 8:44 UTC|newest]
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