From: Ben Greear <greearb@candelatech.com>
To: David Miller <davem@davemloft.net>
Cc: eric.dumazet@gmail.com, simonchennj@gmail.com, netdev@vger.kernel.org
Subject: Re: increase the number of routing tables
Date: Mon, 30 Jan 2012 09:26:25 -0800 [thread overview]
Message-ID: <4F26D2C1.7030108@candelatech.com> (raw)
In-Reply-To: <20120129.160152.1463516627658543873.davem@davemloft.net>
On 01/29/2012 01:01 PM, David Miller wrote:
> From: Ben Greear<greearb@candelatech.com>
> Date: Sat, 28 Jan 2012 18:46:01 -0800
>
>> On 01/28/2012 06:41 PM, Eric Dumazet wrote:
>>> Its is possible, but probably not scalable.
>>
>> I've run with a few thousand routing tables and probably 5000 or so
>> rules. It seems to run OK....
>>
>>> You really should not have too many "ip rule" entries, since they are
>>> evaluated linearly.
>>
>> For every packet, or maybe just until conn-track gets an entry
>> for the connection?
>
> When the routing cache is removed, using a huge number of rules is not
> going to be something you want to do any more because the rule table
> will be inspected on every route lookup.
Well, that sounds like a reason to keep the routing cache around,
even if it isn't used by default, perhaps.
Thanks,
Ben
--
Ben Greear <greearb@candelatech.com>
Candela Technologies Inc http://www.candelatech.com
next prev parent reply other threads:[~2012-01-30 17:26 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-29 2:20 increase the number of routing tables Simon Chen
2012-01-29 2:23 ` Simon Chen
2012-01-29 11:50 ` Jan Engelhardt
2012-01-29 23:24 ` Ed W
2012-01-30 0:31 ` Stephen Hemminger
2012-01-30 2:02 ` Jan Engelhardt
2012-01-30 16:14 ` Stephen Hemminger
2012-01-30 18:57 ` Jan Engelhardt
2012-01-30 19:21 ` Stephen Hemminger
2012-01-29 2:41 ` Eric Dumazet
2012-01-29 2:46 ` Ben Greear
2012-01-29 4:20 ` Simon Chen
2012-01-29 19:26 ` Ben Greear
2012-01-31 3:06 ` Simon Chen
2012-01-29 21:02 ` David Miller
2012-01-29 21:01 ` David Miller
2012-01-30 17:26 ` Ben Greear [this message]
2012-01-30 17:36 ` David Miller
2012-01-30 12:25 ` Thomas Graf
2012-01-30 12:44 ` Eric Dumazet
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