Re: PF State Expiration Model for Huge Amount of States

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02-18-2008, 08:38 AM

=?ISO-8859-1?Q?C=E9dric_Berger?=

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Re: PF State Expiration Model for Huge Amount of States

Teemu Takanen wrote:

> Now if we add call to this function with a small, probably configurable,
> argument (typically 0-20) to pf_insert_state we keep up purging old
> state entries while generating new ones. In cases with stable states
> never expiring (and practically never coming up with new ones either),
> nothing changes from the current way of doing things. At sites where the
> connection creation rate is huge compared to the packet rate, the
> PFTM_INTERVAL can be set in pf.conf to a large number and still the
> purging done at insert_state can prevent the kernel running out of memory.

Yeah, tying the garbage collection to allocation is what is being done
successfully in many such systems.

Cedric

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Re: PF State Expiration Model for Huge Amount of States