[squid-users] Scaling concurrent TCP sessions beyond ephemeral port range

[Praveen Ponakanti]

Amos,

Thanks, will wait for the feature on the squid-6 release.
Praveen

On Thu, Sep 8, 2022 at 7:50 PM Amos Jeffries <squid3 at treenet.co.nz> wrote:

> On 9/09/22 11:41, Praveen Ponakanti wrote:
> > Hi Alex,
> >
> >
> > Thanks for all the help from the squid dev group with upstreaming the
> > enhancement to scale up outbound TCP sessions on Linux with the
> > IP_BIND_ADDRESS_NO_PORT sockopt flag. Our canary instances have been
> > doing great the last few weeks with the code patch prior to merge.
> >
> >
> > A few followup questions (not urgent) :
> >
> >   * Do we know which 5.x version will include the patch? I do not see it
> >     listed in the change log for squid-5.7.
>
> Squid-5 is in "stable" release cycle already which means the changes
> applied to it are quite restricted.
>
> IMO this change is more of a performance optimization than a bug fix, so
> this is being left for Squid-6 which is supposed to start releasing in a
> few months (Feb 2023).
>
>
>
> >   * We have a large number of workers (30) to help with handling a
> >     high RPS. However, TCP session reuse does not seem to be optimal
> >     even with server_persistent_connections enabled as a new outbound
> >     session would have to be opened up if the request is proxied by a
> >     kid worker that doesn’t already have a connection to that
> >     destination. Is there something that can be done to improve this
> >     with later versions of squid? Would be glad to help out if anyone
> >     has some suggestions.
>
> It sounds to me like your situation is one that this system architecture
> was designed to service:
> <https://wiki.squid-cache.org/ConfigExamples/ExtremeCarpFrontend>
>
>
>
> Cheers
> Amos
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