[courier-users] Re: Fun with authpipe

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Johnny Lam writes:

> Sam Varshavchik wrote:
>> Johnny Lam writes:
>>=20
>>> Sam Varshavchik wrote:
>>>
>>>> There's one potential problem with this.
>>>>
>>>> The default configuration setting runs 5 authdaemond processes.
>>>>
>>>> You get five logins come in at the same time. You turn around and=20
>>>> reconnect to authdaemond, five times. Your connection requests will=20
>>>> timeout because no more authdaemond processes are available.
>>>
>>>
>>> Yes, that is true. I forgot to mention that I had doubled the defaul=
t=20
>>> number of authdaemond processes that are started from 5 to 10. =20
>>> Despite the increased resource usage, I'm pleased that there was a=20
>>> simple way to mix having a virtual shared folder setup with a separat=
e=20
>>> PAM-based authentication procedure.
>>=20
>>=20
>> Replace =E2=80=9Cfive=E2=80=9D with =E2=80=9Cten=E2=80=9D, in the give=
n example.
>=20
> I'm not sure I understand the point you're making, possibly due to my=20
> misunderstanding how authdaemond works.

It means that this approach will fail no matter how many authdaemond=20
processes you have configured. If you set the number of processes to X,=20
then if X connections arrive nearly simultaneously, then they will fail.

Increasing the number of daemon processes does not totally eliminate the=20
problem, it only makes it less likely to occur.



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