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DATE 2021-05-01

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MESSAGE
DATE 2021-05-19
FROM John Dunlap
SUBJECT Re: [Learn] Perl-based event server?
From learn-bounces-at-nylxs.com Tue Jul 6 06:10:21 2021
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From: John Dunlap
Date: Wed, 19 May 2021 09:56:07 -0500
Message-ID:
To: Jan Kasprzak
Cc: mod_perl list
Content-Type: multipart/mixed; boundary="00000000000076208705c2b00718"
Subject: Re: [Learn] Perl-based event server?
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Good luck. I've begun porting our application to Elixir because of this and
other issues.

On Wed, May 19, 2021 at 4:57 AM Jan Kasprzak wrote:

> Hello, mod_perl users,
>
> TL;DR: which Perl-based solution would you recommend for serving long-term
> HTTP connections?
>
> We use mod_perl for our project, and we would like to add
> a component which needs long-term connections (think websockets or
> server-side-events
>
> https://developer.mozilla.org/en-US/docs/Web/API/Server-sent_events/Using_server-sent_events
> ).
> We use mpm_prefork for the main site, so adding long-term connections
> there is not feasible. So I am looking for alternatives. The logic
> behind this application would probably not be overly complicated,
> probably just forwarding pub/sub events from Redis or some other
> message broker to HTTP clients or something like that.
>
> I would expect to serve about 30-100k simultaneous connections,
> not necessarily handled by a single host. The peak value of 10k connections
> per host would be sufficient. I expect I will put haproxy or some other
> load balancer in front of these servers, so for example SSL/TLS is not
> strictly necessary.
>
> Is mod_perl with mpm_worker suitable for this task? Or should I use
> something AnyEvent-based, such as Twiggy (I don't know whether Twiggy
> supports multiple processes/threads)? Or even something completely
> different?
>
> Thanks in advance for any recommendations.
>
> -Yenya
>
> --
> | Jan "Yenya" Kasprzak
> |
> | http://www.fi.muni.cz/~kas/ GPG: 4096R/A45477D5
> |
> We all agree on the necessity of compromise. We just can't agree on
> when it's necessary to compromise. --Larry Wall
>


--
John Dunlap
*CTO | Lariat *

*Direct:*
*john-at-lariat.co *

*Customer Service:*
877.268.6667
support-at-lariat.co

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Good luck. I've begun porting our application to Elixi=
r because of this and other issues.

>
On Wed, May 19, 2021 at 4:57 AM Jan =
Kasprzak <kas-at-fi.muni.cz> wrote=
:
8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">=C2=A0 =C2=A0 =
=C2=A0 =C2=A0 Hello, mod_perl users,



TL;DR:=C2=A0 which Perl-based solution would you recommend for serving long=
-term

=C2=A0 =C2=A0 =C2=A0 =C2=A0 HTTP connections?



=C2=A0 =C2=A0 =C2=A0 =C2=A0 We use mod_perl for our project, and we would l=
ike to add

a component which needs long-term connections (think websockets or

server-side-events

nts/Using_server-sent_events" rel=3D"noreferrer" target=3D"_blank">https://=
developer.mozilla.org/en-US/docs/Web/API/Server-sent_events/Using_server-se=
nt_events
).

We use mpm_prefork for the main site, so adding long-term connections

there is not feasible. So I am looking for alternatives. The logic

behind this application would probably not be overly complicated,

probably just forwarding pub/sub events from Redis or some other

message broker to HTTP clients or something like that.



=C2=A0 =C2=A0 =C2=A0 =C2=A0 I would expect to serve about 30-100k simultane=
ous connections,

not necessarily handled by a single host. The peak value of 10k connections=


per host would be sufficient. I expect I will put haproxy or some other

load balancer in front of these servers, so for example SSL/TLS is not

strictly necessary.



=C2=A0 =C2=A0 =C2=A0 =C2=A0 Is mod_perl with mpm_worker suitable for this t=
ask? Or should I use

something AnyEvent-based, such as Twiggy (I don't know whether Twiggyr>
supports multiple processes/threads)? Or even something completely differen=
t?



Thanks in advance for any recommendations.



-Yenya



--

| Jan "Yenya" Kasprzak <kas at {rel=3D"noreferrer" target=3D"_blank">fi.muni.cz - work | p://yenya.net" rel=3D"noreferrer" target=3D"_blank">yenya.net - private=
}> |

| nk">http://www.fi.muni.cz/~kas/=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0GPG: 4096R/A45477D5 |r>
=C2=A0 =C2=A0 We all agree on the necessity of compromise. We just can'=
t agree on

=C2=A0 =C2=A0 when it's necessary to compromise.=C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0--Larry Wall



--
mail_signature">
arial">ot;,sans-serif;font-size:large">John Dunlap
ont-size:small;font-family:arial">s",sans-serif">a,sans-serif;font-style:normal">CTO |=C2=A0y:tahoma,sans-serif;font-style:normal">Lariat>;font-style:normal">=C2=A0
l;font-family:arial">serif">font-style:normal">
family:arial">=
yle:normal">Direct:
nt-family:arial">f">-style:normal">04)" target=3D"_blank">john-at-lariat.co
t-size:small;font-family:arial">quot;,sans-serif">sans-serif;font-style:normal">
Customer Service:
=
53,153,153);font-family:arial,helvetica,sans-serif">7" style=3D"color:rgb(17,85,204)">877.268.6667
=3D"font-size:small;font-family:arial">);font-family:arial,helvetica,sans-serif">co" style=3D"color:rgb(17,85,204)" target=3D"_blank">support-at-lariat.co<=
/span>
d:ii_hwm90qu91_146b4d583171a8e6" width=3D"100" height=3D"60">
div>

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