[RADIATOR] Issue with authentication and farmsize option

Thu Apr 14 12:33:45 UTC 2022

hello

i would recommend the following formula:

FarmSize = (X * (C + 1))

where C is the number of Cores of the system.

where X is the threading/processing factor, which depends on factors like Intel vs AMD and Hyperthreading.

a conservative safe value for X is 2 -- for AMD you can assume up to 4 as safe.

so for 4 Cores you can safely configure a FarmSize of 10 (20 for AMD).

since Radiator does cooperative blocking on a select queue,
so processes that are not needed will only require a minuscle amount of cpu.

from operation experience, i have 8 and 16 core servers in production,
running multiple (8+) instances of Radiator with FarmSize from 32 to 128 each.

hope that helped

Yours sincerely

Alfred Reibenschuh

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Today's Topics:

   1. Re: Issue with authentication and farmsize option
      (Stefan Paetow (OpenSource))

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Message: 1
Date: Thu, 14 Apr 2022 01:16:06 +0100
From: "Stefan Paetow (OpenSource)" <oss at eons.net>
To: "radiator at lists.open.com.au" <radiator at lists.open.com.au>
Subject: Re: [RADIATOR] Issue with authentication and farmsize option
Message-ID:
        <CAGmwA8r9pgdzGKqW4qX0yY8-AJaQ5fVJuii04GvGneSxFOrxXw at mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

Hi Dubravko,

In the UK service, because we only have a limited number of processors
(with lscpu) on our new platform, we set our FarmSize to 3 times the lscpu
number, and it's certainly helped with throughput. So, I'd suggest setting
yours to 16, just to see how that improves the throughput?

Our old hardware actually had 12 and 16 processors (with 24 and 32 cores
respectively) and in those instances we literally got away with just
running the number of lscpu instances in the FarmSize.

Hope that helps.

Stefan

On Tue, 12 Apr 2022 at 07:59, Dubravko Penezic <dpenezic at srce.hr> wrote:

> Hi ,
>
> we run latest RADIATOR on VM with 4 processor and 4G RAM, and have set
> FarmSize to 4 (actually that mean 4 spare RADIATOR instance), usually we
> have about 80 request on all 4 instance per second, how ever in some
> pick time we reach 150+ authentication per second. In that period we
> have issue.
>
> In RADIATOR log we see no authentication request for second or two, then
> process continue normaly, and that may repeat few times in period of
> 5-10 minutes ... then everything continue to work normally.
>
> Any idea, suggestion ?
>
> Regards,
> Dubravko Penezic
> SRCE
> _______________________________________________
> radiator mailing list
> radiator at lists.open.com.au
> https://lists.open.com.au/mailman/listinfo/radiator
>
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