From mboxrd@z Thu Jan  1 00:00:00 1970
From: Michael Tremer <michael.tremer@ipfire.org>
To: development@lists.ipfire.org
Subject: Re: Merge Window Closing Announcement for Core Update 127
Date: Mon, 14 Jan 2019 10:43:38 +0000
Message-ID: <E2AF2F28-897C-48A8-B286-8F82D860CBD4@ipfire.org>
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Hello,

> On 13 Jan 2019, at 14:24, Bernhard Bitsch <Bernhard.Bitsch(a)gmx.de> wrote:
>=20
>=20
>=20
>> Gesendet: Sonntag, 13. Januar 2019 um 13:43 Uhr
>> Von: "Matthias Fischer" <matthias.fischer(a)ipfire.org>
>> An: "Michael Tremer" <michael.tremer(a)ipfire.org>
>> Cc: "IPFire: Development-List" <development(a)lists.ipfire.org>
>> Betreff: Re: Merge Window Closing Announcement for Core Update 127
>>=20
>> Hi,
>>=20
>> On 13.01.2019 13:14, Michael Tremer wrote:
>>> I sent squid thousands of requests with ab (Apache Benchmark) and that wo=
rked fine with only one redirector.
>>=20
>> Thanks for the feedback! Merged. ;-)
>>=20
>>=20
>=20
> Nevertheless it's worth reasoning about multiprocessing ( #redirectors =3D =
#processors ) versus multitasking ( #redirectors =3D #task needed by the envi=
ronment ).
> Even with only one processor it is possible to serve multiple requests. Usi=
ng wait phases for other processes is a basic feature of multitasking.

This is not true for the redirectors though.

Our version of squidGuard takes only one request at a time. While processing =
that, it performs a database lookup (which is a btree) which is held in memor=
y. So at no time it is reading anything from disk which would allow the kerne=
l to interrupt the process and wait until the hard drive has responded.

Therefore it does not make any sense to run more than one process per CPU cor=
e.

I guess update accelerator might suffer a little bit in the instance that it =
finds a match. Squidclamav is a different thing. It makes absolutely no sense=
 to use that any more.

-Michael

> - Bernhard ( aka BeBiMa )


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