Date: Thu, 07 Apr 2022 10:59:50 +0200
From: egoitz@ramattack.net
To: mike tancsa <mike@sentex.net>
Cc: Bob Friesenhahn <bfriesen@simple.dallas.tx.us>, freebsd-fs@freebsd.org, freebsd-hackers@freebsd.org, Freebsd performance <freebsd-performance@freebsd.org>
Subject: Re: {* 05.00 *}Re: Re: Desperate with 870 QVO and ZFS
Message-ID: <609373d106c2244a8a2a3e2ca5e6eb73@ramattack.net>
In-Reply-To: <d8eec440-aff5-e2c7-35d5-04ac96939213@sentex.net>
References: <4e98275152e23141eae40dbe7ba5571f@ramattack.net> <665236B1-8F61-4B0E-BD9B-7B501B8BD617@ultra-secure.de> <0ef282aee34b441f1991334e2edbcaec@ramattack.net> <28e11d7ec0ac5dbea45f9f271fc28f06@ramattack.net> <ca3f86f2-94a1-be94-ad55-7bd1c9bc50ab@grosbein.net> <7aa95cb4bf1fd38b3fce93bc26826042@ramattack.net> <alpine.GSO.2.20.2204061513180.9475@scrappy.simplesystems.org> <d8eec440-aff5-e2c7-35d5-04ac96939213@sentex.net>
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Hi Mike!
Thanks a lot for your comment. I see. As said before, we didn't really
enable compression because we just keep the config as FreeBSD leaves by
default. Apart from that, having tons of disk space and well... for
avoiding the load of compress/decompress... The main reason was it was
not enabled by default really and not to have seen a real reason for
it.... was not more than that....
I appreciate your comments really :)
Cheers,
El 2022-04-06 22:43, mike tancsa escribió:
> ATENCION
> ATENCION
> ATENCION!!! Este correo se ha enviado desde fuera de la organizacion. No pinche en los enlaces ni abra los adjuntos a no ser que reconozca el remitente y sepa que el contenido es seguro.
>
> On 4/6/2022 4:18 PM, Bob Friesenhahn wrote: On Wed, 6 Apr 2022, egoitz@ramattack.net wrote:
> WE DON'T USE COMPRESSION AS IT'S NOT SET BY DEFAULT. SOME PEOPLE SAY YOU SHOULD HAVE IT ENABLED.... BUT.... JUST FOR AVOID HAVING SOME DATA COMPRESSED SOME OTHER NOT (IN CASE YOU ENABLE AND LATER DISABLE) AND FINALLY FOR AVOID ACCESSING TO INFORMATION WITH DIFFERENT CPU COSTS OF HANDLING... WE HAVE NOT TOUCHED COMPRESSION....
There seems to be a problem with your caps-lock key.
Since it seems that you said that you are using maildir for your mail
server, it is likely very useful if you do enable even rather mild
compression (e.g. lz4) since this will reduce the write work-load and
even short files will be stored more efficiently.
FYI, a couple of our big zfs mailspools sees a 1.24x and 1.23x
compress ratio with lz4. We use Maildir format as well. They are not
RELENG_13 so not sure how zstd would fair.
---Mike
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<p>Hi Mike!</p>
<p><br /></p>
<p>Thanks a lot for your comment. I see. As said before, we didn't really e=
nable compression because we just keep the config as FreeBSD leaves by defa=
ult. Apart from that, having tons of disk space and well... for avoiding th=
e load of compress/decompress... The main reason was it was not enabled by =
default really and not to have seen a real reason for it.... was not more t=
han that....</p>
<p><br /></p>
<p>I appreciate your comments really :)</p>
<p><br /></p>
<p>Cheers,</p>
<div> </div>
<p><br /></p>
<p>El 2022-04-06 22:43, mike tancsa escribió:</p>
<blockquote type=3D"cite" style=3D"padding: 0 0.4em; border-left: #1010ff 2=
px solid; margin: 0"><!-- html ignored --><!-- head ignored --><!-- meta ig=
nored -->
<div class=3D"pre" style=3D"margin: 0; padding: 0; font-family: monospace">=
ATENCION<br /> ATENCION<br /> <span style=3D"white-space: nowrap;">ATENCION=
!!! Este correo se ha enviado desde fuer=
a de la organizacion. No pinche en los&n=
bsp;enlaces ni abra los adjuntos a no se=
r que reconozca el remitente y sepa que&=
nbsp;el contenido es seguro.</span><br /> <br /> <span style=
=3D"white-space: nowrap;">On 4/6/2022 4:18 PM, Bob =
;Friesenhahn wrote:</span>
<blockquote type=3D"cite" style=3D"padding: 0 0.4em; border-left: #1010ff 2=
px solid; margin: 0"><span style=3D"white-space: nowrap;">On Wed, =
;6 Apr 2022, <a href=3D"mailto:egoitz@ramattack.net">egoitz@=
ramattack.net</a> wrote:</span>
<blockquote type=3D"cite" style=3D"padding: 0 0.4em; border-left: #1010ff 2=
px solid; margin: 0">
<blockquote type=3D"cite" style=3D"padding: 0 0.4em; border-left: #1010ff 2=
px solid; margin: 0"><br /> WE DON'T USE COMPRESSION AS IT'S NOT SET BY DEF=
AULT. SOME PEOPLE SAY YOU SHOULD HAVE IT ENABLED.... BUT.... JUST FOR AVOID=
HAVING SOME DATA COMPRESSED SOME OTHER NOT (IN CASE YOU ENABLE AND LATER D=
ISABLE) AND FINALLY FOR AVOID ACCESSING TO INFORMATION WITH DIFFERENT CPU C=
OSTS OF HANDLING... WE HAVE NOT TOUCHED COMPRESSION....</blockquote>
</blockquote>
<br /> <span style=3D"white-space: nowrap;">There seems to b=
e a problem with your caps-lock key.</span><b=
r /> <br /> Since it seems that you said that you are using maildir for you=
r mail server, it is likely very useful if you do enable even rather mild c=
ompression (e.g. lz4) since this will reduce the write work-load and even s=
hort files will be stored more efficiently.<br /> </blockquote>
FYI, a couple of our big zfs mailspools sees a 1.24x and 1.23x compre=
ss ratio with lz4. We use Maildir format as well. They are not =
RELENG_13 so not sure how zstd would fair.<br /> <br /> <span style=3D"whit=
e-space: nowrap;"> ---Mike</span><br /> <br /> </div=
>
</blockquote>
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