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List: freebsd-performance
Subject: Re: {* 05.00 *}Re: Re: Re: Desperate with 870 QVO and ZFS
From: egoitz () ramattack ! net
Date: 2022-04-07 14:02:16
Message-ID: beef3c19927a42ca8f6a0a80b8036589 () ramattack ! net
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Sure!!! good to know mate!!!
Thanks Mike!!
El 2022-04-07 15:43, 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 4/7/2022 7:25 AM, mike tancsa wrote: On 4/7/2022 4:59 AM, egoitz@ramattack.net \
> wrote: 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 :)
> Think of the extreme case where you do something like
>
> dd if=/dev/zero of=/tank/junk.bin bs=1m count=10000
>
> as this is a 20G file that takes just a few hundred bytes of write IO on a \
> compressed system. Obviously, as the compress ratio reduces in the real world the \
> benefits become less. Where that diminishing return is, not sure. But something \
> to keep in mind
You might also want to have a look at this article which I found quite
helpful
https://klarasystems.com/articles/openzfs1-understanding-transparent-compression/
---Mike
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<p>Sure!!! good to know mate!!!</p> <p><br /></p>
<p>Thanks Mike!!</p>
<div> </div>
<p><br /></p>
<p>El 2022-04-07 15:43, mike tancsa escribió:</p>
<blockquote type="cite" style="padding: 0 0.4em; border-left: #1010ff 2px solid; \
margin: 0"><!-- html ignored --><!-- head ignored --><!-- meta ignored --> <div \
class="pre" style="margin: 0; padding: 0; font-family: monospace">ATENCION<br /> \
ATENCION<br /> <span style="white-space: \
nowrap;">ATENCION!!! Este correo se ha enviado desde&nbs \
p;fuera de la organizacion. No pinche en los e \
nlaces ni abra los adjuntos a no ser que \
reconozca el remitente y sepa que el contenido es seguro.</span><br \
/> <br /> <span style="white-space: \
nowrap;">On 4/7/2022 7:25 AM, mike tancsa wrote:</span> \
<blockquote type="cite" style="padding: 0 0.4em; border-left: #1010ff 2px solid; \
margin: 0"><span style="white-space: \
nowrap;">On 4/7/2022 4:59 AM, <a \
href="mailto:egoitz@ramattack.net">egoitz@ramattack.net</a> wrote:</span> \
<blockquote type="cite" style="padding: 0 0.4em; border-left: #1010ff 2px solid; \
margin: 0"><br /> <span style="white-space: nowrap;">Hi Mike!</span><br /> <br \
/> 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 :)</blockquote> <br /> <br /> <span style="white-space: \
nowrap;">Think of the extreme case where you do something like</span><br \
/> <br /> <span style="white-space: \
nowrap;">dd if=/dev/zero of=/tank/junk.bin bs=1m count=10000</span><br \
/> <br /> as this is a 20G file that takes just a few hundred bytes of write IO on a \
compressed system. Obviously, as the compress ratio reduces in the real world the \
benefits become less. Where that diminishing return is, not sure. But \
something to keep in mind<br /> <br /> </blockquote> You might also want to have a \
look at this article which I found quite helpful<br /> <br /> <br /> <span \
style="white-space: nowrap;"><a \
href="https://klarasystems.com/articles/openzfs1-understanding-transparent-compression/" \
target="_blank" rel="noopener \
noreferrer">https://klarasystems.com/articles/openzfs1-understanding-transparent-compression/</a></span><br \
/> <br /> <br /> <span style="white-space: \
nowrap;"> ---Mike</span><br /> <br /> </div> </blockquote>
</body></html>
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