From: Gionatan Danti <g.danti@assyoma.it>
To: Dave Chinner <david@fromorbit.com>
Cc: linux-xfs@vger.kernel.org
Subject: Re: Slow file stat/deletion
Date: Fri, 28 Apr 2017 22:14:54 +0200 [thread overview]
Message-ID: <a3e391cf2ce08858aef806d5f052f73e@assyoma.it> (raw)
In-Reply-To: <a37b6669-4ec1-074e-de51-ae15aee5a7d9@assyoma.it>
Hi all,
this is a note which can be useful to someone searching for the same
thing: using "ftype=1" at mkfs time (which is, by the way, the default
for CRC-enabled filesystem) greatly speed-up stat/find operations.
On a test case with 1.000.000 files and 1000 total directories, "find
/mnt/xfs" time has fallen from ~70 to ~20 seconds.
As a side question: there is no method/possibility to enable ftype=1 to
an already existing filesystem, right?
Thanks.
Il 29-11-2016 08:53 Gionatan Danti ha scritto:
> On 28/11/2016 22:53, Dave Chinner wrote:
>>
>> Nope. There's always going to be a penalty for subverting the
>> filesystem's physical layout optimisations on storage subsystems
>> that require physical layout optimisation for performance.
>>
>> Cheers,
>>
>> Dave.
>>
>
> Ok, very clear.
>
> Thank you for taking the time to explain, Dave.
--
Danti Gionatan
Supporto Tecnico
Assyoma S.r.l. - www.assyoma.it
email: g.danti@assyoma.it - info@assyoma.it
GPG public key ID: FF5F32A8
next prev parent reply other threads:[~2017-04-28 20:20 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-25 10:40 Slow file stat/deletion Gionatan Danti
2016-11-27 22:14 ` Dave Chinner
2016-11-28 9:51 ` Gionatan Danti
2016-11-28 21:53 ` Dave Chinner
2016-11-29 7:53 ` Gionatan Danti
2017-04-28 20:14 ` Gionatan Danti [this message]
2017-04-28 21:03 ` Eric Sandeen
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