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Date:      Thu, 7 Jun 2001 09:52:14 -0500
From:      Mike Meyer <mwm@mired.org>
To:        "Mario Doria" <madd@tecdigital.net>
Cc:        questions@freebsd.org
Subject:   Re: journalised filesystem
Message-ID:  <15135.38174.554745.239920@guru.mired.org>
In-Reply-To: <56725799@toto.iv>

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Mario Doria <madd@tecdigital.net> types:
> Hello,
> 
> A quick question, is it safe to use softupdates on all the partitions of a
> disk? or there is a catch for using soft updates on every partition of a
> system?

There's one catch. Soft udpates causes free space to be available
slightly slower than otherwise. I don't mean that deleting a file is
slower - I believe the opposite is true - but that you aren't able to
use the space that's been freed by deleting the file immediately. So
the sequence of deleting and then recreating a file larger than the
free space on the drive will fail where it wouldn't have before.

The only time I've ever seen this happen in practice is installing a
new kernel on a small root file system.

	<mike
--
Mike Meyer <mwm@mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.

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