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Date:      Tue, 6 May 2003 15:49:21 +0400
From:      "Artem Tepponen" <temik@egartech.com>
To:        <freebsd-performance@freebsd.org>
Subject:   RE: FFS and minfree...
Message-ID:  <5235EF9BAE6B7F4CB3735789EEF73B2907425F@turtle.egar.egartech.com>

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> From: Charles Swiger [mailto:cswiger@mac.com]
> Sent: Monday, May 05, 2003 10:47 PM

> > Should they be asking 'Why FS design is so flawed
> > that it has this [minfree] requirement' instead?
> 
> No.

Good answer. Explains everything.

> > Is there any working FS for FreeBSD that does not have this 
> > requirement?
> 
> The FFS doesn't have a requirement that you reserve any free space, 
> although doing so is a reasonable default for most 
> circumstances due to the performance advantages.

Were those defaults reasonable when disks were small and files
usually were in 100k range? I suspect many of my files are
a bit larger.

More precise question: will I lose anything performance wise
if I'll drop minfree to 0% and partition where this happens
contains primarily files in 5Mb+ range?

> Do you enjoy having to defragment other filesystem types, by 
> any chance?

Background defragmenter/cleaner/whatever running at 3am
actually wouldn't bother me too much. But I do enjoy having
a few gigs more. There is no such thing as too much storage.

Artem


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