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Date:      Wed, 18 Jun 2003 13:35:14 -0400
From:      Chuck Swiger <cswiger@mac.com>
To:        Forrest Aldrich <forrie@forrie.com>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: mfs/ramdisk performance issues
Message-ID:  <3EF0A2D2.2070508@mac.com>
In-Reply-To: <5.2.1.1.2.20030618121909.03c44748@192.168.1.1>
References:  <5.2.1.1.2.20030618121909.03c44748@192.168.1.1>

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Forrest Aldrich wrote:
[ ... ]
> In a mail gateway configuration, several people have suggested that 
> using a tmpfs (or mfs, depending upon your flavor of Unix) would provide 
> a performance increase (i/o).   Though someone argued (on a list 
> posting) that the buffering on normal disk operation would probably be 
> better.

I'm not sure about "better", but certainly "safer".  What happens to spooled 
mail on a tmpfs/mfs filesystem when the system goes down?

Anyway, most mail servers are limited by network bandwidth, not by local I/O 
performance.  If you're not talking about hundreds of thousands of messages per 
day, you probably don't need to worry about performance tuning this aspect.

-- 
-Chuck



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