From owner-freebsd-current  Thu May 14 00:11:16 1998
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Date: Thu, 14 May 1998 00:06:59 -0700 (PDT)
From: Julian Elischer <julian@whistle.com>
To: Mikhail Teterin <mi@aldan.algebra.com>
cc: current@FreeBSD.ORG
Subject: Re: soft updates and async
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you may run a filesystem in async if you turn off soft updates
soft updates is faster however in many real-world applications
as async still queues SOME operations, and soft updates can detect when 
an unlink makes a write to disk that was scheduled un-needed,
where async will still go through with it..
(think of temporary work files)

personally I'd just run with softupdates..
certainly it is faster for /tmp to do so.
try some comparisons.
I'd be interested to see the results.

julian


On Thu, 14 May 1998, Mikhail Teterin wrote:

> 
> Ok, it turns out you need the filesystem mount sync to use softupdates.
> 
> My understanding was: softupdates are faster then sync and safer
> then sync. Is not async still faster, even at the expense of safety?
> 
> Will I be able to combine async and softupdates in the future and why
> would I want to?
> 
> Thanks a lot!
> 
> 	-mi
> 
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