Date: Tue, 9 Jun 1998 15:28:47 +0200 (MET DST) From: Nick Hibma <nick.hibma@jrc.it> To: Lorenzo.Cavassa@ALPcom.IT Cc: FreeBSD hackers mailing list <hackers@FreeBSD.ORG> Subject: Re: Newbie 3 questions. Message-ID: <Pine.GSO.3.95q.980609152526.19366H-100000@elect8> In-Reply-To: <qTEf18FWYK7H092yn@monviso.alpcom.it>
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> : ... and (as John well knows) it can be tuned to run an async policy
> : similar to the one in Linux. Which policy you run is a tradeoff
>
> how?
mount -o async <devive>
or while the system is running
mount -o update,async <device>
Example
rm -rf /usr (coule of thousand files)
Takes minutes.
mount -o update,async /usr ; rm -rf /usr ; mount -o update,sync /usr
Takes 2 seconds on a pentiumII and 13 seconds on a P233 (SDRAM, both
cases)
Try it! And see for yourself! BIG GRIN :-]]]
If you have anything operational, DON'T USE ASYNC! You'll have 0 byte
files before you know it after a crash/unexpected reboot. And believe
me, you're going to search all over the place to find that one.
Be warned.
Nick
STA-ISIS, T.P.270, Joint Research Centre, Italy
building: 27A
tel.: +39 332 78 9549
fax.: +39 332 78 9185
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