Date: Thu, 26 Sep 2002 18:23:19 +0200 From: Alexander Leidinger <Alexander@Leidinger.net> To: Dan Nelson <dnelson@allantgroup.com> Cc: brooks@one-eyed-alien.net, toha@ib.com.ua, freebsd-current@FreeBSD.ORG Subject: Re: Journaled filesystem in CURRENT Message-ID: <20020926182319.68907194.Alexander@Leidinger.net> In-Reply-To: <20020926155218.GA67579@dan.emsphone.com> References: <200209251319.g8PDJYoD047918@ib.com.ua> <20020925111232.B3686@Odin.AC.HMC.Edu> <20020926111949.5c0da160.Alexander@Leidinger.net> <20020926155218.GA67579@dan.emsphone.com>
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On Thu, 26 Sep 2002 10:52:18 -0500 Dan Nelson <dnelson@allantgroup.com>
wrote:
> > We have something better than those. SoftUpdates. Much faster than
> > jfs in metadata intensive operations.
>
> If you can stand the 20 minutes of severly degraded performance while
> the background fsck runs after a crash, and the loss of any files
Sometimes it's better to have 20 minutes (or how long it takes to do the
bg-fsck on your FS) degraded performance, than no performance at all
(you can have this too, just configure the system to make an fg-fsck
instead of a bg-fsck)... (how long does it take to check the journal and
to do some appropriate actions depending on the journal?)
> created up to 30 seconds (by default) before the crash.
There's no guarantee with a journaled fs, that the data before the crash
is on the disk. A journaled fs is in the same boat with SO here.
Bye,
Alexander.
--
Secret hacker rule #11: hackers read manuals.
http://www.Leidinger.net Alexander @ Leidinger.net
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