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Date:      Mon, 21 Apr 2008 22:06:39 +0200 (CEST)
From:      Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>
To:        Tore Lund <tl32@next.online.no>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: Sidetracked: why gjournal over soft-updates (Was: Re: UFS2
Message-ID:  <20080421220526.T1721@wojtek.tensor.gdynia.pl>
In-Reply-To: <480A6538.5000102@next.online.no>
References:  <fu5nkb$3ib$1@ger.gmane.org> <790871.1688.qm@web57004.mail.re3.yahoo.com> <9bbcef730804180840y77adff73x7ad0cf90c82633a9@mail.gmail.com> <200804192005.06962.fbsd.questions@rachie.is-a-geek.net> <9bbcef730804191302t31eaf472s1b7e64fe5915b9b1@mail.gmail.com> <480A6538.5000102@next.online.no>

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>> than SU
>
> The caching can be stopped by putting "hw.ata.wc=0" into
> /boot/loader.conf.  Doesn't that settle this point about safety?


but that's not needed. UPS is enough. even if your machine will 
halt/crash/panic, drive cache will be written then.

> Since we use softupdates and others use gjournal, one suspects that
> there are reasons why "real" journaling systems have not been adopted.

softupdates works very well, and doesn't write the same thing twice, like 
journaling.





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