Date: Tue, 20 Apr 2010 21:29:46 -1000 (HST) From: Jeff Roberson <jroberson@jroberson.net> To: Patrick Tracanelli <eksffa@freebsdbrasil.com.br> Cc: current@freebsd.org Subject: Re: HEADS UP: SUJ Going in to head today Message-ID: <alpine.BSF.2.00.1004202129040.1398@desktop> In-Reply-To: <4BCE291D.7070006@freebsdbrasil.com.br> References: <alpine.BSF.2.00.1004201212340.1398@desktop> <4BCE291D.7070006@freebsdbrasil.com.br>
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On Tue, 20 Apr 2010, Patrick Tracanelli wrote: > Jeff Roberson escreveu: >> Hi Folks, >> >> You may have seen my other Soft-updates journaling (SUJ) announcements. >> If not, it is a journaling system that works cooperatively with >> soft-updates to eliminate the full background filesystem check after an >> unclean shutdown. SUJ may be enabled with tunefs -j enable and disabled >> with tunefs -j disable on an unmounted filesystem. It is backwards >> compatible with soft-updates with no journal. >> >> I'm going to do another round of tests and buildworld this afternoon to >> verify the diff and then I'm committing to head. This is a very large >> feature and fundamentally changes softupdates. Although it has been >> extensively tested by many there may be unforseen problems. If you run >> into an issue that you think may be suj please email me directly as well >> as posting on current as I sometimes miss list email and this will >> ensure the quickest response. > > Hello Jeff, McKusick and others envolved. > > Is an MFC technically possible? If so, are there plans to do so? I do have an 8 backport branch available although it is a little stale. I intend to keep it somewhat up to date. I think it will take some time before we have sufficient experience with SUJ in head before we want to put it back in 8. It is quite a complex and disruptive feature. Thanks, Jeff > > Thank you. > > -- > Patrick Tracanelli >
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