Date: Mon, 1 Nov 1999 07:04:24 -0800 From: Stephen Byan <Stephen.Byan@quantum.com> To: freebsd-fs@FreeBSD.ORG Subject: RE: journaling UFS and LFS Message-ID: <8133266FE373D11190CD00805FA768BF02EE9DD7@shrcmsg1.tdh.qntm.com>
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>Chang Song [mailto:song@zk3.dec.com] wrote: > >Don wrote: >> >> Softupdates is definitely a viable solution however it does not address >> several issues and the license is not a BSD license so it makes me >> uncomfortable. > >Could you let me know what SoftUpdate does not address? >Thank you. One potential problem with soft updates is that the order of creation/deletion/truncation/etc of files is not preserved through a crash or power outage, wheras UFS and logged file systems (not logging file systems as in LFS; what do you say the kind that maintain a recovery log in addition to their regular metadata?) preserve this ordering. I wonder how many recovery strategies are broken by soft updates. Anyone have any data? Regards, -Steve Steve Byan <stephen.byan@quantum.com> Design Engineer Quantum Corporation <http://www.quantum.com>; MS 1-3/E23 333 South Street Shrewsbury, MA 01545 voice: (508) 770-3414 fax: (508) 770-2604 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-fs" in the body of the message
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