Date: Thu, 12 Feb 2004 19:09:26 -0800 From: David Schultz <das@FreeBSD.ORG> To: Tom Arnold <xyzzy@sysabend.org> Cc: freebsd-fs@FreeBSD.ORG Subject: Re: Upcoming filesystems? Message-ID: <20040213030926.GA37208@VARK.homeunix.com> In-Reply-To: <20040213022010.GA2331@frontfree.net> References: <20040212235605.GP13780@moo.sysabend.org> <20040213022010.GA2331@frontfree.net>
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On Thu, Feb 12, 2004, Tom Arnold wrote: > Are there any Journaling FS projects ongoing for FreeBSD that arn't on the > general radar? I believe there is an effort underway to port SGI's XFS to FreeBSD. On Fri, Feb 13, 2004, Xin LI wrote: > There was a journalling fs in FreeBSD in the past, however, it was removed > (after it was imported from 4.4BSD-Lite2's distribution) because there > are few people who want it. You're thinking of LFS, which isn't exactly the same as journalling. In LFS, the journal *is* the filesystem. LFS does share the advantage of requiring no fsck, though. (It requires an incremental cleaner, but that runs continuously in the background.) Modern-day ``LFS-like'' filesystems include HP AutoRAID, Network Appliances' filesystem, and Sun's Zettabyte Filesystem. The latter two are not technically log-structured, but they perform block allocation and provide consistency in similar ways. NetBSD has an LFS implementation that is true to the original.
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