Date: Wed, 8 Mar 2006 15:55:23 -0800 (PST) From: John Kozubik <john@kozubik.com> To: freebsd-fs@freebsd.org Subject: UFS2 snapshots - comments requested Message-ID: <20060308151738.L55438@kozubik.com>
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I just hung up a completely idle 6.0-RELEASE system by deleting a large number of files on a snapshotted filesystem (it had seven snapshots running on it). I have never seen snapshots work reliably in FreeBSD. I suspect that if you are using snapshots and they seem reliable, it is because you aren't doing much with them, or running enough of them. Since the first of the year, I have submitted two PRs detailing erratic behavior with snapshots: kern/92272 kern/92292 and these PRs only represent the behavior that I could isolate and define - I am regularly seeing system hangs resulting from any number of seemingly innocuous activities. My questions: - is this instability (circa 6.0) acknowledged ? - is there a large, known problem that, when fixed, will cause all of these little problems to go away, or should I keep submitting PRs when I verify misc. problems ? - can any visibility be offered as to the possible future viability of UFS2 snapshots in 6.0 ? Many thanks. ----- John Kozubik - john@kozubik.com - http://www.kozubik.com
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