Date: Sat, 4 Nov 2023 10:01:34 +0100 From: Ronald Klop <ronald@FreeBSD.org> To: Mark Millard <marklmi@yahoo.com>, FreeBSD-STABLE Mailing List <freebsd-stable@freebsd.org> Subject: Re: Is 14.0 to released based on 0 for sysctl vfs.zfs.bclone_enabled ? Message-ID: <7a906956-6836-421e-b25e-ff701369e3ed@FreeBSD.org> In-Reply-To: <2F81D978-7DBD-42CE-8ECF-C020B0CB5C29@yahoo.com> References: <2F81D978-7DBD-42CE-8ECF-C020B0CB5C29.ref@yahoo.com> <2F81D978-7DBD-42CE-8ECF-C020B0CB5C29@yahoo.com>
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On 11/4/23 02:39, Mark Millard wrote: > It looks to me like releng/14.0 (as of 14.0-RC4) still has: > > int zfs_bclone_enabled; > SYSCTL_INT(_vfs_zfs, OID_AUTO, bclone_enabled, CTLFLAG_RWTUN, > &zfs_bclone_enabled, 0, "Enable block cloning"); > > leaving block cloning effectively disabled by default, no > matter what the pool has enabled. > > https://www.freebsd.org/releases/14.0R/relnotes/ also reports: > > QUOTE > OpenZFS has been upgraded to version 2.2. New features include: > • > block cloning, which allows shallow copies of blocks in file copies. This is optional, and disabled by default; it can be enabled with sysctl vfs.zfs.bclone_enabled=1. > END QUOTE > I think this answers your question in the subject. > Just curiousity on my part about the default completeness of > openzfs-2.2 support, not an objection either way. > I haven't seen new issues with block cloning in the last few weeks mentioned on the mailing lists. All known issues are fixed AFAIK. But I can imagine that the risk+effect ratio of data corruption is seen as a bit too high for a 14.0 release for this particular feature. That does not diminish the rest of the completeness of openzfs-2.2. NB: I'm not involved in developing openzfs or the decision making in the release. Just repeating what I read on the lists. Regards, Ronald. > > === > Mark Millard > marklmi at yahoo.com > >
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