Date: Thu, 11 Jan 2007 10:36:51 -0500 From: Kris Kennaway <kris@obsecurity.org> To: Willem Jan Withagen <wjw@digiware.nl> Cc: stable@freebsd.org Subject: Re: running mksnap_ffs Message-ID: <20070111153651.GC31382@xor.obsecurity.org> In-Reply-To: <459ABB40.7050603@digiware.nl> References: <459ABB40.7050603@digiware.nl>
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--V88s5gaDVPzZ0KCq Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Jan 02, 2007 at 09:06:24PM +0100, Willem Jan Withagen wrote: > Hi, >=20 > I got the following Filesystem: > Filesystem Size Used Avail Capacity iused ifree %iused=20 > /dev/da0a 1.3T 422G 823G 34% 565952 182833470 0% >=20 > Running of a 3ware 9550, on a dual core Opteron 242 with 1Gb. > The system is used as SMB/NFS server for my other systems here. >=20 > I would like to make weekly snapshots, but manually running mksnap_ffs=20 > freezes access to the disk (I sort of expected that) but the process=20 > never terminates. So I let is sit overnight, but looking a gstat did not= =20 > reveil any activity what so ever... > The disk was not released, mksnap_ffs could not be terminated. > And things resulted in me rebooting the system. >=20 > So: > - How long should I expect making a snapshot to take: > 5, 15, 30min, 1, 2 hour or even more??? Yes :) Snapshots were not designed for use in this way (they were designed to support background fsck and allow faster system recovery after power failure), so they don't scale as well as you might like on large filesystems. Kris --V88s5gaDVPzZ0KCq Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.1 (FreeBSD) iD8DBQFFplmTWry0BWjoQKURApHiAJ9ZYTqn4HRnu9oN4TTCFd2xbdBkWwCgmsM2 a39TnVfL1a3gdmSnv/VDe+w= =GyfK -----END PGP SIGNATURE----- --V88s5gaDVPzZ0KCq--
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