[OpenAFS-devel] vos dump busying out the volume while dumping...

[Neulinger, Nathan]

I put in a very basic implementation of "vos copy" in the patch attached
to RT #1174 if you want to try it out.

It does just full copies at the moment, I'll add some code to do "clone
if same partition" soon.

Syntax:

vos copy users.nneul.test1 afs11 a users.nneul.test2 afs11 b -verbose

-- Nathan

------------------------------------------------------------
Nathan Neulinger                       EMail:  nneul@umr.edu
University of Missouri - Rolla         Phone: (573) 341-4841
Computing Services                       Fax: (573) 341-4216


> -----Original Message-----
> From: Neulinger, Nathan=20
> Sent: Wednesday, October 23, 2002 1:13 PM
> To: openafs-devel@openafs.org
> Subject: RE: [OpenAFS-devel] vos dump busying out the volume=20
> while dumping...
>=20
>=20
> I'm not sure it's a reference count for the vnode, I think it would be
> for the underlying inode on the server vice partition, but I'll admit,
> I'm not that up on the real low level internals. Maybe one of the core
> developers has some input here.=20
>=20
> -- Nathan
>=20
> ------------------------------------------------------------
> Nathan Neulinger                       EMail:  nneul@umr.edu
> University of Missouri - Rolla         Phone: (573) 341-4841
> Computing Services                       Fax: (573) 341-4216
>=20
>=20
> > -----Original Message-----
> > From: Michael Niksch [mailto:nik@zurich.ibm.com]=20
> > Sent: Wednesday, October 23, 2002 1:02 PM
> > To: openafs-devel@openafs.org
> > Subject: Re: [OpenAFS-devel] vos dump busying out the volume=20
> > while dumping...
> >=20
> >=20
> > > I think that if you created it as a clone on the same=20
> partition, it
> > > would work fine, but whenever you move the parent volume,=20
> > or move the
> > > clone, it would cease to be a clone.  I don't think=20
> > anything actually
> > > cares if a clone exists, since it all does CopyOnWrite for all
> > > changes.
> >=20
> > So would it be possible to do perform 'vos backup' and 'vos
> > addsite,release' on such a differently named clone and end up with 5
> > clones of the same clone (plus any dynamic clones during=20
> 'vos move' or
> > 'vos copy'). Would it be possible to perform multiple 'vos copy' and
> > end up with an essentially unlimited number of clones? I guess there
> > must be something like a reference count for a vnode that can=20
> > overflow,
> > at which point it will look as if it were zero and make your data
> > disappear altogether. At which number of clones would that=20
> happen - 8,
> > 256, 64K ?
> >=20
> > --=20
> > Michael Niksch                     /Zurich/IBM @ IBMCH
> > IBM Zurich Research Laboratory     nik@zurich.ibm.com
> > Saeumerstrasse 4                   http://www.zurich.ibm.com/~nik/
> > CH-8803 Rueschlikon / Switzerland  P: +41-1-724-8913 F:=20
> +41-1-724-8080
> > _______________________________________________
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> > OpenAFS-devel@openafs.org
> > https://lists.openafs.org/mailman/listinfo/openafs-devel
> >=20
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