Re: 2.6.16.20/dm: can't create more then one snapshot of an lv

Heinz Mauelshagen
2006-06-20T11:55:54Z

On Tue, Jun 20, 2006 at 09:46:13PM +1000, CaT wrote:
> On Tue, Jun 20, 2006 at 12:02:09PM +0200, Heinz Mauelshagen wrote:
> > How many snapshots active at once ?
>
> 1. I can start more then 1 premade snapshots just fine and use them
> but the moment I add another one a freeze occurs.

Well, that's fairly few ;)

>
> > I guess this is a kcopyd scalability issue which needs addressing.
>
> Well in the end I'm hoping to get at least 7. Hopefully that's not
> insane. :)

No, I was assuming, you were trying to activate plenty.

FYI: the snapshot code in 2.6.17-rc has received a fair amount of fixes
which might help this vs. 2.6.16.20.

>
> --
> "To the extent that we overreact, we proffer the terrorists the
> greatest tribute."
> - High Court Judge Michael Kirby

--

Regards,
Heinz -- The LVM Guy --

*** Software bugs are stupid.
Nevertheless it needs not so stupid people to solve them ***

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Heinz Mauelshagen Red Hat GmbH
Consulting Development Engineer Am Sonnenhang 11
Storage Development 56242 Marienrachdorf
Germany
Mauelshagen@RedHat.com PHONE +49 171 7803392
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