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

[Heinz Mauelshagen]

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 at RedHat.com                            PHONE +49  171 7803392
                                                  FAX   +49 2626 924446
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