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From: Andrew Theurer <habanero@us.ibm.com>
To: Joe Thornber <joe@fib011235813.fsnet.co.uk>
Subject: Re: [Announce] device-mapper beta3 (fast snapshots)
Date: Mon, 15 Jul 2002 09:39:15 -0500
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On Monday 15 July 2002 03:59, Joe Thornber wrote:
> Andrew,
>
> On Fri, Jul 12, 2002 at 06:21:08PM -0500, Andrew Theurer wrote:
> > Thanks for the results.  I tried the same thing, but with the latest
> > release (beta 4) and I am not observing the same behavior.  Your results
> > show very little difference in performance when using different chunk
> > sizes for snapshots, but I observed a range of 10 to 24 seconds for this
> > same test on beta4 (I have also included EVMS 1.1 pre4):
>
> I must admit your results are strange to say the least, the only
> explanation that I can think of at the moment is that you have been
> running LVM1.
>
> Just to reassure me that this is not the case, can you please make
> sure that the LVM1 driver is not available, and that your path are not
> picking up old LVM1 tools by mistake.  There was a time when the tools
> were installed in /usr/sbin rather than /sbin.

Joe, 

I assure you this is not LVM1.  I have both tools installed, but they are 
under different directories, and my test scripts call them with full paths.  
I have also done some tracing to verify I am in device-mapper code.  Also, 
the kernel I tested with has only device mapper and evms, no lvm1. 

-Andrew Theurer
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