Re: [dm-devel] mirrored device with thousand of mappingtableentries

["Eli Malul" <eli malul kaminario com>]

OK, I will try that and check the implications of that, thanks!!

But, do you know why having 10,000 extents is causing this overwhelming
memory usage?

-----Original Message-----
From: Alasdair G Kergon [mailto:agk redhat com] 
Sent: Monday, February 28, 2011 3:10 PM
To: Eli Malul
Cc: device-mapper development
Subject: Re: [dm-devel] mirrored device with thousand of
mappingtableentries

On Mon, Feb 28, 2011 at 02:17:52PM +0200, Eli Malul wrote:
> I expect to have thousands of non contiguous extents (so I created a
> synthetic mapping table to test the device-mapper behavior).
> 
> Any suggestions?
 
> -----Original Message-----
> From: Alasdair G Kergon [mailto:agk redhat com] 
> Sent: Monday, February 28, 2011 2:12 PM
> To: Eli Malul
> Cc: device-mapper development

> (And if, unlike that example, your extents are not
> contiguous,
> create two new devices that join them together, and mirror those.
> That's
> what LVM does.)

That.
dm0 = list 0
dm1 = list 1
dm2 = mirror of dm0 and dm1

Alasdair